05-21-2014 02:35 PM - edited 03-07-2019 07:30 PM
I converted a set of switches last night (3650-lan base 12.2) to a new stack of qty 2 - 2960s (IOS 15 latest) with flexstack on them. They are connecting to a UCS 200 running CUCM and Unity, managed by VMWare w/o Virtualcenter. For whatever reason I had issues when I had the ports on different switches that were connected with flexstack (meaning when I had one port on 1/0/30 and another on 2/0/30 it would fail). When I put the ports onto one physical switch it worked fine.
Reading through the documentation I see that there are some issues with pagp and possibly lacp on multiple switches in a stack.
Can someone recommend a channel-mode for the port channels' configuration that will make it work across two physical switches? Seems dumb to use a flexstack if I can't break the load between both switches in case something happens.
Solved! Go to Solution.
09-14-2014 04:58 PM
Hi,
You can only use LACP or MODE ON channelling if you need to use
ports from different switches,
PAGP will NOT operate through the stacking elements
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_55_se/configuration/guide/scg_2960/swethchl.html#wp1275503
Regards
Alex
09-14-2014 04:58 PM
Hi,
You can only use LACP or MODE ON channelling if you need to use
ports from different switches,
PAGP will NOT operate through the stacking elements
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_55_se/configuration/guide/scg_2960/swethchl.html#wp1275503
Regards
Alex
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