VSS etherchannel mode?

[Erik Ingeberg]

Hi,

I'm configuring a pair of 6509 switches in VSS mode, and there are a number of dual homed etherchannel links (MEC) connecting to different routers, switches and servers. I plan to use a single GigabitEthernet link directly connected to both switches for fast-hello dual active detection.

I have been using "mode on" in the etherchannel configuration for all links. Are there any disadvantages to "mode on" comparing with LACP or PAgP in VSS mode?

[Reza Sharifi]

Hello Pluppo,

Mode on is only recommended for the VSL links (The links between the 2 switch). Desirable is the recommended mode by Cisco for other links like MEC.

Please refer to this document for more info:

http://www.cisco.com/en/US/docs/solutions/Enterprise/Data_Center/DC_3_0/DC-3_0_IPInfra.html#wp1044715

HTH

Reza