This is a disclaimer: 
Using the notes below is dangerous for both your sanity and peace of mind.  
If you still want to read them beware of the fact that they may be "not even wrong".

Everything I write in there is just a mnemonic device to give me a chance to
fix things I badly broke because I'm bloody stupid and think I can tinker with stuff
that is way above my head and go away with it. It reminds me of Gandalf's warning: 
"Perilous to all of us are the devices of an art deeper than we ourselves possess."

Moreover, a lot of it I blatantly stole on the net from other obviously cleverer 
persons than me -- not very hard. Forgive me. My bad.

Please consider it and go away. You have been warned!

MRTG (Multi Router Traffic Grapher) Setup at the BIC

(:toc:)

Introduction

  • The BIC has acquired 4 Cisco switches, model SB300–52 — Small Business Switch with 52x 1000Gibs ports.
  • Those switched are manageable, can be used as L2 or L3 switches (L2 as we speak) and are SNMP aware.
  • We want to collect statistics on their performance and throughputs.
  • We will use the current NMS system to probe their SNMP agents.
  • 20150416: Added the Cisco 10 Gigabit Ethernet switch Nexus-5000 to the MRTG setup.

Software Base

The following pieces of software are installed on the current NMS system: 

ii  mrtg                    2.16.3-3                multi router traffic grapher
ii  mrtg-contrib            2.16.3-3                multi router traffic grapher (contributed files)
ii  mrtg-rrd                0.7-3                   The script for generating graphs for MRTG statistics
ii  mrtgutils               0.7                     Utilities to generate statistics for mrtg

Also required along those are the RRD tools and utilities, perl, zlib, libpng, libgd2, etc, and obviously the whole suite of SNMP tools: 

ii  librrd4                           1.4.3-1                 time-series data storage and display system (runtime library)
ii  librrds-perl                      1.4.3-1                 time-series data storage and display system (Perl interface, s
ii  mrtg-rrd                          0.7-3                   The script for generating graphs for MRTG statistics
ii  rrdtool                           1.4.3-1                 time-series data storage and display system (programs)

ii  libnet-snmp-perl                  5.2.0-4                      Script SNMP connections
ii  libsnmp-base                      5.4.3~dfsg-2+squeeze1        SNMP (Simple Network Management Protocol) MIBs and documentation
ii  libsnmp-perl                      5.4.3~dfsg-2+squeeze1        SNMP (Simple Network Management Protocol) Perl5 support
ii  libsnmp-session-perl              1.13-1                       Perl support for accessing SNMP-aware devices
ii  libsnmp15                         5.4.3~dfsg-2+squeeze1        SNMP (Simple Network Management Protocol) library
ii  nagios-snmp-plugins               1.1.1-7                      SNMP Plugins for nagios
ii  snmp                              5.4.3~dfsg-2+squeeze1        SNMP (Simple Network Management Protocol) applications
ii  snmp-mibs-downloader              1.1                          Install and manage Management Information Base (MIB) files
ii  snmpd                             5.4.3~dfsg-2+squeeze1        SNMP (Simple Network Management Protocol) agents
ii  snmptrapfmt                       1.14                         A configurable snmp trap handler daemon for snmpd
ii  snmptt                            1.3-1                        SNMP trap handler for use with snmptrapd

MRTG Config

  • Check that SNMPV2 is enabled on the switch with the proper community name.
  • Allow SNMP access from the NMS to the switch sw-b4-u35.
  • The use of public as the community name is not recommanded: this is only meant as an example.
  • Test SNMPV2 access from the NMS with snmpwalk for example. Lets query the object system in SNMPv2-MIB: 
matsya:~# snmpwalk -Os -c public -v 2c sw-b4-u35 system
SNMPv2-MIB::sysDescr.0 = STRING: 52-Port Gigabit Managed Switch
SNMPv2-MIB::sysObjectID.0 = OID: SNMPv2-SMI::enterprises.9.6.1.83.52.1
SNMPv2-MIB::sysUpTime.0 = Timeticks: (59447800) 6 days, 21:07:58.00
SNMPv2-MIB::sysContact.0 = STRING: bicadmin@bic.mni.mcgill.ca
SNMPv2-MIB::sysName.0 = STRING: sw-b4-u35
SNMPv2-MIB::sysLocation.0 = STRING: WB212 Rack B4-U35
SNMPv2-MIB::sysServices.0 = INTEGER: 2
SNMPv2-MIB::sysORLastChange.0 = Timeticks: (0) 0:00:00.00
SNMPv2-MIB::sysORID.1 = OID: SNMPv2-SMI::enterprises.89.73
SNMPv2-MIB::sysORDescr.1 = STRING: RS capabilities
SNMPv2-MIB::sysORUpTime.1 = Timeticks: (0) 0:00:00.00
  • The MRTG will run as user and group www-data so /var/www/mrtg must belong to www-data.
  • A few other files (pid, etc) and directories ownerships and permissions will have to be modified. 
chown www-data.www-data /var/log/mrtg/*
chgrp -R www-data /var/www/mrtg
chmod g+w -R /var/www/mrtg
chgrp www-data /var/lock/mrtg
chown www-data /var/lock/mrtg
chmod g+w /var/lock/mrtg
chmod g+s /var/lock/mrtg
chown www-data.www-data /var/lib/mrtg
chown www-data.www-data /etc/mrtg
  • Use the utility cfgmaker to create a starting config. It will be fine-tuned later: 
/usr/bin/cfgmaker --global "WorkDir: /var/www/mrtg" --global "Options[_]: bits,growright" --output /etc/mrtg/mrtg.cfg public@sw-b4-u35
  • The ouput file /etc/mrtg/mrtg.cfg will contain a run-of-mill config.
  • A few errors will be produced the first 2 time the command /usr/bin/mrtg —user www-data —group www-data /etc/mrtg/mrtg.cfg.
  • Satisfy yourself that the log and png files are correctly created.
  • Modify /etc/mrtg/mrtg.cfg to run mrtg as a daemon and uses RRD tools rather than text logfiles.
  • Insert an Include directive for the sw-b4-u35 targets. 
# Created by 
# /usr/bin/cfgmaker --global "WorkDir: /var/www/mrtg" --global "Options[_]: bits,growright" --output /etc/mrtg/mrtg.cfg public@sw-b4-u35

