QTECH QSW-8300 Инструкция по настройке - Manual (Page 228)

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Switch(router-msdp)#mesh-group QTECH -1
28.4.8 MSDP Troubleshooting
When MSDP is being configured, it may not function because of the physical link not working
or configuration mistakes. Attention should be paid to the following items in order to make
MSDP work:
Make sure the physical link works well
Make sure inner-domain and inter-domain routing works
Make sure PIM-SM is applied in every domain as the inner-domain routing protocol, and
configuration for PIM-SM works well
Make sure MSDP is enabled, and the link status of the MSDP enabled Peer is UP
Use the command show msdp global to check whether the MSDP configuration is correct
If the MSDP problems cannot be solved through all the methods provided above, please issue
the command debug msdp to get the debugging messages within three minutes, and send
them to the technical service center of our company.
28.5 ANYCAST RP Configuration
28.5.1 Introduction to ANYCAST RP
Anycast RP is a technology based on PIM protocol, which provides redundancy in order to
recover as soon as possible once an RP becomes unusable.
The kernel concept of Anycast RP is that the RP addresses configured all over the whole
network exist on multiple multicast servers (the most common situation is that every device
providing ANYCAST RP uses LOOPBACK interface, and using the longest mask to configures
RP addresses on this interface), while the unicast routing algorithm will make sure that PIM
routers can always find the nearest RP, thus , providing a shorter and faster way to find RP in a
larger network., Once an RP being used becomes unusable, the unicast routing algorithm will
ensure that the PIM router can find a new RP path fast enough to recover the multicast server
in time. Multiple RP will cause a new problem that is if the multicast source and the receivers
are registered to different RP, some receivers will not be able to receive data of multicast
source (obviously, the register messages only prefer the nearest RP). So, in order to keep the
communication between all RP, Anycast RP defines that the nearest RP to the multicast
source should forward the source register messages to all the other RP to guarantee that all
joiners of the RP can find the multicast source.
The method to realize the PIM-protocol-based Anycast RP is that: maintaining an ANYCAST
RP list on every switch configured with Anycast RP and using another address as the label to
identify each other. When one Anycast RP device receives a register message, it will send the
register message to other Anycast RP devices while using its own address as the source