[c-nsp] issu on ios-xr

[Marlon Duksa]

Hi - does IOS-XR supports STATEFUL switchover of control plane? There is a
bunch of reference to this (RSP SSO, NSF, NSR, Gracefull Restart) but it is
not clear to me simply whether are protocol states replicated to the standby
RSP?

I'm not looking for GR protocol extensions in conjunction with NSF to
provide control plane redundancy but rather a true state replication. For
example if BGP goes down, the TCP session will never be broken between the
peers.

If this is supported, how is it called in Cisco's terms?  I don't think it
is called RSP SSO as they still refer to RSP SSO + NSF as a mean to provide
redundancy based on GR protocol extensions?

Thanks,
Marlon