[Xorp-users] role of pimreg interface

[Hajnalka Köntös]

Thank you very much, Pavlin.
Hajnalka

On 2/7/06, Pavlin Radoslavov <pavlin@icir.org> wrote:
> > If routerA----routerB are connected and both of them are using pimsm,
> > then which will be selected as pimsm DR? Is there one pimsm DR per
> > network segment? Is there an option to influence which router be the
> > DR on a segment?
>
> Yes, there is only one DR per network segment. Section 4.3.2 in the
> PIM-SM spec (draft-ietf-pim-sm-v2-new-11.txt) describes the election
> algorithm in details.
> In summary, the router with the largest DR Priority is the DR; if
> there is a tie, then the router with the larger primary IP address
> is the DR.
> Note that if there are legacy PIM routers that don't support the DR
> Priority Hello option, then only the IP addresses are used in the
> election.
>
> In XORP you can configure the DR Priority with the
> pimsm4/interface/vif/dr-priority configuration option.
> See the sample rtrmgr/config.boot.sample and the XORP user manual
> for details.
>
> Pavlin
>