[c-nsp] CSM FT failover behavior

[James Sneeringer]

We have a pair of 6509's running 12.1(27b)E1 native mode, each with a CSM
running 4.2(6) in FT mode.

Can anyone comment on the behavior of the CSMs during failover? In the
section on doing a "hitless upgrade" in the CSM 4.2 Configuration Guide[1],
it's described as not resulting in any "major service interruption", which I
take to mean that there could still be some noticeable affect of failing
from one CSM to the other.

All of our vservers replicate connection and sticky information. Can I
expect something simple like an HTTP session to survive the failover
process?

-James

[1]
http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/csm/4.2.
x/configuration/guide/redun.html#wp1046227