Brocade BigIron RX Series Configuration Guide - Manual (Page 787)

BigIron RX Series Configuration Guide 709
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Configuring MSDP mesh groups
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FIGURE 104 Example of MSDP mesh group
PIM Sparse Domain 1 in Figure 104 contains a mesh group with four RPs. When the first RP, for
example, RP 206.251.21.41 (which is also the originating RP), receives an SA message from the
source, it sends the SA message to its peers within the domain, but the peers do not send the
message back to the originator RP or to each other. The RPs then send the SA message to their
peers in other domains.The process continues until all RPs within the network receive the SA
message. RPs send join and prune messages to appropriate points on the multicast tree towards
the originating RP.
Configuring MSDP mesh group
To configure an MSDP mesh group, enter commands such as the following on each device that will
be included in the mesh group.
BigIron RX(config)# router msdp
BigIron RX(config-msdp-router)# msdp-peer 163.5.34.10 connect-source loopback 2
BigIron RX(config-msdp-router)# msdp-peer 206.251.21.31 connect-source loopback 2
BigIron RX(config-msdp-router)# msdp-peer 206.251.17.31 connect-source loopback 2
BigIron RX(config-msdp-router)# msdp-peer 206.251.13.31 connect-source loopback 2
BigIron RX(config-msdp-router)# mesh-group GroupA 206.251.21.31
BigIron RX(config-msdp-router)# mesh-group GroupA 206.251.17.31
BigIron RX(config-msdp-router)# mesh-group GroupA 206.251.13.31
BigIron RX(config-msdp-router)# exit
RP RP RP
PIM Sparse Domain 2 PIM Sparse Domain 3 PIM Sparse Domain 4
RP 206.251.19.31 RP 206.251.20.31
RP 206.251.18.31 RP 206.251.21.31
206.251.14.22
Source for Group
232.1.0.95
Designated Router (DR)
1. DR receives traffic
from source and registers
source with RP
2. RP sends an SA message
to its peers within the domain
PIM Sparse Domain 1
Mesh GroupA
3. RPs within the domain receive
the SA message and floods the
SA message to its peers in
other PIM Sparse domains