The absolute simplest IGMPv3 network?

Unanswered Question
Apr 17th, 2008

I am going nuts, I am supposed to test my IGMPv3 software, I have a 3750, 3825 and 2821 plonked on my desk to do this.

The 3750 does IGMPv2 ok, but does not seem to do full IGMPv3, leaves are very slow.

I have played around for a couple of weeks now with all those nice simple examples that say 'ip pim sparse-dense-mode' etc... it never works.

So what is the very simplest network I could make, could I just do it on the the little 100MB switches built into either router?

I am hoping here for a script that I can just blindly type in, no matter what addresses etc, I will change the rest of the world to match :)

Hopefully

Chris

I have this problem too.
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ivillegas Wed, 04/23/2008 - 07:51

It is advisable to enable "portfast" on the switch ports connected directly to the HSRP router interfaces. Also it is advisable to hard code the switch ports to permanently match the routers speed and duplex settings.

The main benefits of this feature are that it provides minimal leave latencies, faster channel changing, and improved diagnostics capabilities for IGMP.

http://www.cisco.com/en/US/docs/ios/12_1t/12_1t5/feature/guide/dtssm5t.html#wp1027311

http://www.cisco.com/en/US/docs/ios/ipmulti/configuration/guide/imc_customize_igmp_ps6922_TSD_Products_Configuration_Guide_Chapter.html#wp1055395

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