Issue with PIM RP

[KhushalSh]

Setup -

I have a server, connected to a data provider via a dedicated P2P link.
The link terminates on one of the interface on the server (eno2)

The provider emits data via BGP-Multicast messages.
It has provided the LAN-IP Pool, WAN-IP Pool, CE-IP (consumer-ip), PE-IP (provider-ip), AS numbers, RP IP, Multicast-IP and a source IP.

I am running FRR on the server, and this is my /etc/frr/frr.conf

frr version 8.5.3
frr defaults traditional
hostname server.sample.in
log syslog informational
no ipv6 forwarding

ip route <RP_IP>/32 <PE_IP>/32 eno2

service integrated-vtysh-config

!
ip prefix-list LAN_PREFIXES seq 5 permit 0.0.0.0/0 le 32
!
route-map BGP_IN permit 10
 match ip address prefix-list LAN_PREFIXES
 set local-preference 100
exit
!
route-map BGP_OUT permit 10
 match ip address prefix-list LAN_PREFIXES
 set local-preference 100
exit


!
debug pim events
!
interface eno2
 ip igmp
 ip igmp join MULTICAST_IP
 ip pim
exit
!
router bgp <MY_AS_NUMBER>
 bgp router-id <CE_IP>
 no bgp suppress-duplicates
 no bgp hard-administrative-reset
 no bgp graceful-restart notification
 neighbor <PE_IP> remote-as <PROVIDER_AS_NUMBER>
 neighbor <PE_IP> password <PASSWORD>
 !
 address-family ipv4 unicast
  network <LAN>
  neighbor <PE_IP> route-map BGP_IN in
  neighbor <PE_IP> route-map BGP_OUT out
 exit-address-family
exit

ip pim rp <RP-IP> <Multicast-IP>/32
!

My Network interfaces on the server are -

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 98:f2:b3:27:01:10 brd ff:ff:ff:ff:ff:ff
    altname enp2s0f0
    inet <my_server_ip> brd <server_ip> scope global noprefixroute eno1
       valid_lft forever preferred_lft forever
    inet6 fe80::9af2:b3ff:fe27:110/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: eno2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 98:f2:b3:27:01:11 brd ff:ff:ff:ff:ff:ff
    altname enp2s0f1
    inet <CE_IP>/30 scope global eno2
       valid_lft forever preferred_lft forever
4: eno3: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 98:f2:b3:27:01:12 brd ff:ff:ff:ff:ff:ff
    altname enp2s0f2
5: eno4: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 98:f2:b3:27:01:13 brd ff:ff:ff:ff:ff:ff
    altname enp2s0f3
89: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether da:be:be:51:ef:c6 brd ff:ff:ff:ff:ff:ff
    inet <LAN_IP>/28 scope global dummy0
       valid_lft forever preferred_lft forever
    inet6 fe80::d8be:beff:fe51:efc6/64 scope link 
       valid_lft forever preferred_lft forever
114: pimreg@NONE: <NOARP,UP,LOWER_UP> mtu 1472 qdisc noqueue state UNKNOWN group default qlen 1000
    link/pimreg 

When I do -
[root@server frr]# vtysh -c "show ip bgp summary"

IPv4 Unicast Summary (VRF default):
BGP router identifier <CE_IP>, local AS number <AS_NUMBER> vrf-id 0
BGP table version 11
RIB entries 20, using 3840 bytes of memory
Peers 1, using 725 KiB of memory

Neighbor        V         AS   MsgRcvd   MsgSent   TblVer  InQ OutQ  Up/Down State/PfxRcd   PfxSnt Desc
<PE_IP>   4      <AS>        43        39        0    0    0 00:04:54           10       11 N/A

Total number of neighbors 1

[root@server frr]# vtysh -c "show ip pim interface"
 Interface  State  Address        PIM Nbrs  PIM DR  FHR  IfChannels  
 eno2       up     CE_IP  0         local   0    0           
 pimreg     up     0.0.0.0        0         local   0    0   

But, I am unable to see anything for IGMP groups/neighbours -

[root@server frr]# vtysh -c "show ip igmp groups"
Total IGMP groups: 0
Watermark warn limit(Not Set): 0
Interface        Group           Mode Timer    Srcs V Uptime 

[root@server frr]# vtysh -c 'show ip pim neighbor'
 Interface  Neighbor  Uptime  Holdtime  DR Pri  

[root@server frr]# vtysh -c 'show ip pim rp-info'
 RP address    group/prefix-list  OIF      I am RP  Source  Group-Type  
<RP-IP>  <Multicast-IP>/32    Unknown  no       Static  ASM         

