Ethernet Fabric (VDX, CNA)

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Occasional Contributor
Posts: 13
Registered: ‎09-24-2015
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Interface port-channel 2 is link down

On Brocade VDX 6740  I got an error "Interface port-channel 2 is link down"  as one of the interfaces in the port-channel went down. Does the error mean that port-channel as a whole is down or just one of the link/interface is down?

 

If it means port-channel is down, why would a port-channel go down if only one of link is down when other links/interfaces are still up?

 

Thanks,

Brocade Moderator
Posts: 135
Registered: ‎06-30-2010

Re: Interface port-channel 2 is link down

Hi,

 

If you have two or more VDX switches forming a port channel this then becomes a vLAG

 

If you are looking at the log of an individual VDX switch when an interface goes down which is a member of a vLAG and this is the only member interafce on that switch then you will see message to say that the physical interface and the port-channel interface are down.  This only means that the local interface and member of the port channel is down.  This does not mean that the whole port-channel (vLAG) is down

 

If you look at the log of the other switch you should also see a message something like the following:

 

RBridge ID xx has left Port-channel xx. Port-channel has only RBridge ID xx and is no longer a vLAG.

 

Hope this helps

 

Regards

Mick


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