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03-01-2013 08:05 AM
03-01-2013 08:05 AM
L3 Multicast not working
Hello,
I have been trying to implement multicast routing on a network with a 10504 switch without much success.
My topology is really simple: I have two vlans, vlan 36 and vlan 9 configured on two ports in access mode. For each of this vlan, the 10504 switch is the default gateway. The port configured with vlan 9 has the multicast receiver attached and port configured with vlan 36 has the multicast sender attached.
I have configured the 10504 to use IGMP and PIM DM.
When I display the pim routing table, multicast routing table and multicast forwarding table everything seems ok. When I ping from the multicast sender to the multicast group (239.255.100.100), I am able to see the icmp packet arriving at the receiver. However, when I use a a udp application to stream some contents, the udp packets never reach the multicast receivers.
When using a sniffer to see where the multicast traffic stops I see that it enters the vlan 36 (connected to the sender) interface but never goes out the vlan9 interface (connected to the receiver).
Configuration in attach
Below is the topoogy with more detail:
Multicast Source: 10.84.36.203/23 multicasting to 239.255.100.100
|
|
vlan36
|
|
gi1/2/0/23
if vl36:10.84.37.254/23
___________________________________________
|Switch 10504 (L3 switch w/ igmp,pim dm) |
|__________________________________________|
if vl9:10.84.9.254/24
gi1/2/0/22
|
|
vlan9
|
|
Multicast Receiver: 10.84.9.147 listening to 239.255.100.100
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03-04-2013 12:51 PM
03-04-2013 12:51 PM
Re: L3 Multicast not working
Could you check these outputs:
display igmp group
display pim routing-table
display multicast routing-table
Thanks.
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03-07-2013 12:29 PM
03-07-2013 12:29 PM
Re: L3 Multicast not working
If I understand well your diagram the source and receiver(s) are directly connected in the same switch.
Do the following, and take note:
display pim interface
display pim neighbor
display pim routing-table
The outputs will give clue of what is going on.
Apart from multicast routing on the vpn-instance " public net" (global routing), you need:
on the receiver(s) vlan interface : igmp enable and pim dm
On the source vlan interface : pim dm ONLY