### Global Config Options

#  for Debian
WorkDir: /var/www/mrtg

### Global Defaults

#  to get bits instead of bytes and graphs growing to the right
# Options[_]: growright, bits

EnableIPv6: no
Options[_]: bits,growright
LogFormat: rrdtool
IconDir: /mrtg/

RunAsDaemon: Yes
Interval:    5

Include: /etc/mrtg/sw-b4-u35.cfg
  • /etc/mrtg/sw-b4-u35.cfg 
#####################################################################
# System: sw-b4-u35
# Description: 52-Port Gigabit Managed Switch
# Contact: bicadmin@bic.mni.mcgill.ca
# Location: WB212 Rack B4-U35
######################################################################

### Interface 70 >> Descr: 'gigabitethernet22' | Name: 'gi22' | Ip: '' | Eth: '30-78-33-34-61-38-34-65-30-36-65-64-61-65' ###

Target[sw-b4-u35_70]: 70:public@sw-b4-u35:::::2
SetEnv[sw-b4-u35_70]: MRTG_INT_IP="" MRTG_INT_DESCR="gigabitethernet22"
MaxBytes[sw-b4-u35_70]: 125000000
Title[sw-b4-u35_70]: Traffic Analysis for 70 -- sw-b4-u35
PageTop[sw-b4-u35_70]: <h1>Traffic Analysis for 70 -- sw-b4-u35</h1>
	<div id="sysdetails">
		<table>
			<tr>
				<td>System:</td>
				<td>sw-b4-u35 in WB212 Rack B4-U35</td>
			</tr>
			<tr>
				<td>Maintainer:</td>
				<td>bicadmin@bic.mni.mcgill.ca</td>
			</tr>
			<tr>
				<td>Description:</td>
				<td>gigabitethernet22  </td>
			</tr>
			<tr>
				<td>ifType:</td>
				<td>ethernetCsmacd (6)</td>
			</tr>
			<tr>
				<td>ifName:</td>
				<td>gi22</td>
			</tr>
			<tr>
				<td>Max Speed:</td>
				<td>1000.0 Mbits/s</td>
			</tr>
		</table>
	</div>

#---%<----%<-----
  • Cisco switches SGx00 SNMP implementation offsets switchport numbers by 48.
  • The directive Target[sw-b4-u35_70]: 70:public@sw-b4-u35:::::2 specifies to query gigabit ethernet port 22 (70 = 22 + 48).
  • Counters will be returned as 32bit numbers and wrap-around will probably occur in 5 minutes for gigabit interface. SNMPV2C uses 64 bits counters.
  • :::::2 specifies to use SNMPV2c to query the agent.
  • It can added automatically using the option —snmp-options=:::::2 when using cfgmaker

Unicasts, Broadcasts and Multicasts Statistics

  • The Cisco switch SB300–52 doesn’t seem to return any 64bit counters for the delivered and transmitted packets.
  • Use the 32bit counters defined in the MIB IF-MIB::ifMIB 
# Those are all 32bit counters. XX is the port number to query.
#
# IF-MIB::ifInUcastPkts.XX      (.1.3.6.1.2.1.2.2.1.11.XX)
# IF-MIB::ifInBroadcastPkts.XX  (.1.3.6.1.2.1.31.1.1.1.3.XX)
# IF-MIB::ifInMulticastPkts.XX  (.1.3.6.1.2.1.31.1.1.1.2.XX)
# IF-MIB::ifInDiscards          (.1.3.6.1.2.1.2.2.1.13.XX)
# IF-MIB::ifInErrors            (.1.3.6.1.2.1.2.2.1.14.XX)
# IF-MIB::ifOutUcastPkts.XX     (.1.3.6.1.2.1.2.2.1.17.XX)
# IF-MIB::ifOutBroadcastPkts.XX (.1.3.6.1.2.1.31.1.1.1.5.XX)
# IF-MIB::ifOutMulticastPkts.XX (.1.3.6.1.2.1.31.1.1.1.4.XX)
# IF-MIB::ifOutDiscards         (.1.3.6.1.2.1.2.2.1.19.XX)
# IF-MIB::ifOutErrors           (.1.3.6.1.2.1.2.2.1.20.XX)
  • A generic, template definition for Unicast packets.
  • Use the fact that MRTG knows a number of symbolic OIDs by name.
  • RTFM man mrtg-mibhelp for all the details. 
# Unicast Packets
# Replace XX by the switchport number and YY by XX+48.

Target[sw-b4-u35_YY_unicast]: ifInUcastPkts.YY&ifOutUcastPkts.YY:cisc0cisc0@sw-b4-u35
MaxBytes[sw-b4-u35_YY_unicast]: 125000000
Title[sw-b4-u35_YY_unicast]: Unicast Traffic Analysis for port XX -- sw-b4-u35
ShortLegend[sw-b4-u35_YY_unicast]: Packet/s
YLegend[sw-b4-u35_YY_unicast]: Packet/s
Legend1[sw-b4-u35_YY_unicast]: Delivered Packets/s
Legend2[sw-b4-u35_YY_unicast]: Transmited Packets/s
LegendI[sw-b4-u35_YY_unicast]: Delivered Packets/s
LegendO[sw-b4-u35_YY_unicast]: Transmitted Packets/s
PageTop[sw-b4-u35_YY_unicast]: <h1>Unicast Traffic Analysis for port XX -- sw-b4-u35</h1>
        <div id="sysdetails">
            <table>
                <tr>
                    <td>System:</td>
                    <td>sw-b4-u35 in WB212 Rack B4-U35</td>
                </tr>
                <tr>
                    <td>Maintainer:</td>
                    <td>bicadmin@bic.mni.mcgill.ca</td>
                </tr>
                <tr>
                    <td>Description:</td>
                    <td>gigabitethernetXX  </td>
                </tr>
                <tr>
                    <td>ifName:</td>
                    <td>giXX</td>
                </tr>
            </table>
        </div>
  • You want broadcast traffic? Just s/unicast/broadcast/gc in the above.
  • Replace ifInUcastPkts.YY by ifInBroadcastPkts.YY and ifOutUcastPkts.YY by ifOutBroadcastPkts.YY

