Matrix N-Series DFE, firmware 6.01.01.0020 and higher
It is always recommended to read the release notes and to save the configuration (5035), before performing a firmware upgrade (5040). This provides the most accurate expectation of what will likely be encountered upon upgrade, and also permits a ready recovery should some element of the configuration be unexpectedly modified or missing as a result of the upgrade.
This "best practice" guideline is even more important when upgrading to firmware version 6.x (6.01.01.0020 or higher), which implements a number of potentially high-profile changes. High availability, VRRP, router MAC address, router memory requirements, SNMP router contexts, system login, and DHCP limits are among the many topics discussed in the release notes.
6.x firmware represents a large-scale change in the way we deploy high availability at Layer 3 in the N-Series. There is now a maximum of one logical router instance rather than two, and any slot can become the router. If there is a DFE Diamond in the system, that will default to being the router before a DFE Platinum will. The slot running router services can be determined by means of the 'show router' command ("Router Services are currently running on module x").
Thought should be given to how a two-router chassis (e.g. 'router 1' and 'router 2') will work after it is converted to a one-router chassis (i.e. 'router'):
- Any VRRP redundant gateway protocol running on the two routers for slot redundancy is no longer needed for high availability, and should be removed from the configuration either before or after upgrade (9964).[list]