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Map Traffic over GE links with Etherchannel in 4500 platform

Hi,

Does anybody have experience with the command "show platform software etherchannel..." over 4500s?

For instance:

sw#sh platform software etherchannel port-channel 3 map ip 10.1.1.1 10.1.1.3

Map port for Ip 10.1.1.1, 10.1.1.3 is Gi3/3(Po3)

NOTE: Software forwarded traffic will use Gi3/1(Po3)

We are concerned about the "Software Forwarded Traffic". One could think that is related to CPU forwarded traffic (L2 control traffic eg, CDP, PAgP, etc etc).

However in some tests we are suspecting that ICMP traffic is passing through that link instead of the the link mentioned as "map port" (ICMP traffic not originated nor received at the switch).

Is this command 100% reliable ?

Thanks

1 REPLY
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Re: Map Traffic over GE links with Etherchannel in 4500 platform

You can use the following command to verify which type of traffic (source/destination,

mac/ip/l4-port) would select which member port within etherchannel.

show platform software etherchannel port-channel map mac

ex :

Cat4507#$e etherchannel port-channel 2 map mac 0000.0000.0000 1111.1111.1111

Map port for mac 0000.0000.0000, 1111.1111.1111 is Fa4/48(Po2)

NOTE: Software forwarded traffic will use Fa4/48(Po2)

Use the above command for a channel that is up.

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