Reference Guide
566 | Multicast Source Discovery Protocol (MSDP)
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Figure 26-6. Configuring MSDP
AS 100
AS 200
+
B
G
P
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B
G
P
RP1
RP2
R1
R2
R3
R4
1/1
1/21
2/11
2/31
3/21
3/41
4/31
4/1
1/2
PC 1
Receiver: 239.0.0.1
PC 2
Source: 239.0.0..1
PC 3
Receiver: 239.0.0.1
2/1
O
S
P
F
Area 0
O
S
P
F
Area 0
+
P
I
M
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I
G
M
P
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P
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M
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G
M
P
R1_E600(conf)#do show run msdp
!
ip multicast-msdp
ip msdp peer 192.168.0.3 connect-source Loopback 0
R1_E600(conf)#do show ip pim tib
PIM Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned,
R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT,
M - MSDP created entry, A - Candidate for MSDP Advertisement
K - Ack-Pending State
Timers: Uptime/Expires
Interface state: Interface, next-Hop, State/Mode
(*, 239.0.0.1), uptime 22:26:37, expires 00:00:00, RP 192.168.0.1, flags: SCJ
Incoming interface: Null, RPF neighbor 0.0.0.0
Outgoing interface list:
GigabitEthernet 1/1 Forward/Sparse 22:26:37/Never
(10.11.4.2, 239.0.0.1), uptime 1d16h, expires 00:03:12, flags: CTA
Incoming interface: GigabitEthernet 1/21, RPF neighbor 10.11.1.21
Outgoing interface list:
GigabitEthernet 1/1 Forward/Sparse 22:26:37/Never
R1_E600(conf)#do show ip msdp sa-cache
MSDP Source-Active Cache - 1 entries
GroupAddr SourceAddr RPAddr LearnedFrom Expire UpTime
239.0.0.1 10.11.4.2 192.168.0.1 local 95 16:49:25
R3_E600(conf)#do show run msdp
!
ip multicast-msdp
ip msdp peer 192.168.0.1 connect-source Loopback 0
R3_E600(conf)#do show ip pim tib
PIM Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned,
R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT,
M - MSDP created entry, A - Candidate for MSDP Advertisement
K - Ack-Pending State
Timers: Uptime/Expires
Interface state: Interface, next-Hop, State/Mode
(*, 239.0.0.1), uptime 21:07:53, expires 00:02:30, RP 192.168.0.3, flags: S
Incoming interface: Null, RPF neighbor 0.0.0.0
Outgoing interface list:
GigabitEthernet 3/41 Forward/Sparse 21:07:53/00:02:30
(10.11.4.2, 239.0.0.1), uptime 16:56:34, expires 00:02:02, flags: TM
Incoming interface: GigabitEthernet 3/21, RPF neighbor 10.11.0.23
Outgoing interface list:
GigabitEthernet 3/41 Forward/Sparse 16:48:48/00:02:30
R3_E600(conf)#do show ip msdp sa-cache
MSDP Source-Active Cache - 1 entries
GroupAddr SourceAddr RPAddr LearnedFrom Expire UpTime
239.0.0.1 10.11.4.2 192.168.0.1 192.168.0.1 77 16:49:37
M
S
D
P
P
e
e
r
s
h
i
p
R2_E300(conf)#do show ip pim tib
PIM Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned,
R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT,
M - MSDP created entry, A - Candidate for MSDP Advertisement
K - Ack-Pending State
Timers: Uptime/Expires
Interface state: Interface, next-Hop, State/Mode
(10.11.4.2, 239.0.0.1), uptime 22:27:00, expires 00:02:09, flags: FT
Incoming interface: GigabitEthernet 2/1, RPF neighbor 0.0.0.0
Outgoing interface list:
GigabitEthernet 2/11 Forward/Sparse 22:26:43/00:02:40
GigabitEthernet 2/31 Forward/Sparse 16:49:00/00:03:22
R4_C300(conf)#do show ip pim tib
PIM Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned,
R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT,
M - MSDP created entry, A - Candidate for MSDP Advertisement
K - Ack-Pending State
Timers: Uptime/Expires
Interface state: Interface, next-Hop, State/Mode
(*, 239.0.0.1), uptime 21:07:44, expires 00:00:00, RP 192.168.0.3, flags: SCJ
Incoming interface: GigabitEthernet 4/31, RPF neighbor 10.11.6.34
Outgoing interface list:
GigabitEthernet 4/1 Forward/Sparse 21:07:44/Never
(10.11.4.2, 239.0.0.1), uptime 16:48:40, expires 00:03:16, flags: CT
Incoming interface: GigabitEthernet 4/31, RPF neighbor 10.11.6.34
Outgoing interface list:
GigabitEthernet 4/1 Forward/Sparse 21:07:44/Never