1) Check traffic on provider CE LAN interface using following command.
CErouter#sh int fa0/0 | in rate
Queueing strategy: fifo
30 second input rate 992000 bits/sec, 307 packets/sec
30 second output rate 2000 bits/sec, 4 packets/sec
2) Check multicast traffic on CE router using following commands
CErouter#sh ip mroute active
Active IP Multicast Sources - sending >= 4 kbps
a negative (-) Rate counts pps being fast-dropped
Group: 233.77.100.4, (?)
Source: 100.10.10.1 (?)
Rate: 2 pps/8 kbps(1sec), 8 kbps(last 0 secs), 0 kbps(life avg)
Group: 233.64.195.81, (?)
Source: 160.1.1.17 (?)
Rate: 20 pps/65 kbps(1sec), 65 kbps(last 0 secs), 1 kbps(life avg)
router#sh ip mroute count
IP Multicast Statistics
91 routes using 43784 bytes of memory
46 groups, 0.97 average sources per group
Forwarding Counts: Pkt Count/Pkts(neg(-) = Drops) per second/Avg Pkt Size/Kilobits per second
Other counts: Total/RPF failed/Other drops(OIF-null, rate-limit etc)
Group: 233.77.100.4, Source count: 1, Packets forwarded: 3231252, Packets received: 3231984
Source: 100.10.10.1/32, Forwarding: 3231252/6/400/19, Other: 3231984/732/0
Group: 233.77.100.58, Source count: 1, Packets forwarded: 1821875, Packets received: 2639381
RP-tree: Forwarding: 0/0/0/0, Other: 0/0/0
Source: 140.1.1.17/32, Forwarding: 1821875/17/400/54, Other: 2639381/0/817506
3) If you don’t see any multicast traffic check whether tunnel (from the remote PE) is up or not on PE router using following command.
PEROUTER#sh ip pim vrf <VRF NAME>neighbor
PIM Neighbor Table
Mode: B - Bidir Capable, DR - Designated Router, N - Default DR Priority,
S - State Refresh Capable
Neighbor Interface Uptime/Expires
Ver DR
Ver DR
Address Prio/Mode
212.60.60.66 Tunnel2 3d21h/00:01:42 v2 1 / DR S P
PEROUTER#sh int Tunnel2
Tunnel2 is up, line protocol is up
Hardware is Tunnel
Interface is unnumbered. Using address of Loopback60 (212.60.60.36)
MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 212.60.60.36 (Loopback60), destination 239.232.63.61, fastswitch TTL 255
Tunnel protocol/transport GRE/IP Multicast, key disabled, sequencing disabled
If tunnel is down,
Check transport vrf configuration on both PE routers (Provider and Member)
a) MDT should be same on both vrfs.
b) Enable pim on all core interfaces.
c) Also check if there are any ACLs which are denying the PIM neighborship to establish.
d) Use following command to trace.
Mtrace < Source add (management address) > < Destination add > < group add>
Tunnel source and destination add will be Loopback 100 for white OSPF, Loopback 60 for RED OSPF and Loopback 70 for BLUE OSPF of PE routers.
5) Use following command to check multicast traffic on PE router.
PEROUTER#sh ip mroute vrf <vrf name> active
Active IP Multicast Sources - sending >= 4 kbps
Group: 233.64.195.84, (?)
Source: 100.10.10.1 (?)
Rate: 28 pps/89 kbps(1sec), 91 kbps(last 40 secs), 90 kbps(life avg)
6) Use following command to display IP multicast routing table.
Router#sh ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
L - Local, P - Pruned, R - RP-bit set, F - Register flag,
T - SPT-bit set, J - Join SPT, M - MSDP created entry,
X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
U - URD, I - Received Source Specific Host Report,
Z - Multicast Tunnel, z - MDT-data group sender,
Y - Joined MDT-data group, y - Sending to MDT-data group
Outgoing interface flags: H - Hardware switched, A - Assert winner
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(100.10.10.1, 233.77.100.4), 1w1d/00:02:51, flags: sTI
Incoming interface: Serial0/0/0:0.101, RPF nbr 62.2.68.29
Outgoing interface list:
FastEthernet0/0, Forward/Sparse, 1w1d/00:02:58
(*, 233.77.100.58), 1d22h/stopped, RP 145.1.1.2, flags: SP
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list: Null
(140.1.1.17, 233.77.100.58), 1d19h/00:03:20, flags: TA
Incoming interface: FastEthernet0/0, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0/0/0:0.101, Forward/Sparse, 01:11:14/00:03:23
Show Commands
1) Show ip pim neighbor
2) Show ip pim Interfaces
3) Show ip pim rp mappings
4) Show ip igmp groups
5) Show ip mroute active
6) Show ip mroute count
Debug commands
1) #debug ip pim
Use the debug ip pim command to display PIM packets received and transmitted, as well as PIM related events.
2) # debug ip igmp
Use the debug ip igmp command to display IGMP packets received and transmitted, as well as IGMP-host related events
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