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New Member

4232-L3, line protocol is down on router side port-channel1.2

I am trying to config a 4232-L3. Here is what I did:

router>

int gig3

no ip add

channel-group 1

int gig 4

no ip add

channel-group 1

int port-channel 1

.....

int port-channel1.1

.....

int port-channel1.2

encap dot1q 2

ip add XXXX

switch>

#port channel

set port channel 5/1-2 100

#module 5:

set vlan 2 5/10

set trunk 5/1 none dot1q 1-1005

set trunk 5/2 none dot1q 1-1005

set port channel 5/1-2 mode on

end

Refer to the last line of configureation on switch. When the port channel is confiured as " on mode", the line protocol is down for router's port-channel 1.2, but port-channel 1.1 is "up up".

If you leave the mode as off. Both port-channel 1.1 and port-channel 1.2 on the router side show "up and up".

Based on a cisco Doc, the port channel should be leave at on mode!

So, what is wrong with this config?

TIA

3 REPLIES
Cisco Employee

Re: 4232-L3, line protocol is down on router side port-channel1.

I just tested in the lab with your configs and did not have any issues with any port-channel sub-interfaces. I suggest that you open a TAC case or email me output of "sh tech" from both the Sup and the L3 blade

Regards,

-Prashanth

Cisco Employee

Re: 4232-L3, line protocol is down on router side port-channel1.

The correct way is on. Make sure you have at least one port in vlan 2 that is connected to something. If there is nothing in a vlan, it will be down. Vlan 1 is up because you have an address on sc0 that defaults to vlan 1

New Member

Re: 4232-L3, line protocol is down on router side port-channel1.

Thanks for the help. After connecting at least one port in a vlan, I got UP/UP......

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