From: Gary Duncanson (gary.duncanson@googlemail.com)
Date: Sat Oct 13 2007 - 08:09:56 ART
No problem. That command does seem to be the gatekeeper to situations
involving Frame and Multicast.
----- Original Message -----
From: "George Roman" <georgeroman@gmail.com>
To: <ccielab@groupstudy.com>
Sent: Saturday, October 13, 2007 11:43 AM
Subject: Re: Multicast over FR (hub and spoke)
> Hi again,
>
> The problem is solved, it seem that it took some time for the command "ip
> pim nbma-mode" to take effect over the mroute table:) now everything is
> fine.
>
> Thanks!
>
> On 10/13/07, George Roman <georgeroman@gmail.com> wrote:
>>
>> Hi group I have this question regarding multicast over frame-relay hub
>> and
>> spoke network (i am pretty week at multicast but i am trying to improve
>> so
>> please be patient):
>>
>> Assume that i have 3 routers: R1, R2, R3 with R2 being the the hub of
>> the
>> frame relay network and also the RP for my the Multicast group (i am
>> using
>> PIM sparse-mode, and over the FR cloud broadcasts/multicasts are allowed,
>> R1
>> &R3 connect with R2 via point-to-point subinterfaces, R2 connects to
>> R1&R3
>> using the major interface and static FR mapping ). Now i make R3 fast
>> ethernet to join my group ( using igmp join group....) and by using the
>> source ip address of the fast ethernet interface of router R1 i am trying
>> to
>> reach (ping) this group i have just joined on R3.
>> The problem is that this group seem to be reachable for 3 or 4 icmps and
>> after that it is unreachable.
>> I have tried to look in the mroute table of my routers to find out what
>> happens there and here is what i observed:
>> On R3 RPF check is made on the correct interface (the serial interface),
>> but on the ip address of R2; on the routing table on the other hand the
>> path
>> to the router's R1 fast ethernet ip address is via R1 directly, which i
>> find
>> normal.
>>
>> Now the question. Is RPF check made only on the interface or does the IP
>> address of the reverse path have to match also?
>>
>> Here is what i have done when trying to resolve my problem:
>> -I have tried to enable ip pim nbma-mode on router 2 but no success
>> there.
>>
>> -I have put a static mroute that should enabe RPF check via the ip
>> address
>> of R2 but also without success.
>>
>>
>> What can be the issue and how can i solve this problem?
>>
>> Thanks for your time,
>> George
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Fri Nov 16 2007 - 13:11:14 ART