Configuring Msdp Basic Functions - Huawei Quidway S5600 Series Operation Manual

Operation Manual – Multicast Protocol
Quidway S5600 Series Ethernet Switches-Release 1510
RP2), the receiver accepts the SA message and forwards the message to other
peers.
2) If an RP has only one MSDP peer (for example, when RP2 sends an SA message
to RP1), the receiver accepts the SA message from the peer.
3) If an SA message comes from a static RPF peer (for example, when RP4 sends an
SA message to RP5), the receiver accepts the SA message and forwards it to
other peers.
4) If an SA message comes from a peer that belongs to the same MSDP mesh group
with the receiver, the receiver accepts the SA message and forwards it to peers
out of the mesh group. For example, when RP2 sends an SA message to RP4,
RP4 accepts the message and forwards it to RP5 and RP6.
5) If an SA message comes from an MSDP peer in the same AS, and this peer is the
next hop on the optimal path to the RP in the PIM-SM domain where the multicast
source resides, the receiver accepts the SA message and forwards it to other
peers. For example, when RP4 sends an SA message to RP5, RP5 receives the
message and forwards it to RP6.
6) If an SA message comes from an MSDP peer in a different AS, and this AS is the
next AS of the RP optimal path in the PIM-SM domain where the multicast source
resides (for example, when RP4 sends an SA message to RP6), the receiver
accepts the SA message and forwards it to other peers.
7) The receiver does not accept or forward other SA messages.
Note:
S5600 series switches do not support inter-domain routing (BGP protocol), so the fifth
rule described above is adopted in RPF check.

8.2 Configuring MSDP Basic Functions

To enable exchange of information from the multicast source S between two PIM-SM
domains, you need to establish MSDP peering relationships between RPs in these
PIM-SM domains, so that the information from the multicast source can be sent through
SA messages between the MSDP peers, and the receivers in other PIM-SM domains
can finally receive the multicast source information.
A route is required between two routers that are MSDP peers to each other. Through
this route the two routers can transfer SA messages between PIM-SM domains. An
area containing only one MSDP peer, known as a stub area, the route is not compulsory.
SA messages are transferred in a stub area through the configuration of static RPF
peers. In addition, the use of static RPF peers can avoid RPF check on the received SA
messages, thus saving resources.
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8-6
Chapter 8 MSDP Configuration