Switch CPU utilization

  • OID .1.3.6.1.4.1.9.6.1.101.1.8 is defined in the MIB rlCpuUtilDuringLastMinute 
~# snmptranslate -Of CISCOSB-rndMng::rndMng.rlCpuUtilDuringLastMinute
.iso.org.dod.internet.private.enterprises.9.6.1.switch001.rndMng.rlCpuUtilDuringLastMinute

~# snmptranslate -Ofn CISCOSB-rndMng::rndMng.rlCpuUtilDuringLastMinute
.1.3.6.1.4.1.9.6.1.101.1.8
  • Use rlCpuUtilDuringLast5Minutes (OID .1.3.6.1.4.1.9.6.1.101.1.9) for the last 5 minutes usage.
  • The switch CPU usage in percent can can be plotted with the following target definition: 
#/JF/ 20150320. Stolen from http://pmoghadam.com/homepage/HTML/MRTG-cpu-mem-cisco.html with a few mods.
Target[sw-b4-u35_cpu]: .1.3.6.1.4.1.9.6.1.101.1.8.0&.1.3.6.1.4.1.9.6.1.101.1.9.0:public@sw-b4-u35:::::2
Title[sw-b4-u35_cpu]: CPU Utilization for sw-b4-u35
MaxBytes[sw-b4-u35_cpu]: 100
ShortLegend[sw-b4-u35_cpu]: %
YLegend[sw-b4-u35_cpu]: % of CPU Load
Legend1[sw-b4-u35_cpu]: CPU Utilization
LegendI[sw-b4-u35_cpu]: CPU Load :
LegendO[sw-b4-u35_cpu]:
Options[sw-b4-u35_cpu]: nopercent, gauge, integer, growright, derive, pngdate
Unscaled[sw-b4-u35_cpu]: ymwd
PageTop[sw-b4-u35_cpu]: <h1>CPU Utilization for sw-b4-u35</h1>
                <div id="sysdetails">
                        <table>
                                <tr>
                                        <td>System:</td>
                                        <td>sw-b4-u35 in WB212 Rack B4-U35</td>
                                </tr>
                                <tr>
                                        <td>Maintainer:</td>
                                        <td>bicadmin@bic.mni.mcgill.ca</td>
                                </tr>
                        </table>
                </div>

Web Config

  • The package mrtg-rrd provides a cgi-bin perl executable /usr/lib/cgi-bin/mrtg-rrd.cgi that will do all the jobs.
  • Only thing required is to allow access the cgi-bin directory and the MRTG working directory specified with the directive WorkDir=/var/www/mrtg in its config file /etc/mrtg/mrtg.cfg. 
    <Directory /var/www/>
        Options Indexes FollowSymLinks MultiViews
        AllowOverride None
        Order Deny,Allow
        Deny from all
        Allow from 132.206.178.
        Allow from 65.94.233.61 # JF at home
        Allow from 172.16.50.44 # OpenVPN access from mobile devices.
    </Directory>

    ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/

    <Directory "/usr/lib/cgi-bin">
        AllowOverride None
        Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
        Order Deny,Allow
        Deny from all
        Allow from 132.206.178.
        Allow from 65.94.233.61 # JF at home
        Allow from 172.16.50.44 # OpenVPN access from mobile devices.
    </Directory>

MRTG Init Script

  • Create the file /etc/default/mrtg that will contains options to be passed to mrtg> 
NAME=mrtg
PIDFILE=/etc/mrtg/$NAME.pid
CONFIG=/etc/mrtg/mrtg.cfg
#DAEMON_ARGS="--user www-data --group www-data --debug=base,tarp,snpo,snpo2 --logging /var/log/mrtg/mrtg.log --pid-file=$PIDFILE"
DAEMON_ARGS="--user www-data --group www-data --pid-file=$PIDFILE"
  • I stole an init script and modified it to fit with Debian LSB: 
#! /bin/sh
### BEGIN INIT INFO
# Provides:          mrtg
# Required-Start:    
# Required-Stop:     
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: mrtg init script
# Description:       This file is used to start, stop, restart, 
#                    and determined status of the mrtg daemon.
# Author:            iasptk.com ;
### END INIT INFO
### START OF SCRIPT
set -e
# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="mrtg"
NAME=mrtg
DAEMON=/usr/bin/$NAME
DAEMON_ARGS="/etc/mrtg/mrtg.cfg"
PIDFILE=/etc/mrtg/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME

# Reads config file (will override defaults above)
[ -r /etc/default/mrtg ] && . /etc/default/mrtg

# Exit if the mrtg package is not installed
[ -x "$DAEMON" ] || exit 0
# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh
# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions
# Function that starts the mrtg daemon
start()
{
    env LANG=C start-stop-daemon --start --quiet \
    --exec $DAEMON -- $DAEMON_ARGS $CONFIG
}
# Function that stops the mrtg daemon
stop()
{
    start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 \
    --pidfile $PIDFILE 
}
case "$1" in
  start)
    log_daemon_msg "Starting $DESC" 
    start
    case "$?" in
        0) log_end_msg 0 ;;
        1) log_end_msg 1 ;;
    esac
    ;;
  stop)
    log_daemon_msg "Stopping $DESC"
    stop
    case "$?" in
        0) log_end_msg 0 ;;
        1) log_end_msg 1 ;;
    esac
    ;;
  restart|force-reload)
    log_daemon_msg "Restarting $DESC" 
    stop
    case "$?" in
      0|1)
        start
        case "$?" in
            0) log_end_msg 0 ;;
            1) log_end_msg 1 ;; 
        esac
        ;;
    esac
    ;;
    status)
    status_of_proc "$DAEMON" "$NAME"  
    ;;
  *)
    echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" 
    ;;
esac
exit 0
### END OF SCRIPT
  • Create the init scripts for different run-levels: 
update-rc.d mrtg defaults

