It would seem that Nortel has discovered some serious flaws in software 22.214.171.124 for the Nortel Ethernet Routing Switch 8600. Nortel published a bulletin today entitled, “Ethernet Routing Switch (ERS) 8600: System Instability maybe seen after upgraded to 126.96.36.199 software“.
CPU instability issues with Maintenance Release (MR) 188.8.131.52 have been discovered during initial deployment. CPU crash dump events leading to system instability have been reported after the operational SW was upgraded to 184.108.40.206 at different customer site.
There was also an additional note concerning an interaction between Microsoft’s Network Load Balancing (NLB) when running in multicast mode on 220.127.116.11 software code that might result in a CPU crash on the ERS 8600.
Nortel is advising that 18.104.22.168 software has been pulled from their website and replaced with 22.214.171.124 software. They are also advising that 126.96.36.199 software will be available in August 2008.
While I haven’t personally seen this problem I only have 1 switch running 188.8.131.52 software out of the 37 ERS 8600 switches we have in production.