Hitless Failover Caveats; Understanding Power Supply Management - Extreme Networks ExtremeWare XOS Guide Manual

Managing the Switch
Table 12: Platform support for hitless failover
Platform
BlackDiamond 10K
BlackDiamond 10K
BlackDiamond 10K
BlackDiamond 10K
BlackDiamond 8800 family
BlackDiamond 8800 family
BlackDiamond 8800 family
BlackDiamond 8800 family
BlackDiamond 8800 family

Hitless Failover Caveats

This section describes the caveats for hitless failover. Please check the latest version of the ExtremeWare
XOS release notes for additional information.
Caveats for All Modular Switches
The following is a summary of hitless failover caveats for all modular switches:
A brief traffic interruption (less than 1/2 of a second) can occur when the failover happens due to
●
reprogramming of the I/O modules to bypass the original primary MSM's switch chips.
There is a 50% reduction in backplane bandwidth during a failover.
●
Caveats for the BlackDiamond 8800 Family of Switches
The following is a summary of hitless failover caveat s for only the BlackDiamond 8800 family of
switches:
MSM I/O ports on the original primary MSM are not available during the failover and this
●
MSM I/O subsection is power cycled. It takes about 2 minutes for these MSM I/O ports to be able to
pass traffic again.
I/O modules not yet in the Operational state are powered off and the card state machine is restarted
●
to bring them to the Operational state. This results in a delay in the I/O module becoming
Operational.

Understanding Power Supply Management

This section describes how ExtremeWare XOS manages power consumption on the switch and contains
the following topics:
Using Power Supplies—Modular Switches Only on page 79
●
Using Power Supplies—Summit X450 Switch Only on page 81
●
Displaying Power Supply Information on page 82
●
78
Protocol
ESRP
OSPF graceful restart
Network login
STP
ESRP
Network login
OSPF graceful restart
PoE
STP
ExtremeWare XOS Version
ExtremeWare XOS 11.0
ExtremeWare XOS 11.3
ExtremeWare XOS 11.3
ExtremeWare XOS 11.0
ExtremeWare XOS 11.3
ExtremeWare XOS 11.3
ExtremeWare XOS 11.3
ExtremeWare XOS 11.3
ExtremeWare XOS 11.3
ExtremeWare XOS 11.3 Concepts Guide