Extreme Networks Summit WM Maintenance Manual page 33

Table 3: Availability pair (Continued)
Controller 1
WM20
NOTE
The two Summit WM Controllers in "Availability" pair must be running the same version of the software.
For the ease of understanding, this section is explained with the help of the following hypothetical
scenario:
The upgrade is to be carried out on the two controllers – WM-1 and WM-2.
●
Both the controllers are operating in "Availability" mode.
●
Both are running V4R1 release.
●
Each controller has two APs. WM-1 has AP-1 and AP2 whereas WM-2 has AP-3 and AP-4.
●
AP-1 and AP-2 are configured as 'Local' on WM-1 and 'Foreign' on WM-2.
●
AP-3 and AP-4 are configured as 'Local' on WM-2 and 'Foreign' on WM-1.
●
The following is the graphical illustration of the upgrade process in the aforesaid hypothetical situation:
Figure 3: Graphical illustration of the upgrade process for the two controllers in 'Availability' mode
Summit WM Maintenance Guide, Software Version 5.3
Controller 2
WM1000
33