On Thu, 8 Nov 2012, Phil wrote:
The major vendors have figured it out for the most part by moving to
stateful synchronization between control plane modules and implementing
non-stop routing.
NSR isn't ISSU.
ISSU contains the wording "in service". 6 seconds of outage isn't "in
service". 0.5 seconds of outage isn't "in service". I could accept a few
microseconds of outage as being "ISSU", but tenths of seconds isn't in
service.
The main remaining hurdle is updating microcode on linecards, they still
need to be rebooted after an upgrade.
... and as long as this is the case, there is no ISSU. There is only
"shorter outages during upgrade compared to a complete reboot".
--
Mikael Abrahamsson email: swm...@swm.pp.se