Cisco Nexus-5010 20 ports 10GbE Switch

  • Open a ssh session to the switch and through the CLI:
  • Create a SNMP v2c community on the switch that belongs to the group network-operator (read-only).
  • Don’t forget to copy the running config to the startup one!
  • This shows some snmp roles defined on the switch by default. 
sw10-xge# show snmp group

Role: network-admin
  Description: Predefined network admin role has access to all commands on the switch
  -------------------------------------------------------------------
  Rule    Perm    Type        Scope               Entity                  
  -------------------------------------------------------------------
  1       permit  read-write  

Role: network-operator
  Description: Predefined network operator role has access to all read commands on the switch
  -------------------------------------------------------------------
  Rule    Perm    Type        Scope               Entity                  
  -------------------------------------------------------------------
  1       permit  read        

...
  • Create the commnunity and save the switch running config to the startup config.
  • Please don’t use public as the community name! 
sw10-xge# configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
sw10-xge(config)# snmp community <community> group network-operator
sw10-xge(config)# exit
sw10-xge# copy running-config startup-config 
[########################################] 100%
  • Test if one can SNMP walk the system MIB 
matsya:~# snmpwalk -Os -v 2c -c <community> sw10-xge SNMPv2-MIB::system
sysDescr.0 = STRING: Cisco NX-OS(tm) n5000, Software (n5000-uk9), Version 5.0(2)N2(1), RELEASE SOFTWARE Copyright (c) 2002-2010 by Cisco Systems, Inc. Device Manager Version 5.0(4a),  Compiled 12/18/2010 23:00:00
sysObjectID.0 = OID: enterprises.9.12.3.1.3.798
sysUpTime.0 = Timeticks: (920561360) 106 days, 13:06:53.60
sysContact.0 = STRING: bicadmin@bic.mni.mcgill.ca
sysName.0 = STRING: sw10-xge
sysLocation.0 = STRING: Room-WB212-Rack-B3-U36
sysServices.0 = INTEGER: 70
sysORLastChange.0 = Timeticks: (2) 0:00:00.02
sysORID.1 = OID: snmpMIB
sysORID.2 = OID: snmpModules.16.2.2.1
sysORID.3 = OID: snmpModules.10.3.1.1
sysORID.4 = OID: snmpModules.11.3.1.1
sysORID.5 = OID: snmpModules.15.2.1.1
sysORDescr.1 = STRING: The MIB module for SNMPv2 entities
sysORDescr.2 = STRING: View-based Access Control Model for SNMP.
sysORDescr.3 = STRING: The SNMP Management Architecture MIB.
sysORDescr.4 = STRING: The MIB for Message Processing and Dispatching.
sysORDescr.5 = STRING: The management information definitions for the SNMP User-based Security Model.
sysORUpTime.1 = Timeticks: (1) 0:00:00.01
sysORUpTime.2 = Timeticks: (1) 0:00:00.01
sysORUpTime.3 = Timeticks: (2) 0:00:00.02
sysORUpTime.4 = Timeticks: (2) 0:00:00.02
sysORUpTime.5 = Timeticks: (2) 0:00:00.02
  • Awesome!
  • Test if one can walk the ifMIB MIB (needed to get conters and traffic statistics on the switch).
  • We are not interested in the 32bit counters so I omit them from the output.
  • Note the numbering scheme for interface names ifName
  • Ethernet1/1 starts at 436207616 (416*1024^2) and interleaved by 96. No clue why. 
matsya:~# snmpwalk -Os -v 2c -c <community> sw10-xge IF-MIB::ifMIB     
ifName.83886080 = STRING: mgmt0
ifName.436207616 = STRING: Ethernet1/1
ifName.436211712 = STRING: Ethernet1/2
ifName.436215808 = STRING: Ethernet1/3
ifName.436219904 = STRING: Ethernet1/4
ifName.436224000 = STRING: Ethernet1/5
ifName.436228096 = STRING: Ethernet1/6
ifName.436232192 = STRING: Ethernet1/7
ifName.436236288 = STRING: Ethernet1/8
ifName.436240384 = STRING: Ethernet1/9
ifName.436244480 = STRING: Ethernet1/10
ifName.436248576 = STRING: Ethernet1/11
ifName.436252672 = STRING: Ethernet1/12
ifName.436256768 = STRING: Ethernet1/13
ifName.436260864 = STRING: Ethernet1/14
ifName.436264960 = STRING: Ethernet1/15
ifName.436269056 = STRING: Ethernet1/16
ifName.436273152 = STRING: Ethernet1/17
ifName.436277248 = STRING: Ethernet1/18
ifName.436281344 = STRING: Ethernet1/19
ifName.436285440 = STRING: Ethernet1/20
ifHCInOctets.83886080 = Counter64: 24095998233
ifHCInOctets.436207616 = Counter64: 0
ifHCInOctets.436211712 = Counter64: 531886488970
ifHCInOctets.436215808 = Counter64: 56677308013362
ifHCInOctets.436219904 = Counter64: 157489219794760
ifHCInOctets.436224000 = Counter64: 29582256630506
ifHCInOctets.436228096 = Counter64: 14566289217649
ifHCInOctets.436232192 = Counter64: 1533894220208
ifHCInOctets.436236288 = Counter64: 1478222692402
ifHCInOctets.436240384 = Counter64: 2179048175843
ifHCInOctets.436244480 = Counter64: 1996717222694
ifHCInOctets.436248576 = Counter64: 60311781562
ifHCInOctets.436252672 = Counter64: 14072983023906
ifHCInOctets.436256768 = Counter64: 0
ifHCInOctets.436260864 = Counter64: 0
ifHCInOctets.436264960 = Counter64: 23666501100676
ifHCInOctets.436269056 = Counter64: 0
ifHCInOctets.436273152 = Counter64: 0
ifHCInOctets.436277248 = Counter64: 0
ifHCInOctets.436281344 = Counter64: 1500106395099
ifHCInOctets.436285440 = Counter64: 71007589203221
ifHCInUcastPkts.83886080 = Counter64: 574848
ifHCInUcastPkts.436207616 = Counter64: 0
ifHCInUcastPkts.436211712 = Counter64: 1888857611
ifHCInUcastPkts.436215808 = Counter64: 6916055039
ifHCInUcastPkts.436219904 = Counter64: 19839825674
ifHCInUcastPkts.436224000 = Counter64: 3530789605
ifHCInUcastPkts.436228096 = Counter64: 11318722543
ifHCInUcastPkts.436232192 = Counter64: 399756295
ifHCInUcastPkts.436236288 = Counter64: 458673381
ifHCInUcastPkts.436240384 = Counter64: 548373956
ifHCInUcastPkts.436244480 = Counter64: 478106430
ifHCInUcastPkts.436248576 = Counter64: 860106035
ifHCInUcastPkts.436252672 = Counter64: 1978600912
ifHCInUcastPkts.436256768 = Counter64: 0
ifHCInUcastPkts.436260864 = Counter64: 0
ifHCInUcastPkts.436264960 = Counter64: 3057843282
ifHCInUcastPkts.436269056 = Counter64: 0
ifHCInUcastPkts.436273152 = Counter64: 0
ifHCInUcastPkts.436277248 = Counter64: 0
ifHCInUcastPkts.436281344 = Counter64: 652402408
ifHCInUcastPkts.436285440 = Counter64: 8825169883
ifHCInMulticastPkts.83886080 = Counter64: 38767617
ifHCInMulticastPkts.436207616 = Counter64: 0
