Invalid RP Join message is seen on Cat 6509

[kr_madan]

Hi All,

I see a invalid RP message on Cat 6509.

Oct 24 16:39:18.120 EDT: %PIM-6-INVALID_RP_JOIN: Received (*, 239.192.

0.11) Join from 10.231.233.85 for invalid RP 10.231.224.1

when i check the rp for the 239.192.0.11 group it shows as other device as rp(10.231.224.5) which is correct.

can any one tell me what could be the problem.

Thanks in advance

Madan

[gaurav.prakash]

Hi,

R u using cmd: 'ip pim accept-rp'; Chk if u r permiting the right RP? Chek using show ip pim rp mapping

HTH,

G

[kr_madan]

Thanks Saurav,

the output of show ip pim rp is showing the proper router as rp and i do not have any ip pim accept-rp command present in config.

do you want me to check the show ip pim rp mapping still ?

[Harold Ritter]

Verify that the RP address on the sender (10.231.233.85)is the same as the one for the router where you see the error message.

Hope this helps,

[kr_madan]

10.231.233.85 is a unix machine. I am not sure how to check it. is there any possibility that unix machine remembers the wrong rp and not updated with the present ?

[kr_madan]

RP mapping is shown as below it is showing proper device as RP

PIM Group-to-RP Mappings

This system is a candidate RP (v2)

Group(s) 239.192.0.0/24

RP 10.231.224.5 (?), v2

Info source: 10.231.224.5 (?), via bootstrap

Uptime: 9w6d, expires: 00:02:30

RP 10.231.224.1 (?), v2

Info source: 10.231.224.5 (?), via bootstrap

Uptime: 9w6d, expires: 00:02:39

[Harold Ritter]

As the message states, the neighbor send a PIM join toward 10.231.224.1 while on the local router the RP is seen as 10.231.224.5, hence the error message.

Hope this helps,

[kr_madan]

Hi,

Thanks for the info.

As the rp is 10.231.224.5 why the other device is joingin a invaid rp 10.231.224.1 ?

Thanks

Madan.

[Harold Ritter]

Actually, in the output you provided, there are two candidate RPs:

Group(s) 239.192.0.0/24

RP 10.231.224.5 (?), v2

Info source: 10.231.224.5 (?), via bootstrap

Uptime: 9w6d, expires: 00:02:30

RP 10.231.224.1 (?), v2

Info source: 10.231.224.5 (?), via bootstrap

Uptime: 9w6d, expires: 00:02:39

10.231.224.1 and 5 are both candidates. On an IOS platform, assuming the priority is equal, the highest ip address is selected but on this platform, it seems to be the opposite as 10.231.224.1 was used to forward the PIM join. What platform is this?

Hope this helps,

[k-baba]

I guess the RP 172.27.30.6 is source or receiving multicast, but it also requires static RP configuration on itself. please add below on RP router.

access-list 10 permit 239.192.0.0 0.0.255.255

ip pim rp-address 172.27.30.6 10