It would seem that Nortel has discovered some serious flaws in software 18.104.22.168 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 22.214.171.124 software“.
CPU instability issues with Maintenance Release (MR) 126.96.36.199 have been discovered during initial deployment. CPU crash dump events leading to system instability have been reported after the operational SW was upgraded to 188.8.131.52 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 184.108.40.206 software code that might result in a CPU crash on the ERS 8600.
Nortel is advising that 220.127.116.11 software has been pulled from their website and replaced with 18.104.22.168 software. They are also advising that 22.214.171.124 software will be available in August 2008.
While I haven’t personally seen this problem I only have 1 switch running 126.96.36.199 software out of the 37 ERS 8600 switches we have in production.