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Webcast-Catalyst9k
New Member

port channel as a layer 3 interface

I have just inherited a very complex network and noticed in the config, for a cat-6513 with layer 3, the following:

interface Port-channel34

ip address 10.20.4.10 255.255.255.252

What would be a rationale for making a port-channel a layer 3 port?

thanks.

4 REPLIES

Re: port channel as a layer 3 interface

Have you ever configured a multilink ppp interface?

Vlad

Blue

Re: port channel as a layer 3 interface

in the case of a portChannel as an L3 entity, it allows for the added capacity/redundancy of the link as well as provides the layer 3 topology either wanted or in some instances, required, such as when you need to make a multilink connection to a router from your switch.

or perhaps you have a routed core infrastructure created in your L3 environment and you wish to increase the capacity of the links between devices without using VTP/trunking.

New Member

Re: port channel as a layer 3 interface

Thanks for your response. Would it be possible to point me to a doc discussing this feature? Thanks again

Re: port channel as a layer 3 interface

Hi greg,

See the following link for configuration of layer 3 etherchannels

http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_guide_chapter09186a008007e6d3.html#wp1020478

HTH

Narayan

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