Msdp Configuration Example - 3Com 7757 Configuration Manual

494 C 48: MSDP C
HAPTER
MSDP Configuration
Example
Configuration Example
of MSDP Based on BGP
Routes
ONFIGURATION
Table 393 Display and debug MSDP configuration
Operation
Display the (S, G) state learned from MSDP peers display msdp sa-cache [ group-address |
Display the number of sources and groups in the
MSDP cache
Reset the TCP connection with the specified
MSDP peer
Clear the cached SA messages
Clear the statistics information of the specified
MSDP peer without resetting the MSDP peer
Tracing the transmission path of an SA message over the network
You can use the msdp-tracert command in any view to trace the path along
which the multicast data travels from the multicast source to the destination
receiver over the network, so as to locate errors, if any.
Table 394 Trace the transmission path of an SA message over the network
Operation
Trace the transmission path of an SA message over
the network
You can locate message loss and configuration errors by tracing the network path
of the specified (S, G, RP) entries. Once the transmission path of SA messages is
determined, correct configuration can prevent the flooding of SA messages.
Network requirements
Two ISPs maintains their ASs, AS 100 and AS 200 respectively. OSPF is running
within each AS, and BGP is running between the two ASs. PIM-SM1 belongs to AS
100, while PIM-SM2 and PIM-SM3 belong to AS 200.
Suppose each PIM-SM domain is a single-BSR-managed domain, having 0 or 1
multicast source S and multiple receivers. OSPF runs within each domain to
provide unicast routes. An MSDP peering relationship is established between the
RPs based on BGP routes within each PIM-SM network.
Loopback 0 on Switch C, Switch D and Switch E functions as the C-BSR and C-RP
of its own PIM-SM domain respectively. An MSDP peering relationship is
established between Switch C and Switch F based on EBGP routes, and an MSDP
peering relationship is established between Switch F and Switch D based on IBGP
routes.
Command
[ source-address ] ]
[autonomous-system-number ]
display msdp sa-count
[autonomous-system-number ]
reset msdp peer peer-address
reset msdp sa-cache [ group-address ]
reset msdp statistics [ peer-address ]
Command
msdp-tracert source-address
group-address rp-address [ max-hops
max-hops ] [ next-hop-info | sa-info |
peer-info ]* [ skip-hops skip-hops ]