I can't get Topology with L3 switch and ether channel to work.

[Moonman94]

Hello.

I have been doing this topology for I don't know how many times I again and I just can't seem to get it work, I've a built a similar(although smaller one) and it worked fine.

I am pretty sure I've did everything, proper channel groups, trunk links, enabling ip routing on L3 switch.

Can any of you please tell me what could be wrong?

Here is output of L3 switch

http://pastebin.com/h5EQYRHL

[paul driver]

Hello

What are the actual issue apart from the port-channels not coming up?

On one side of the PC's set them the PAGP auto or set both to auto and test again

res
Paul

[Paul Chapman · Accepted solution]

Hi -

Do a "show spanning-tree root" on all switches.  Do they all match?

Do a "show vlan brief" on all switches.  Does the list of available VLANs match on all switches? (Not necessarily the port assignments)

Do a "show spanning-tree summary" on all switches.  Do the settings match on all switches?

Do a "show etherchannel summary" on all switches.  Do all the ports show in an up state?

The correct answer to the questions above should be "yes".  If you find a "no", you will need to remediate.

Running 3 links in aggregation is a bad practice as the algorithm uses powers of 2 to divide the traffic among the members.  In a 3 link channel, 1 of the links will end up with an extra portion of the traffic.  So 1, 2, 4, or 8 links is recommended.

PSC

[Moonman94]

Thank you.