Extreme Networks 12802 Redundant MSM Activity BlackDiamond 12804 Switch, MSM LEDs, Color Meaning

BlackDiamond 12800 Series MSMs

Redundant MSM Activity (BlackDiamond 12804 Switch)

The BlackDiamond 12804 switch can operate with a single MSM installed, providing full bandwidth with this single MSM. When you install a second 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. The MSMs in the BlackDiamond 12804 switch are not load sharing. MSM(A) or MSM(B) handles packets while the other MSM is idle.

When you save the switch configuration, it is saved to all MSMs.

Selection of the primary MSM occurs automatically. The following examples describe the selection process:

●When a BlackDiamond 12804 switch boots with two MSMs installed, the MSM in slot 3/A becomes the primary.

If a switch is operating with one MSM and a second 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 network services.

●If you remove the primary MSM while the switch is operating, the secondary MSM performs a soft reset and then becomes the primary MSM.

For example, if you have a BlackDiamond 12804 switch with a primary MSM in slot 3/A and a secondary MSM in slot 4/B, and you remove the primary MSM from slot 3/A, the secondary, or backup, MSM in slot 4/B becomes the primary.

MSM LEDs

Table 5 describes the LED activity on the BlackDiamond 12800 series MSMs.

Table 5: BlackDiamond 12800 Series MSM LEDs

LED	Color	Meaning
SYS	Green blinking	Normal operation.
	Amber blinking	Diagnostic tests are running on the module. The LED resets if the
		diagnostics are terminated. The LED returns to blinking amber if
		another diagnostic test is started.
	Amber steady	Diagnostic failure has occurred.
	Off	Switch is not receiving power.
MSTR	Green steady	Module is operating as primary MSM.
	Amber	Module is operating as secondary, or backup, MSM.
	Green blinking	Power-on self-test (POST) is running.
	Off	Normal operation for diagnostics.
ERR	Amber	A critical software error has been logged since power-up.
	Off	Normal operation.
ENV	Green	Environment (temperature, fan, power supply) is operating properly.
	Amber	Environmental failure has occurred.

BlackDiamond 12800 Series Switches Hardware Installation Guide 21