ifHCInMulticastPkts.436211712 = Counter64: 28
ifHCInMulticastPkts.436215808 = Counter64: 1653979
ifHCInMulticastPkts.436219904 = Counter64: 5234
ifHCInMulticastPkts.436224000 = Counter64: 151404
ifHCInMulticastPkts.436228096 = Counter64: 593
ifHCInMulticastPkts.436232192 = Counter64: 2773
ifHCInMulticastPkts.436236288 = Counter64: 50
ifHCInMulticastPkts.436240384 = Counter64: 7152
ifHCInMulticastPkts.436244480 = Counter64: 3227
ifHCInMulticastPkts.436248576 = Counter64: 0
ifHCInMulticastPkts.436252672 = Counter64: 3393
ifHCInMulticastPkts.436256768 = Counter64: 0
ifHCInMulticastPkts.436260864 = Counter64: 0
ifHCInMulticastPkts.436264960 = Counter64: 92
ifHCInMulticastPkts.436269056 = Counter64: 0
ifHCInMulticastPkts.436273152 = Counter64: 0
ifHCInMulticastPkts.436277248 = Counter64: 0
ifHCInMulticastPkts.436281344 = Counter64: 5055591
ifHCInMulticastPkts.436285440 = Counter64: 384623
ifHCInBroadcastPkts.83886080 = Counter64: 133111220
ifHCInBroadcastPkts.436207616 = Counter64: 0
ifHCInBroadcastPkts.436211712 = Counter64: 53018
ifHCInBroadcastPkts.436215808 = Counter64: 16329
ifHCInBroadcastPkts.436219904 = Counter64: 6201
ifHCInBroadcastPkts.436224000 = Counter64: 138443
ifHCInBroadcastPkts.436228096 = Counter64: 17748
ifHCInBroadcastPkts.436232192 = Counter64: 6989
ifHCInBroadcastPkts.436236288 = Counter64: 6928
ifHCInBroadcastPkts.436240384 = Counter64: 8472
ifHCInBroadcastPkts.436244480 = Counter64: 6998
ifHCInBroadcastPkts.436248576 = Counter64: 24
ifHCInBroadcastPkts.436252672 = Counter64: 6841
ifHCInBroadcastPkts.436256768 = Counter64: 0
ifHCInBroadcastPkts.436260864 = Counter64: 0
ifHCInBroadcastPkts.436264960 = Counter64: 8045
ifHCInBroadcastPkts.436269056 = Counter64: 0
ifHCInBroadcastPkts.436273152 = Counter64: 0
ifHCInBroadcastPkts.436277248 = Counter64: 0
ifHCInBroadcastPkts.436281344 = Counter64: 143669
ifHCInBroadcastPkts.436285440 = Counter64: 106470
ifHCOutOctets.83886080 = Counter64: 64615251
ifHCOutOctets.436207616 = Counter64: 0
ifHCOutOctets.436211712 = Counter64: 48584788050200
ifHCOutOctets.436215808 = Counter64: 1653596676786
ifHCOutOctets.436219904 = Counter64: 11513140108771
ifHCOutOctets.436224000 = Counter64: 1206972592544
ifHCOutOctets.436228096 = Counter64: 259437494302170
ifHCOutOctets.436232192 = Counter64: 2425366689487
ifHCOutOctets.436236288 = Counter64: 4090446528831
ifHCOutOctets.436240384 = Counter64: 3725205319188
ifHCOutOctets.436244480 = Counter64: 2966674818256
ifHCOutOctets.436248576 = Counter64: 23881602844951
ifHCOutOctets.436252672 = Counter64: 3041149199131
ifHCOutOctets.436256768 = Counter64: 0
ifHCOutOctets.436260864 = Counter64: 0
ifHCOutOctets.436264960 = Counter64: 350282697042
ifHCOutOctets.436269056 = Counter64: 0
ifHCOutOctets.436273152 = Counter64: 0
ifHCOutOctets.436277248 = Counter64: 0
ifHCOutOctets.436281344 = Counter64: 11825164244753
ifHCOutOctets.436285440 = Counter64: 1638273038079
ifHCOutUcastPkts.83886080 = Counter64: 2257
ifHCOutUcastPkts.436207616 = Counter64: 0
ifHCOutUcastPkts.436211712 = Counter64: 5810491999
ifHCOutUcastPkts.436215808 = Counter64: 3047405341
ifHCOutUcastPkts.436219904 = Counter64: 7095830910
ifHCOutUcastPkts.436224000 = Counter64: 1096418902
ifHCOutUcastPkts.436228096 = Counter64: 31685328775
ifHCOutUcastPkts.436232192 = Counter64: 402406053
ifHCOutUcastPkts.436236288 = Counter64: 588081729
ifHCOutUcastPkts.436240384 = Counter64: 567670742
ifHCOutUcastPkts.436244480 = Counter64: 472007286
ifHCOutUcastPkts.436248576 = Counter64: 2890109434
ifHCOutUcastPkts.436252672 = Counter64: 933532412
ifHCOutUcastPkts.436256768 = Counter64: 0
ifHCOutUcastPkts.436260864 = Counter64: 0
ifHCOutUcastPkts.436264960 = Counter64: 1033893545
ifHCOutUcastPkts.436269056 = Counter64: 0
ifHCOutUcastPkts.436273152 = Counter64: 0
ifHCOutUcastPkts.436277248 = Counter64: 0
ifHCOutUcastPkts.436281344 = Counter64: 1448405970
ifHCOutUcastPkts.436285440 = Counter64: 3680986590
ifHCOutMulticastPkts.83886080 = Counter64: 398021
ifHCOutMulticastPkts.436207616 = Counter64: 0
ifHCOutMulticastPkts.436211712 = Counter64: 3161106
ifHCOutMulticastPkts.436215808 = Counter64: 3041626
ifHCOutMulticastPkts.436219904 = Counter64: 4595586
ifHCOutMulticastPkts.436224000 = Counter64: 4585539
ifHCOutMulticastPkts.436228096 = Counter64: 4478062
ifHCOutMulticastPkts.436232192 = Counter64: 4761853
ifHCOutMulticastPkts.436236288 = Counter64: 4452934
ifHCOutMulticastPkts.436240384 = Counter64: 4811734
ifHCOutMulticastPkts.436244480 = Counter64: 4811730
ifHCOutMulticastPkts.436248576 = Counter64: 372758
ifHCOutMulticastPkts.436252672 = Counter64: 4809261
ifHCOutMulticastPkts.436256768 = Counter64: 0
ifHCOutMulticastPkts.436260864 = Counter64: 0
ifHCOutMulticastPkts.436264960 = Counter64: 4504457
ifHCOutMulticastPkts.436269056 = Counter64: 0
ifHCOutMulticastPkts.436273152 = Counter64: 0
ifHCOutMulticastPkts.436277248 = Counter64: 0
ifHCOutMulticastPkts.436281344 = Counter64: 4551587
ifHCOutMulticastPkts.436285440 = Counter64: 4884394
ifHCOutBroadcastPkts.83886080 = Counter64: 3305
ifHCOutBroadcastPkts.436207616 = Counter64: 0
ifHCOutBroadcastPkts.436211712 = Counter64: 345277
ifHCOutBroadcastPkts.436215808 = Counter64: 252789
ifHCOutBroadcastPkts.436219904 = Counter64: 479616
ifHCOutBroadcastPkts.436224000 = Counter64: 362355
ifHCOutBroadcastPkts.436228096 = Counter64: 489952
ifHCOutBroadcastPkts.436232192 = Counter64: 498760
ifHCOutBroadcastPkts.436236288 = Counter64: 453929
ifHCOutBroadcastPkts.436240384 = Counter64: 504689
ifHCOutBroadcastPkts.436244480 = Counter64: 506198
ifHCOutBroadcastPkts.436248576 = Counter64: 59663
ifHCOutBroadcastPkts.436252672 = Counter64: 505940
ifHCOutBroadcastPkts.436256768 = Counter64: 0
ifHCOutBroadcastPkts.436260864 = Counter64: 0
ifHCOutBroadcastPkts.436264960 = Counter64: 456464
ifHCOutBroadcastPkts.436269056 = Counter64: 0
ifHCOutBroadcastPkts.436273152 = Counter64: 0
ifHCOutBroadcastPkts.436277248 = Counter64: 0
ifHCOutBroadcastPkts.436281344 = Counter64: 322039
ifHCOutBroadcastPkts.436285440 = Counter64: 395107
