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10. L2 Querier behavior for an SMLT switch
cluster
For C-VLANs running in an SMLT environment, the IST ports are not part of the VLAN. In that situation,
IGMP on a C-VLAN behaves as follows to account for the fact that IST peers do not see each other's
Membership Queries:
•
The SMLT master is responsible for sending the queries out all SMLT and non-SMLT ports on
SPB access.
•
The SMLT slave only sends out queries on its non-SMLT ports. This includes SMLT ports whose
remote ports are down (SMLT state of 'norm').
•
This results in two queriers existing within the C-VLAN. Having two queriers poses no problems in
this environment, as any SMLT access devices will see the SMLT master as the querier, and
non-SMLT access devices will see the directly connected IST peer as the querier. Non-SMLT
access devices connected on either side of the IST peers can talk to each other via the SPB
cloud.
11. Considerations when connecting a SPB
Multicast Network to a PIM Network
As mentioned previously, the current implementation does not integrate PIM functionality, so the following
considerations apply when connecting to a PIM network:
•
Static IGMP receivers must be configured on the BEB access interface facing the PIM network
when the sender is on the SPB access network and the receiver is on the PIM network.
The PIM Router needs to have a configuration option to accept streams with non-local
sources or else packets will be dropped.
NOTE: This capability with PIM is not currently supported on ERS 8800.
•
Static IGMP receivers must be configured on the PIM interface facing the SPB Multicast network
when the sender is on the PIM network and the receiver is on the SPB access network.
IGMP Access filters should be configured on the BEB facing the PIM network for security,
to limit unnecessary multicast streams from being injected into the SPB domain.
March 2013
Avaya Inc. – External Distribution
avaya.com
141
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