02-29-2008 11:07 AM - edited 03-05-2019 09:28 PM
I am trying to set up multicasting using sparse-mode with Auto-RP. We basically have a 355012G or equivalent at each of our sites. Our WAN connection comes in on gi0/1 and then we use VLAN Interfaces to seperate subnets after that. I set up sparse-mode on both Gi0/1 and VLAN5 (the vlan interface I want to run multicast on). I set up a feed and am trying to ping that feed (after joining the group) and I can pink it fine using gi0/1 as a source, but not VLAN 5. It fails the RPF check. I have put a static mroute entry in "ip mroute [ip of VLAN 5 subnet] [ip of next hop interface i want to reach]. I am not sure of what to put for the "destination interface" of the ip mroute statement. We have a mesh through our cloud to all of our sites. Would I have to enter a ip mroute statement for all of the sites? Any help would be appreciated. I have attached some shows to show what is going on.
02-29-2008 11:54 AM
Hi,
The (IP mroute) command has different concept than a normal (IP route)command.
IP mroute, is used to reach a source rather than destination.
The RPF method indicate that if the incoming interface is not the outgoing interface for the multicast packet then the Multicast packet is dropped.
I can see that you need to influence the return multicast packet twoard the source through GigabitEthernet0/1.
Note: you will need to make sure of all RPF checks is not failed in all sites.
Ie:IP mroute (source of the group) G0/1
Hope it helps,
Mohamed
02-29-2008 12:09 PM
I tried using the "G0/1" on the mroute statemet before submitting this post but it said I couldn't do that...
Next hop IP address required for multi-access media.
02-29-2008 12:27 PM
Hi,
There is two approach to influence a Multicast packet tward a source.
1- Creating end-to-end tunnel interface, and influencing a static route tward the RP which (is the source in this case).
2- you can modify the routing table desition locally, check if the RP prefix is could be influenced to be reachable via the same interface a multicast packet comes from. (This could be acheived by modifying normal routing path).
HTH
Mohamed
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