ifLinkUpDownTrapEnable.83886080 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436207616 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436211712 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436215808 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436219904 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436224000 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436228096 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436232192 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436236288 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436240384 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436244480 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436248576 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436252672 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436256768 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436260864 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436264960 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436269056 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436273152 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436277248 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436281344 = INTEGER: enabled(1)
ifLinkUpDownTrapEnable.436285440 = INTEGER: enabled(1)
ifHighSpeed.83886080 = Gauge32: 1000
ifHighSpeed.436207616 = Gauge32: 10000
ifHighSpeed.436211712 = Gauge32: 10000
ifHighSpeed.436215808 = Gauge32: 10000
ifHighSpeed.436219904 = Gauge32: 10000
ifHighSpeed.436224000 = Gauge32: 10000
ifHighSpeed.436228096 = Gauge32: 10000
ifHighSpeed.436232192 = Gauge32: 10000
ifHighSpeed.436236288 = Gauge32: 10000
ifHighSpeed.436240384 = Gauge32: 10000
ifHighSpeed.436244480 = Gauge32: 10000
ifHighSpeed.436248576 = Gauge32: 10000
ifHighSpeed.436252672 = Gauge32: 10000
ifHighSpeed.436256768 = Gauge32: 10000
ifHighSpeed.436260864 = Gauge32: 10000
ifHighSpeed.436264960 = Gauge32: 10000
ifHighSpeed.436269056 = Gauge32: 10000
ifHighSpeed.436273152 = Gauge32: 10000
ifHighSpeed.436277248 = Gauge32: 10000
ifHighSpeed.436281344 = Gauge32: 10000
ifHighSpeed.436285440 = Gauge32: 10000
ifPromiscuousMode.83886080 = INTEGER: false(2)
ifPromiscuousMode.436207616 = INTEGER: false(2)
ifPromiscuousMode.436211712 = INTEGER: false(2)
ifPromiscuousMode.436215808 = INTEGER: false(2)
ifPromiscuousMode.436219904 = INTEGER: false(2)
ifPromiscuousMode.436224000 = INTEGER: false(2)
ifPromiscuousMode.436228096 = INTEGER: false(2)
ifPromiscuousMode.436232192 = INTEGER: false(2)
ifPromiscuousMode.436236288 = INTEGER: false(2)
ifPromiscuousMode.436240384 = INTEGER: false(2)
ifPromiscuousMode.436244480 = INTEGER: false(2)
ifPromiscuousMode.436248576 = INTEGER: false(2)
ifPromiscuousMode.436252672 = INTEGER: false(2)
ifPromiscuousMode.436256768 = INTEGER: false(2)
ifPromiscuousMode.436260864 = INTEGER: false(2)
ifPromiscuousMode.436264960 = INTEGER: false(2)
ifPromiscuousMode.436269056 = INTEGER: false(2)
ifPromiscuousMode.436273152 = INTEGER: false(2)
ifPromiscuousMode.436277248 = INTEGER: false(2)
ifPromiscuousMode.436281344 = INTEGER: false(2)
ifPromiscuousMode.436285440 = INTEGER: false(2)
ifConnectorPresent.83886080 = INTEGER: false(2)
ifConnectorPresent.436207616 = INTEGER: true(1)
ifConnectorPresent.436211712 = INTEGER: true(1)
ifConnectorPresent.436215808 = INTEGER: true(1)
ifConnectorPresent.436219904 = INTEGER: true(1)
ifConnectorPresent.436224000 = INTEGER: true(1)
ifConnectorPresent.436228096 = INTEGER: true(1)
ifConnectorPresent.436232192 = INTEGER: true(1)
ifConnectorPresent.436236288 = INTEGER: true(1)
ifConnectorPresent.436240384 = INTEGER: true(1)
ifConnectorPresent.436244480 = INTEGER: true(1)
ifConnectorPresent.436248576 = INTEGER: true(1)
ifConnectorPresent.436252672 = INTEGER: true(1)
ifConnectorPresent.436256768 = INTEGER: false(2)
ifConnectorPresent.436260864 = INTEGER: false(2)
ifConnectorPresent.436264960 = INTEGER: false(2)
ifConnectorPresent.436269056 = INTEGER: false(2)
ifConnectorPresent.436273152 = INTEGER: false(2)
ifConnectorPresent.436277248 = INTEGER: false(2)
ifConnectorPresent.436281344 = INTEGER: false(2)
ifConnectorPresent.436285440 = INTEGER: true(1)
ifAlias.83886080 = STRING: 
ifAlias.436207616 = STRING: port1
ifAlias.436211712 = STRING: 
ifAlias.436215808 = STRING: 
ifAlias.436219904 = STRING: 
ifAlias.436224000 = STRING: 
ifAlias.436228096 = STRING: 
ifAlias.436232192 = STRING: 
ifAlias.436236288 = STRING: 
ifAlias.436240384 = STRING: 
ifAlias.436244480 = STRING: 
ifAlias.436248576 = STRING: 
ifAlias.436252672 = STRING: 
ifAlias.436256768 = STRING: 
ifAlias.436260864 = STRING: 
ifAlias.436264960 = STRING: 
ifAlias.436269056 = STRING: 
ifAlias.436273152 = STRING: 
ifAlias.436277248 = STRING: 
ifAlias.436281344 = STRING: 
ifAlias.436285440 = STRING: 
ifCounterDiscontinuityTime.83886080 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436207616 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436211712 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436215808 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436219904 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436224000 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436228096 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436232192 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436236288 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436240384 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436244480 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436248576 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436252672 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436256768 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436260864 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436264960 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436269056 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436273152 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436277248 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436281344 = Timeticks: (0) 0:00:00.00
ifCounterDiscontinuityTime.436285440 = Timeticks: (0) 0:00:00.00
ifTableLastChange.0 = Timeticks: (6608) 0:01:06.08
ifStackLastChange.0 = Timeticks: (0) 0:00:00.00
  • The interfaces summary from the switch console. 
sw10-xge# show interface brief

