Hi,Can anyone point me to the documentation where it says that Cisco IOS-XR on CRS-1 supports a true in-service-software-upgrades (ISSU)?
I've been looking on CCO but all they talk in IOS XR is ISSU where they patch a code and things like that. What I'm looking is to upgrade a CRS-1 to a new software image with a subsecond outage. This means upgrading the control plane and line cards with the new software images with subsecond outage. Not just a specific software module or a line card but the whole system to upgrade between two major releases. I assume that non stop routing (not forwarding) would be a prerequisite for this, but it seams that they support NSR only for ISIS. NSR implies statefull failover where all protocol states/transactions are mirrored and synched between two routing engines. For example, BGP TCP sessions stays the same during the routing engine failover. Thanks, Marlon _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
