Extreme Networks BlackDiamond 10808 Installation Manual page 119

If you are using only one G8X MSM in the BlackDiamond 8810 switch, install that MSM in slot 5. If you
want to use two MSMs to increase reliability and throughput, install the second MSM in slot 6.
See "Installing BlackDiamond 8810 MSM and I/O Modules" on page 128
install a G8X MSM.
The G8X MSM has eight SFP fiber mini-GBIC data ports. These ports operate the same as the ports on
the G24X (see "G24X Module" on page 122
The eight data ports are integrated into the MSM and managed by a separate I/O processor. This I/O
subsystem CPU on the G8X MSM retains control of the eight Ethernet ports on the MSM during a
failover. The backup MSM can take control of the ports.
The BlackDiamond 8810 switch can run with a single MSM installed. When you install an additional
MSM, one of the MSMs operates as the primary, and the other becomes the secondary or backup.
The primary MSM is responsible for upper-layer protocol processing and system management
functions. Packet handling is distributed among the CPUs of all installed MSMs.
When you save the switch configuration, it is saved to all MSMs.
Selection of the primary MSM occurs automatically. The following scenarios describe the selection
process:
When the BlackDiamond 8810 switch boots with two MSMs already installed, the MSM in slot 5
becomes the primary.
If an additional MSM is added to the switch after it has been powered-up, the added MSM becomes
the secondary. MSMs that operate as secondary, or backup, MSMs can be inserted and removed
without disrupting the network services.
If you remove the primary MSM while the BlackDiamond 8810 switch is operating, the secondary
MSM experiences a soft reset and then becomes the primary MSM.
For example, if you have a BlackDiamond 8810 switch with a primary MSM in slot 5 and a
secondary MSM in slot 6, and you remove the primary MSM from slot 5, the secondary, or backup,
MSM in slot 6 becomes the primary.
for more information on these ports).
for information on how to
119