Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Traffic pattern L3 switch link

We need to know the destination traffic pattern (not protocol only subnest) on a particular L3 routed  port on the 4900 series switch.

Traffic source subnets are known, there are few destinations subnets and rest all is internet. ( default )

What we need to know is traffic for each destination subnets that is indirectly each location.

As this switch is not supporting  the netflow commands ( and NBAR) what we could collect with NMS is the total utilization of the intercace.

This is not giving us the required infromation - (traffic per destination).

Is there any way to find out the traffic pattern?

Can we apply "permit" access list on this interface and then check the hits to see the highlevel pattern of the traffic.

Using wireshark was also one option but that will collect too much of data.

show version of the switch is given below.

Please share the experience.

#sh version

Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500e-ENTSERVICESK9-M),  Version 12.2(46)SG, RELEASE SOFTWARE (fc1)

Technical Support:

Copyright (c) 1986-2008 by Cisco Systems, Inc.

Compiled Fri 27-Jun-08 19:07 by prod_rel_team

Image text-base: 0x10000000, data-base: 0x124746C0

System image file is "bootflash:cat4500e-entservicesk9-mz.122-46.SG.bin"

cisco WS-C4900M (MPC8548) processor (revision 2) with 524288K bytes of memory.

Processor board ID JAE130316SO

MPC8548 CPU at 1.33GHz, Cisco Catalyst 4900M

Last reset from PowerUp

3 Virtual Ethernet interfaces

36 Gigabit Ethernet interfaces

16 Ten Gigabit Ethernet interfaces

511K bytes of non-volatile configuration memory.



New Member

Traffic pattern L3 switch link


Unfortunately you are right:

Netflow is not supported on Supervisor Engine 6-E and:

To use the NetFlow feature, you must have the Supervisor Engine V-10GE (the functionality is embedded in the supervisor engine), or the NetFlow Services Card (WS-F4531) and either a Supervisor Engine IV or a Supervisor Engine V.

So if you cannot use Netflow and SPAN is not an option (due to high traffic/load), the only

option left is RMON:



CreatePlease to create content