Problem with 4500E VSS on standby switch

[jphvpichi]

Hi,

I have created a 4500 VSS with two 4507E+R each one with one SUP8, with 3.6.3 version.

I have enterprises services license.

My issue is that if a connect for example a switch to the standby switch i have several lost pings to that switch, another example would be i have several switches connected to the VSS using an etherchannel, one connection to the active switch and another to the standby, evertything is working perfect, but it i disable the connection to the active switch, i have lost pings to those switches (i have tested a few), but with the active switch everything works perfectly.

Does anybody know what it could be?, do you think i am hitting on a bug.

best regards,

Juan Pablo

[Leo Laohoo]

3.6.3 is a very, very old IOS. I'd recommend upgrading, to the latest 3.6.X, and see if there are any improvements.

[jphvpichi]

Hi Leo,

thanks for your reply,

i think i'll go with your sugestion, that was my first option...

best regards,

[Philip D'Ath]

If loosing a few pings is an issue I would switch to using LACP fast rate (assuming your other switch supports it as well).

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/XE3-7-0E/15-23E/configuration/guide/xe-370-configuration/channel.html

[jphvpichi]

Hi Philip,

thanks for your reply..

but the issue also appears if one switch has only one connection to the vss standby switch, without LACP, (or any etherchannel protocol).

best regards