From: keith tokash (ktokash@hotmail.com)
Date: Thu Jun 12 2008 - 10:48:30 ART
A real-life reason to avoid auto-RP is that it's proprietary. Even if you
never plan on using anything but Cisco in your life, by deploying a
proprietary technology in a major rollout that's of any importance to your
business and not easily migrated, you are making it more difficult for
management to negotiate better pricing. As for using BSR, I can't remember
who I talked to in Narbik's class about their big multicast deployment
(Roger?) but he basically said they just used static RPs everywhere because
the dynamics just caused problems. I didn't dig further, but I can imagine
that the trouble finding staff capable of troubleshooting a big dynamic
multicast network vs a few static anycast RPs.
Don't get me wrong, I actually like BSR. But the only people I've ever met
who know anything about rendevous points are either CCIEs, CCIE candidates, or
the random consultant who worked on a job with multicast once.
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> Date: Thu, 12 Jun 2008 13:48:41 +0200
> From: marc.a.laporte@gmail.com
> To: ccielab@groupstudy.com
> Subject: Why use BSR?
>
> Hi experts!
>
> What would be a good (real-life) reason to use BSR in combination with RP?
> For example:
>
> ip multicast-routing
> ip pim bsr-candidate Loopback0 4 110
> ip pim rp-candidate Loopback0
> !
> interface Vlan38
> ip pim sparse-mode
>
> Is not BSR used in a situation where you only want to use sparse-mode (and
> not default to dense-mode when no RP can be found)?
> Is not a better solution to use "ip pim autorp listener"?
> What are the pros and cons of using BSR?
> Does it work together with Anycast-RP and MSDP?
>
> Reason is that I am working on developing a IP Multicast standard in a
> multi-homed data center environment (8000+ ports) spanning multiple OSPF
> area, BGP AS's, etc
>
> Thanks for your feedback.
>
> Marc
>
>
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