--------------------------------------------------------------------------------
Ethernet      VLAN   Type Mode   Status  Reason                   Speed     Port
Interface                                                                   Ch #
--------------------------------------------------------------------------------
Eth1/1        1      eth  access down    Link not connected          10G(D) --
Eth1/2        1      eth  access up      none                        10G(D) --
Eth1/3        1      eth  access up      none                        10G(D) --
Eth1/4        1      eth  access up      none                        10G(D) --
Eth1/5        1      eth  access up      none                        10G(D) --
Eth1/6        1      eth  access up      none                        10G(D) --
Eth1/7        1      eth  access up      none                        10G(D) --
Eth1/8        1      eth  access up      none                        10G(D) --
Eth1/9        1      eth  access up      none                        10G(D) --
Eth1/10       1      eth  access up      none                        10G(D) --
Eth1/11       1      eth  access up      none                        10G(D) --
Eth1/12       1      eth  access up      none                        10G(D) --
Eth1/13       1      eth  access down    SFP not inserted            10G(D) --
Eth1/14       1      eth  access down    SFP not inserted            10G(D) --
Eth1/15       1      eth  access down    SFP not inserted            10G(D) --
Eth1/16       1      eth  access down    SFP not inserted            10G(D) --
Eth1/17       1      eth  access down    SFP not inserted            10G(D) --
Eth1/18       1      eth  access down    SFP not inserted            10G(D) --
Eth1/19       1      eth  access down    SFP not inserted            10G(D) --
Eth1/20       1      eth  access up      none                        10G(D) --

