• Advertisement

Multicast routing over subnets

Static, RIP, EIGRP, OSPF, BGP, IBGP, IS-IS and any other routing.

Multicast routing over subnets

Postby Bosna » Fri May 25, 2012 10:07 am

Hey there folks,

My hardware:

Router: Cisco 2811 running ver 12.3 T7
Switches: Cisco 2950 running 12.1 EA1

I've been working on this for days, without much success. I've searched online, and can't really tell what it is that I'm doing wrong. I hate asking for help (especially in writing) but have hit a brick wall.

I'm trying to get a multicast video stream to broadcast between VLANs/subnets (via PIM, although the method really doesn't matter). The end goal is to send a multicast stream via an IPSEC tunnel (between ASAs) to a customer's site. But, to get there, first I need to get multicast between subnets working.

I have multicast routing enabled on the router, and PIM in dense mode enabled on the interfaces. I did this by doing:

conf t
ip multicast-routing
ip bim bidir-enable
int fa0/0
ip pim dense-mode
int fa0/1
ip pim dense-mode
end

When I do sh ip multicast int, I get:

FastEthernet0/0 is up, line protocol is up
Internet address is 10.0.110.3/24
Multicast routing: enabled
Multicast switching: fast
Multicast packets in/out: 760/0
Multicast TTL threshold: 0
Multicast Tagswitching: inactive
FastEthernet0/1 is up, line protocol is up
Internet address is 10.0.0.2/24
Multicast routing: enabled
Multicast switching: fast
Multicast packets in/out: 301/30
Multicast TTL threshold: 0
Multicast Tagswitching: inactive

When I do sh ip pim int fa0/0, I get:
10.0.110.3 FastEthernet0/0 v2/D 1 30 1 10.0.110.3
and sh ip pim int fa0/1
10.0.0.2 FastEthernet0/1 v2/D 2 30 1 10.0.0.5

When I do sh ip mroute, I get:
(*, 229.55.150.208), 17:26:24/stopped, RP 0.0.0.0, flags: D
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
FastEthernet0/1, Forward/Dense, 17:25:21/00:00:00
FastEthernet0/0, Forward/Dense, 17:25:55/00:00:00

(10.0.110.72, 229.55.150.208), 17:26:24/00:02:39, flags: PT
Incoming interface: FastEthernet0/0, RPF nbr 0.0.0.0, Udlr
Outgoing interface list:
FastEthernet0/1, Prune/Dense, 17:24:19/00:02:39, A

(*, 224.0.1.40), 17:26:24/stopped, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
FastEthernet0/1, Forward/Dense, 17:25:21/00:00:00
FastEthernet0/0, Forward/Dense, 17:26:24/00:00:00


My multicast stream is being sent from 10.0.120.104 (on the 120 vlan). I have one box at 10.0.120.106 which gets the stream fine, but a box on 10.0.110.106 (on my 110 vlan) which does not.

When I run wireshark on the non-working box, I get the following IGMP packets:

Code: Select all
source          destination  protocol                     info
10.0.110.106     224.0.0.254   IGMP   V2 membership report / join group 224.0.0.254

10.0.110.106     224.0.0.254   IGMP   V2 membership report / join group 224.0.0.254


On the working box (on the same subnet as the server) I get:

Code: Select all
source          destination  protocol                     info
10.0.120.106     224.0.0.22   IGMP   V3 membership report / join group 224.0.0.254 for any sources

10.0.120.106     224.0.0.22   IGMP   V3 membership report / join group 224.0.0.254 for any sources


Like I said, I'm really not sure what I'm doing wrong, and any help would be greatly appreciated.
Bosna
Hello I'm new here
 
Posts: 1
Joined: Fri May 25, 2012 9:13 am

Advertisement

Re: Multicast routing over subnets

Postby melwong » Thu Jun 14, 2012 10:51 pm

Fundamentals for pure IPSEC states that multicast within the tunnel is not supported.

Unless you are talking about GRE-over-IPSEC which is not pure IPSEC.
melwong
Hello I'm new here
 
Posts: 1
Joined: Thu Jun 14, 2012 10:47 pm



  • Advertisement


Similar topics


Return to Routing Protocols

Who is online

Users browsing this forum: No registered users and 1 guest