From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Sun Oct 26 2003 - 16:13:46 GMT-3
Hunt,
I'm assuming that you're trying to create two point to point
subnets by using GRE tunneling? What does your unicast routing table
look like? Without seeing your complete config, I'm going to guess that
you're still getting an RPF failure on your hub router. The point of
creating two p2p subnets is to avoid the situation when your incoming
interface and outgoing interface for the multicast feed are the same
interface. You can think of this kind of a like split-horizon for
multicast. Paste your unicast and multicast routing tables.
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 708-362-1418 (Outside the US and Canada)
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Hunt Lee
> Sent: Saturday, October 25, 2003 9:35 PM
> To: ccielab@groupstudy.com
> Subject: multicast issues
>
> Is there a big secret to this?
>
> I have:
> R1 (spoke) R2 (spoke)
> \ /
> R3 (hub - multipoint subinterface)
>
> My R3 is MA.
>
> R1 is Auto-RP for 225.1.1.1
>
> R2 is Auto-RP for 235.1.1.1
>
> Yet R1 can't ping R2's 235.1.1.1, nor vice versa... But R3 can ping
both
> 225.1.1.1 & 235.1.1.1 fine...
>
> R1
>
> interface Tunnel0
> ip unnumbered Loopback0
> ip pim sparse-dense-mode
> tunnel source Loopback0
> tunnel destination 192.1.1.1
>
> interface Serial0
> ip address 10.1.1.1 255.255.255.0
> ip pim sparse-dense-mode
>
> !
> router ospf 1
> passive-interface Tunnel0
>
> ip pim send-rp-announce Loopback0 scope 5 group-list rp-1
> !
> !
> ip access-list standard rp-1
> permit host 225.1.1.1
> !
>
> R2
>
> interface Tunnel0
> ip unnumbered Loopback0
> ip pim sparse-dense-mode
> tunnel source Loopback0
> tunnel destination 192.2.2.2
>
> interface Serial0
> ip address 10.2.2.2 255.255.255.0
> ip pim sparse-dense-mode
>
> router ospf 1
> passive-interface Tunnel0
>
> ip pim send-rp-announce Loopback0 scope 5 group-list rp-2
> !
> !
> ip access-list standard rp-2
> permit host 235.1.1.1
>
> R5
>
> !
> interface Serial0.1 multipoint
> ip address 10.5.5.5 255.255.255.0
> ip pim sparse-dense-mode
>
>
> interface Tunnel0
> ip unnumbered Loopback0
> ip pim sparse-dense-mode
> tunnel source Loopback0
> tunnel destination 10.1.1.1
> !
> interface Tunnel1
> ip unnumbered Loopback0
> ip pim sparse-dense-mode
> tunnel source Loopback0
> tunnel destination 10.2.2.2
>
> ip pim send-rp-discovery Loopback0 scope 5
>
> Thanks,
> H.
>
>
This archive was generated by hypermail 2.1.4 : Mon Nov 24 2003 - 07:53:08 GMT-3