Re: Multicast with HSRP.

Without seeing your topology I can't say where you would need a static
mroute, you may not need one at all. Make sure you are running pim on
both the physical interfaces and all interfaces on their routes back
to the source(confirm with traceroute). make sure the current HSRP
active router has a higher pim dr priority than the standby. If your
primary dies, the secondary should pick up gateway and pim forwarding
duties at the same time.

 Remember mroute doesn't specify the route for traffic. It is a way to
disable a loop prevention check in multicast. It makes it permissible
to receive multicast on an interface different than the one it would
normally route traffic to.

 If you can post some topology I can try to help further, otherwise if
you have the abilty to test you might try the above without a static
mroute.

On Tue, Jul 26, 2011 at 6:10 PM, JB Poplawski <jb.poplawski_at_gmail.com> wrote:
> So do I still set my default m-route 0.0.0.0 to the hsrp address or to
> one of the physical IPs?
>
> What happens with a failover? IE I set it to one physical IP, that
> box dies, etc.
>
> Sorry for the basic questions, Multicast isn't my strong suit.
>
> On Tue, Jul 26, 2011 at 6:05 PM, marc abel <marcabel_at_gmail.com> wrote:
>> Just to be clear I mean your PIM DR.
>>
>> ip pim dr-priority 100
>>
>> On Tue, Jul 26, 2011 at 6:04 PM, marc abel <marcabel_at_gmail.com> wrote:
>>> Try setting your DR priority. I ran into a similar issue where my
>>> secondary HSRP was being elected the DR for the segment since it had a
>>> higher IP address. Once I set the DR to the primary hsrp switch all
>>> was well. This should still fail over fine as well.
>>>
>>> -Marc
>>>
>>> On Tue, Jul 26, 2011 at 5:18 PM, JB Poplawski <jb.poplawski_at_gmail.com> wrote:
>>>> Good afternoon,
>>>>
>>>> I'm currently running into a random multicast issue. We have a
>>>> connection to a vendor sending us multicast feeds. I have static
>>>> routes to the source ips to their HSRP address for RPF purposes. My
>>>> host subscribes and I can see (with show ip mroute) the groups show
>>>> up, but no data. Figuring it was an HSRP issue, I added a static
>>>> M-Route to one of the physical host IPs and BAM!!! starting receiving
>>>> traffic.
>>>>
>>>> http://www.cisco.com/en/US/tech/tk828/technologies_tech_note09186a0080094aab.shtml
>>>>
>>>> Where's my goof? I add the static m-route to the HSRP address it
>>>> stops, re-add to a physical and it works again. My concern is if I
>>>> add a default static m-route to a physical device and that host dies,
>>>> I have to hurry quick and change the default m-route.
>>>>
>>>> Topology is basically the same as attached cisco document.
>>>>
>>>> Any thoughts or creating solutions?
>>>> JB
>>>>
>>>>
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Received on Tue Jul 26 2011 - 21:42:40 ART