I see these logs - 

frrinit.sh[218233]: Starting watchfrr with command: '  /usr/libexec/frr/watchfrr  -d  -F traditional   zebra bgpd pimd staticd'
watchfrr[218240]: [T83RR-8SM5G] watchfrr 8.5.3 starting: vty@0
watchfrr[218240]: [ZCJ3S-SPH5S] zebra state -> down : initial connection attempt failed
watchfrr[218240]: [ZCJ3S-SPH5S] bgpd state -> down : initial connection attempt failed
watchfrr[218240]: [ZCJ3S-SPH5S] pimd state -> down : initial connection attempt failed
watchfrr[218240]: [ZCJ3S-SPH5S] staticd state -> down : initial connection attempt failed
watchfrr[218240]: [YFT0P-5Q5YX] Forked background command [pid 218241]: /usr/libexec/frr/watchfrr.sh restart all
frrinit.sh[218245]: /usr/libexec/frr/frrcommon.sh: line 216: kill: `': not a pid or valid job spec
frrinit.sh[218246]: /usr/libexec/frr/frrcommon.sh: line 216: kill: `': not a pid or valid job spec
frrinit.sh[218247]: /usr/libexec/frr/frrcommon.sh: line 216: kill: `': not a pid or valid job spec
frrinit.sh[218248]: /usr/libexec/frr/frrcommon.sh: line 216: kill: `': not a pid or valid job spec
frrinit.sh[218253]: 2025/08/15 02:38:33 ZEBRA: [NNACN-54BDA][EC 4043309110] Disabling MPLS support (no kernel support)
pimd[218266]: [SPXBS-HQCC1] PIM INTERFACE UP: on interface eno2 ifindex=3
zebra[218254]: [VTVCM-Y2NW3] Configuration Read in Took: 00:00:00
bgpd[218259]: [VTVCM-Y2NW3] Configuration Read in Took: 00:00:00

pimd[218266]: [VAKV3-NMY7B][EC 100663337] error processing configuration change: error [internal inconsistency] event [apply] operation [create] xpath [/frr-routing:routing/control-plane-protocols/control-plane-protocol[type='frr-pim:pimd'][name='pim'][vrf='default']/frr-pim:pim/address-family[address-family='frr-routing:ipv4']/frr-pim-rp:rp/static-rp/rp-list[rp-address='<RP_IP>']/group-list[.='<MULTICAST-IP>/32']] message: No Path to RP address specified: RP-IP

pimd[218266]: [VTVCM-Y2NW3] Configuration Read in Took: 00:00:00
frrinit.sh[218276]: No Path to RP address specified: 172.19.1.210
watchfrr[218240]: [VTVCM-Y2NW3] Configuration Read in Took: 00:00:00
staticd[218274]: [VTVCM-Y2NW3] Configuration Read in Took: 00:00:00
watchfrr[218240]: [QDG3Y-BY5TN] zebra state -> up : connect succeeded
watchfrr[218240]: [QDG3Y-BY5TN] bgpd state -> up : connect succeeded
watchfrr[218240]: [QDG3Y-BY5TN] pimd state -> up : connect succeeded
watchfrr[218240]: [QDG3Y-BY5TN] staticd state -> up : connect succeeded
watchfrr[218240]: [KWE5Q-QNGFC] all daemons up, doing startup-complete notify
frrinit.sh[218233]: Started watchfrr
systemd[1]: Started FRRouting.
bgpd[218259]: [M59KS-A3ZXZ] bgp_update_receive: rcvd End-of-RIB for IPv4 Unicast from <PE_IP> in vrf default


There is an error of RP-IP not found.

Why am I getting this error ?

Any suggestions for fixes ?
Can someone point what am I missing ?

[KhushalSh]

@ton31337 @donaldsharp

[Jafaral]

During startup and shortly after , you may not have routes to the RP. PIM just logs that. If after a short while you can ping the RP IP address, you can ignore the error. I don't think you have any issues here.

[Jafaral]

Also, I recommend upgrading to the latest FRR version, 10.4.1 if you can.

[KhushalSh]

In that case, why am I not able to see the groups ?
Why am I not able to join?

Any issue that you see with the config?

[Jafaral]

It is hard to tell what the issue are without knowing what you are trying to do. I don't know how are you testing/generating multicast traffic. You will not see any group info if you don't have multicast traffic.

[KhushalSh]

The multicast traffic is generated by a data provider. I do not have any control over it.

[KhushalSh]

I updated, and also fixed a firewall issue.

Now, I am able to see the neighbor on pim -

[root@server frr]# vtysh -c 'show ip pim neighbor'
 Interface  Neighbor       Uptime    Holdtime  DR Pri  
 eno2       172.31.250.45  00:00:24  00:01:21  100   

RP Info -

[root@server frr]# vtysh -c "show ip pim rp-info" 
 RP address    group/prefix-list  OIF   I am RP  Source  Group-Type  
 172.19.1.210  239.50.60.41/32    eno2  no       Static  ASM         

But, I am still not able to see the IGMP groups -

[root@server frr]# vtysh -c "show ip igmp groups" 
Total IGMP groups: 0
Watermark warn limit(Not Set): 0
Interface        Group           Mode Timer    Srcs V Uptime

Can someone point out if I am doing anything wrong?
The data source provider told me that they are not able to see any IGMP join request from my end.
Is my configuration correct ?

@Jafaral