Pim Network With Non-Pim Interfaces - Avaya 8800 Planning And Engineering, Network Design

Multicast network design

PIM network with non-PIM interfaces

For proper multicast traffic flow in a PIM-SM domain, as a general rule, enable PIM-SM on all
interfaces in the network (even if paths exist between all PIM interfaces). Enable PIM on all
interfaces because PIM-SM relies on the unicast routing table to determine the path to the RP, BSR,
and multicast sources. Ensure that all routers on these paths have PIM-SM enabled interfaces.
Figure 101: PIM network with non-PIM interfaces
situation. If A is the RP, then initially receiver R receives data from the shared tree path (that is,
through switch A).
If the shortest path from C to the source is through switch B, and the interface between C and B
does not have PIM-SM enabled, then C cannot switch to the SPT. C discards data that comes
through the shared path tree (that is, through A). The simple workaround is to enable PIM on VLAN1
between C and B.
Figure 101: PIM network with non-PIM interfaces
June 2016
on page 212 provides an example of this
Planning and Engineering — Network Design
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