sink RP...

Is it necessary to filter 224.0.1.39 and .40 when configuring a sink RP? I
came across this in a practice lab and didn't do this, but my RP mapping
(using auto-rp) still showed up okay:

R1#sh ip pim rp map
PIM Group-to-RP Mappings

Group(s) 225.0.144.1/32
  RP 2.2.2.2 (?), v2v1, bidir
    Info source: 2.2.2.2 (?), elected via Auto-RP
         Uptime: 23:15:07, expires: 00:02:41
Group(s) 225.0.144.2/32
  RP 2.2.2.2 (?), v2v1, bidir
    Info source: 2.2.2.2 (?), elected via Auto-RP
         Uptime: 23:15:07, expires: 00:02:45
Group(s) 225.0.144.3/32
  RP 2.2.2.2 (?), v2v1, bidir
    Info source: 2.2.2.2 (?), elected via Auto-RP
         Uptime: 23:15:07, expires: 00:02:41
Group(s) 225.0.144.4/32
  RP 2.2.2.2 (?), v2v1, bidir
    Info source: 2.2.2.2 (?), elected via Auto-RP
         Uptime: 23:15:07, expires: 00:02:42
Group(s): 224.0.0.0/4, Static
    RP: 1.1.1.1 (?)

Thanks,

Ron Johns
Sr. Network Engineer
IT Department
CCNP, CCDP, CCSP, CISSP
AT&T WiFi Services

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Received on Sun Sep 06 2009 - 19:26:32 ART