4500X VSS - Dual Active Detection with ePAgP

[ngtransge]

Hello,

I am interesting if 3560x supports ePAgP. I have VSS which is formed by two 4500x switches. Can I use 3560x, which is connected two both VSS members via 10Gb optics for Dual Active detection ?

[Leo Laohoo]

ePAgP

If I remembered correctly, ePAgP was developed solely to improve the mechanics for VSS.  So only VSS-capable appliances/chassis can support this. 

[InayathUlla Sharieff · Accepted solution]

Hi,

As PagP is not supported accross differents 3750(-X) units of a stack (but LACP yes), ePagp is not supported also. The MEC has to be formed from the same 3750(-X) unit / Standalone 35xx and 37xx do support PAgPand thus ePAgP.

Page 17 and 20 of http://www.cisco.com/web/DK/assets/docs/presentations/VSS_0109.pdf =>

"Since cross-stack EtherChannel does not support PAgP, it can not use enhanced PAgP for dual ACTIVE detection.

Hence the only alternative for cross-stack EtherChannel configuration is to use BFD as a dual ACTIVE detection method"

Hope it helps.

Regards;

Inayath

[MARVIN SPITERI]

hi is there any update for the ePAGP support on 3750-x stack running latest IOS pls ?

I could not find in release notes