--------------------------------------------------------------------------------
Port   VRF          Status IP Address                              Speed    MTU
--------------------------------------------------------------------------------
mgmt0  --           up     172.16.10.3                             1000     1500

MRTG tweeks for 10GbE

  • There are a few tweeks to be done to the MRTG config when using cfgmaker.
  • The MaxBytes is out of whack.
  • Manually edit the line MaxBytes[sw10-xge_436211712]: 536870911 to MaxBytes[sw10-xge_436211712]: 1250000000
  • The internal interface numbering scheme is also very weird but that depends on the internal SNMP implementation on the switch.
  • The following uses public as the SNMPv2c community name to protect the innocent. 
# Created by 
# /usr/bin/cfgmaker --global "WorkDir: /var/www/mrtg" --global "Options[_]: bits,growright" --output /etc/mrtg/sw10-xge.cfg public@sw10-xge

######################################################################
# System: sw10-xge
# Description: Cisco NX-OS(tm) n5000, Software (n5000-uk9), Version 5.0(2)N2(1), RELEASE SOFTWARE Copyright (c) 2002-2010 by Cisco Systems, Inc. Device Manager Version 5.0(4a),  Compiled 12/18/2010 23:00:00
# Contact: bicadmin@bic.mni.mcgill.ca
# Location: Room-WB212-Rack-B3-U36
######################################################################


### Interface 83886080 >> Descr: 'mgmt0' | Name: 'mgmt0' | Ip: '' | Eth: '30-78-30-30-30-35-37-33-64-34-30-31-38-30' ###

Target[sw10-xge_83886080]: 83886080:public@sw10-xge:::::2
SetEnv[sw10-xge_83886080]: MRTG_INT_IP="" MRTG_INT_DESCR="mgmt0"
MaxBytes[sw10-xge_83886080]: 125000000
Title[sw10-xge_83886080]: Traffic Analysis for mgmt0 -- sw10-xge
PageTop[sw10-xge_83886080]: <h1>Traffic Analysis for mgmt0 -- sw10-xge</h1>
                <div id="sysdetails">
                        <table>
                                <tr>
                                        <td>System:</td>
                                        <td>sw10-xge in Room-WB212-Rack-B3-U36</td>
                                </tr>
                                <tr>
                                        <td>Maintainer:</td>
                                        <td>bicadmin@bic.mni.mcgill.ca</td>
                                </tr>
                                <tr>
                                        <td>Description:</td>
                                        <td>mgmt0  </td>
                                </tr>
                                <tr>
                                        <td>ifType:</td>
                                        <td>ethernetCsmacd (6)</td>
                                </tr>
                                <tr>
                                        <td>ifName:</td>
                                        <td>mgmt0</td>
                                </tr>
                                <tr>
                                        <td>Max Speed:</td>
                                        <td>1000.0 Mbits/s</td>
                                </tr>
                        </table>
                </div>


### Interface 436207616 >> Descr: 'Ethernet1/1' | Name: 'Ethernet1/1' | Ip: '' | Eth: '30-78-30-30-30-35-37-33-64-34-30-31-38-38' ###
### The following interface is commented out because:
### * it is operationally DOWN
# 
# Target[sw10-xge_436207616]: 436207616:public@sw10-xge:::::2
# SetEnv[sw10-xge_436207616]: MRTG_INT_IP="" MRTG_INT_DESCR="Ethernet1/1"
# MaxBytes[sw10-xge_436207616]: 536870911
# Title[sw10-xge_436207616]: Traffic Analysis for 436207616 -- sw10-xge
# PageTop[sw10-xge_436207616]: <h1>Traffic Analysis for 436207616 -- sw10-xge</h1>
#               <div id="sysdetails">
#                       <table>
#                               <tr>
#                                       <td>System:</td>
#                                       <td>sw10-xge in Room-WB212-Rack-B3-U36</td>
#                               </tr>
#                               <tr>
#                                       <td>Maintainer:</td>
#                                       <td>bicadmin@bic.mni.mcgill.ca</td>
#                               </tr>
#                               <tr>
#                                       <td>Description:</td>
#                                       <td>Ethernet1/1 port1 </td>
#                               </tr>
#                               <tr>
#                                       <td>ifType:</td>
#                                       <td>ethernetCsmacd (6)</td>
#                               </tr>
#                               <tr>
#                                       <td>ifName:</td>
#                                       <td>Ethernet1/1</td>
#                               </tr>
#                               <tr>
#                                       <td>Max Speed:</td>
#                                       <td>4295.0 Mbits/s</td>
#                               </tr>
#                       </table>
#               </div>


### Interface 436211712 >> Descr: 'Ethernet1/2' | Name: 'Ethernet1/2' | Ip: '' | Eth: '30-78-30-30-30-35-37-33-64-34-30-31-38-39' ###

Target[sw10-xge_436211712]: 436211712:public@sw10-xge:::::2
SetEnv[sw10-xge_436211712]: MRTG_INT_IP="" MRTG_INT_DESCR="Ethernet1/2"
MaxBytes[sw10-xge_436211712]: 536870911
Title[sw10-xge_436211712]: Traffic Analysis for Ethernet1/2 -- sw10-xge
PageTop[sw10-xge_436211712]: <h1>Traffic Analysis for Ethernet1/2 -- sw10-xge</h1>
                <div id="sysdetails">
                        <table>
                                <tr>
                                        <td>System:</td>
                                        <td>sw10-xge in Room-WB212-Rack-B3-U36</td>
                                </tr>
                                <tr>
                                        <td>Maintainer:</td>
                                        <td>bicadmin@bic.mni.mcgill.ca</td>
                                </tr>
                                <tr>
                                        <td>Description:</td>
                                        <td>Ethernet1/2  </td>
                                </tr>
                                <tr>
                                        <td>ifType:</td>
                                        <td>ethernetCsmacd (6)</td>
                                </tr>
                                <tr>
                                        <td>ifName:</td>
                                        <td>Ethernet1/2</td>
                                </tr>
                                <tr>
                                        <td>Max Speed:</td>
                                        <td>4295.0 Mbits/s</td>
                                </tr>
                        </table>
                </div>

...