Nortel has released software 3.7.4 for the Ethernet Switch 460 and Ethernet Switch 470. You’ll probably recall that Nortel pulled the 3.7.3 software release in May 2009 after several software memory leaks were discovered.
I should point out that you can’t just load 3.7.4 software if you are running software older than 3.5.4. You must upgrade the software in steps. Here’s the different versions that you need to step through; 2.x to 2.5 to 3.0 to 3.2.1 to 3.5.4 to 3.7.4.
Also of interest in the release notes is a comment regarding VLACP;
VLACP operation has been changed to match implementation on ERS modular and other stackable platforms with the latest software releases. A link for which VLACP is configured will remain in a blocked state until partnership is correctly formed with the VLACP partner (Q01799355).
I’m not sure what difference they are referring to… the wording makes it sound as though VLACP would initial start in forwarding mode and would only block the port once the timeout and retries had reached the configured threshold. I might need to dig a little deeper just out of curiosity.
You can find the release notes here.