Stack Duplicate Base Unit Protection; Multicast Behavior - Avaya Virtual Services Platform 7000 Series Troubleshooting Manual

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Important:
For AUR to function properly, the new unit and the existing units in the stack must all run at
least Release 10.1 agent and diagnostic software versions.
The VSP 7000 Series also supports the Agent Auto Unit Replacement (AAUR) enhancement to
AUR.
AAUR
AAUR ensures that all switch units in a stack have the same software image by inspecting units that
join a stack and downloading the agent software image to any unit that has a dissimilar image.
AAUR is enabled by default.
For more information about AUR and AAUR, see Getting Started with Avaya Virtual Services
Platform 7000 Series, NN47202–303.

Stack duplicate base unit protection

You can add a switch unit, with the base unit switch enabled, to an operational stack without
affecting the operational integrity of the stack.
If you add a new or replacement unit, with the base unit switch enabled, to a stack, the added unit
runs in standalone mode, and is ignored by the stack. Both the new unit and the stack base unit
generate a log message indicating this action.
If an operational stack is running in temporary base mode, the stack accepts any new unit,
regardless of the base unit switch position. (The only limitation is that the stack cannot exceed eight
units.)
Note:
If you add a new or replacement unit, with the base unit switch enabled, to a stack, AAUR does
not download the image from the stack to the added unit. Avaya recommends that you disable
the base unit switch on new or replacement stack units.
Important:
If you power cycle a stack and there is more than one unit with the base unit switch enabled, the
stack will not form after reboot, even if the stack was operational before the reset.

Multicast behavior

You can use Internet Group Management Protocol (IGMP) snooping to selectively forward multicast
traffic only to ports where particular IP multicast streams are expected. The switch can identify those
ports by snooping for IGMP communication between routers and hosts.
Troubleshooting Avaya VSP 7000 Series
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Comments on this document? infodev@avaya.com
July 2015