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Filtering IP printing Traffic and its % ( How To )

The following question is kind of a more of HOW TO, and how I would approach gathering this information.

I am trying to find out how to gather only IP printing traffic to ultimately decipher how much printing traffic goes through a specific Fast Ethernet Interface in our catalyst 6500 switch.

We have about 80 printers in one building, lets call it BuildingA-Boston. Print servers are in a centralize remote location buildingB-New-York.

Building-A LAN is designed with Dual-Core architecture using Catalyst 6505 switches as our distributed layer and about 7 4000 series switches for the access layer and their respective VLANS.

The Wide Area is handle by a 7507 Cisco router with a T3 pipe connecting to the remote site for file and print services. Users are complaining of slowness for IP printing services, and of course, they 1st question at the network before they question the servers. Obviously printing will be slower since these services have to go across WAN links instead of having Print-Servers local.

By looking the Fast Ethernet interface on the router I find that it has no problems, and the fast Ethernet average utilization stats reported by Vital-Net is less than 15% with no errors reported.

FastEthernet1/0/0 is up, line protocol is up

Hardware is cyBus FastEthernet Interface, address is 0009.e911.c020 (bia 0009.e911.c020)

Description: backone#1 Port 4/11 Vlan 102

Internet address is 0.0.0.0/24

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 100Mb/s, 100BaseTX/FX

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:00:00, output 00:00:00, output hang never

Last clearing of "show interface" counters 4w1d

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops

5 minute input rate 24000 bits/sec, 11 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

54200534 packets input, 3355035712 bytes, 0 no buffer

Received 977910 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog

0 input packets with dribble condition detected

30577638 packets output, 1883723650 bytes, 0 underruns

0 output errors, 0 collisions, 4 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

My question is, how can I gather IP printing traffic going throught the FastEthernet interface on the switch and come up with a % figure for IP printing. A sniffer would not do me any good.

Any Hints ?

Thanks

Jorge Rodriguez

1 REPLY
New Member

Re: Filtering IP printing Traffic and its % ( How To )

The IP traffic on the fastethernet can be monitored using the Switched Port Analyser(SPAN). More details on how to configure SPAN and other stuff is available on:

Configuring the Catalyst Switched Port Analyzer (SPAN) Feature

http://www.cisco.com/warp/public/473/41.html#456

Hope this helps.

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