PIM and DVMRP

[fijog]

Hi,

I am trying out the following Multicast design and doesn't seem to be working...here goes,

HO(router)---WAN---Site(router)----LAN---(L3 Nortel 1200 XLR)

Router-Cisco

L3 Switch--Nortel Accelar

Problem:

I have implemented IP PIM on all our WAN and LAN sites and works fine EXCEPT the site with Nortel XLR.

The Nortel XLR does NOT Support IP PIM.( But does have DVMRP option).

On the site router connecting to Nortel XLR, i have configured DVMRP on LAN to talk to the Nortel XLR.

Specific command - ip dvmrp metric 1 "ACL"

I am testing Multicasting with mcast.exe application from MS resource kit.

Is there anyrthing specific to configure for PIM and DVMRP to interoperate?

Has anyone tried and worked?

How do i check this on the router?

The "Show ip mroute" does not show the multicast traffic.

Any inputs?

Thanks and Regards,

FG

[Harold Ritter]

You could try the following URL:

http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps1835/products_configuration_guide_chapter09186a00800ca79c.html

Let me know if you can't access the document and I will email it to you.

Hope this helps,

[fijog]

Hi,

I cannot access this document, could you please mail it to me on fijo_george@yahoo.com

Thanks,

FG

[Harold Ritter]

I just forwarded you the pdf copy.

[Steve Fuller]

Cisco routers should interoperate with DVMRP devices automatically on all PIM enabled interfaces, but I've seen problems in the past.

Since cisco does not _do_ DVMRP but interoperates with it, it was important to be able to distinquish between a cisco router and a DVMRP router. So there was an understanding between Cisco and Bill Fenner that Cisco would send the IOS version number in the DVMRP hello messages. Bill's implementation then would accept 11.x in the hello.

When Cisco went to IOS 12.x, the DVMRP code was unable to handle this message and would not allow a DVMRP neighbor peering to be established between the Cisco and a DVMRP router.

The hidden command "ip dvmrp use-11.4" allows the Cisco to send out a DVMRP message with an 11.4

version number so that the peering can be established.

[Harold Ritter]

Steve,

I think it would be worth to try this command but as far as I know it was implemented to circumvent an issue with mrouted. I do not know if the Nortel implementation is based on mrouted.

Another thing that could be tried is "sh ip dvmrp route" and "debug ip dvmrp detail" to find out more about what is going on.

Hope this helps,

[fijog]

Hi Steve,

I tried the command "ip dvmrp use-11.4", but still no luck.

The Nortel box is not recieving any group info from router OR the case maybe that the Nortel is recieving groups and is not accepting the same.

Anyways next step is to run debug, but i cannot do it on production network and hence will try it out in my lab.

if any further inputs please post.

Thanks amd Regards,

FG

[Harold Ritter]

If you do a "show ip dvmrp route" on the Cisco box do you see any routes coming from the Nortel box?

You could also try the "mrinfo" command to find-out if the Cisco sees the Nortel.

Hope this helps,