All things related to multicast

[Jay Ford <>]

On Wed, 4 Sep 2002, Tim Ward wrote:
> Quoting Peter John Hill 
> ():
> > Totally been there and done that. We just got everything stable a few
> > weeks ago. Give me a call if you want to discuss it
> ...
> > We are using auto-rp with anycast and sparse mode. It is #10 as
> > described in:
> > http://www.cisco.com/warp/public/cc/pd/iosw/tech/rppim_rg.htm
>
> When we were rolling out multicast to all of our dorms for our dorm
> TV system, we were seeing odd 60 second dropouts.  We had at the time
> Auto-RP and PIM Sparse.  The scoop from the TAC on the problem is that
> Auto-RP relied on PIM Dense for the auto-RP to work, and that you had
> to configure for PIM Sparse Dense mode if you were using auto-rp.
> (the heavily distilled version).
>
> Does this jive with everyone else's experience?
>
> We were halfway to PIM-Sparse BSR and migrating to anycast rp so I
> didn't think much of it at the time.  But looking at the comments above
> made me wonder.

I opted to avoid BSR & auto-rp entirely, in favor of statically defining the
anycast RP address on the non-RPs.  I use an IP address which is used only
for the anycast RP, which decouples it from any particular box & thus
minimizes the risk of having to change the static RP definition in the
non-RPs due to failure or relocation of the RP(s).  It's simple & it seems to
work.

________________________________________________________________________
Jay Ford, Network Engineering Group, Information Technology Services
University of Iowa, Iowa City, IA 52242
email: 
,
 phone: 319-335-5555, fax: 319-335-2951