From: Tran Tien Phong (PhongTT2@FPT.COM.VN)
Date: Mon Dec 09 2002 - 07:35:37 GMT-3
Nate,
I don't think that the reason is R4 don't know the route 10.1.1.1
Pls note that PIM works between multicast routers. Your topology showed
that you have 3 routers but only R3 needed to be multicast router, R1 is
the Receiver and R4 is the Sender. In your scenario, you don't even need
any pim command, just enable multicast routing at R3 and enable igmp for
S0/1 and S0/2 of R3. Your must enable pim if there are at least 2
multicast router between the sender and the receiver. In your topology
there is only one multicast router. That's is R3.
The RP address is not the problem here. You can ping the multicast
address even in case you could not ping the 10.1.1.1 (the address of the
lo0). But, before expecting to see the reply from ping, you must be sure
that you can ping the IP ADDRESS of the host (the receiver). In your
topology, you must be sure that from R4, you can ping the R1 S0/2.
As I can see int your configs of R1, R1 did not run any routing protocol
and did not have any static route. This means that R4 can see the route
to 1.1.1.1 (S0/2 of R1) via redistribution of RIP to OSPF but R1 can not
see the route to 3.1.1.4 (the S0/1 of R4).
Remember before pinging the multicast address, check to see that you can
ping the IP address of all host in the multicast group.
Make changes to your configs so that from R4, you can ping the IP
address 1.1.1.1 successfully. After that, I'm sure that you can ping the
multicast address.
Hope this helps,
-----Original Message-----
From: jl yan [mailto:yanjunling@hotmail.com]
Sent: Monday, December 09, 2002 3:03 PM
To: nchessin@cisco.com; ccielab@groupstudy.com
Subject: Re: Multicast Question
R4 don't know the route 10.1.1.1, must add this route to IGP
>From: "Nathan Chessin" <nchessin@cisco.com>
>Reply-To: "Nathan Chessin" <nchessin@cisco.com>
>To: <ccielab@groupstudy.com>
>Subject: Multicast Question
>Date: Sun, 8 Dec 2002 19:30:17 -0800
>
>Hi All,
>
>I have a simple multicast topology set up and I am having trouble.
>
>I can't ping the multicast group from router 4.
>
>R1(s0/2)-------------(s0/2)R3(s0/1)--------------(s0/1)r4
>
>All the interfaces have a "ip pim spare-mode" and all routers have ip
>multicast-routing enabled.
>
>On all routers I have "ip pim rp-address 10.1.1.1" which is the
loopback
>address of R1 and is reachable by all routers. The loopback also has
ip
>pim
>sparse-mode, and on R1 I have "ip igmp join 225.2.2.40" under s0/2.
>
>I can't ping 225.2.2.40 from r4, but I can from R3. Any ideas?
>
>Configs below.
>
>Thanks,
>Nate
>
>hostname R1
>!
>ip subnet-zero
>no ip domain-lookup
>!
>ip multicast-routing
>lane client flush
>cns event-service server
>!
>!
>interface Loopback0
> ip address 10.1.1.1 255.255.255.0
> ip pim sparse-mode
>!
>interface Loopback10
> ip address 11.1.1.1 255.255.255.0
>!
>interface Loopback20
> ip address 12.1.1.1 255.255.255.0
>!
>interface Loopback30
> ip address 13.1.1.1 255.255.255.0
>!
>interface Loopback40
> ip address 14.1.1.1 255.255.255.0
>!
>interface Ethernet0/1
> ip address 44.1.1.1 255.255.255.0
>!
>interface Serial0/1
> no ip address
> shutdown
>!
>interface Serial0/2
> ip address 1.1.1.1 255.255.255.0
> ip pim sparse-mode
> ip igmp join-group 225.2.2.40
>!
>ip classless
>no ip http server
>ip pim rp-address 10.1.1.1
>---------------------
>hostname R3
>!
>!
>ip subnet-zero
>no ip domain-lookup
>!
>ip multicast-routing
>lane client flush
>cns event-service server
>!
>!
>interface Ethernet0/1
> ip address 44.1.1.3 255.255.255.0
>!
>interface Serial0/1
> ip address 3.1.1.3 255.255.255.0
> ip pim sparse-mode
> clockrate 64000
>!
>interface Serial0/2
> ip address 1.1.1.3 255.255.255.0
> ip pim sparse-mode
> clockrate 64000
>!
>!
>router ospf 100
> redistribute rip subnets
> network 3.1.1.0 0.0.0.255 area 0
> network 44.1.1.0 0.0.0.255 area 0
>!
>router rip
> redistribute ospf 100
> network 1.0.0.0
> default-metric 5
>!
>ip classless
>no ip http server
>ip pim rp-address 10.1.1.1
>!
>-------------------------------------
>
>hostname R4
>!
>!
>ip subnet-zero
>no ip finger
>no ip domain-lookup
>!
>ip multicast-routing
>ip audit notify log
>ip audit po max-events 100
>!
>!
>interface Loopback0
> ip address 100.1.1.1 255.255.255.0
>!
>interface Loopback10
> ip address 110.1.1.1 255.255.255.0
>!
>interface Loopback20
> ip address 120.1.1.1 255.255.255.0
>!
>interface Loopback30
> ip address 130.1.1.1 255.255.255.0
>!
>interface Loopback40
> ip address 140.1.1.1 255.255.255.0
>!
>interface Ethernet0/0
> no ip address
> shutdown
>!
>!
>interface Serial0/1
> ip address 3.1.1.4 255.255.255.0
> ip pim sparse-mode
>!
>!
>interface FastEthernet2/0
> ip address 44.1.1.4 255.255.255.0
> duplex auto
> speed auto
>!
>!
>router ospf 100
> log-adjacency-changes
> network 3.1.1.0 0.0.0.255 area 0
> network 44.1.1.0 0.0.0.255 area 0
> network 100.1.1.0 0.0.0.255 area 0
> network 110.1.1.0 0.0.0.255 area 0
> network 120.1.1.0 0.0.0.255 area 0
> network 130.1.1.0 0.0.0.255 area 0
>!
>ip classless
>ip http server
>ip pim rp-address 10.1.1.1
>!
>.
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