ip pim rp-address ‘ip address’ override

R2 R1

R2:
interface Serial0/0
ip address 183.1.123.2 255.255.255.0
ip authentication mode eigrp 100 md5
ip authentication key-chain eigrp 100 EIGRP
ip pim sparse-mode
encapsulation frame-relay
no ip split-horizon eigrp 100
clock rate 2000000
no arp frame-relay
frame-relay map ip 183.1.123.1 201 broadcast
frame-relay map ip 183.1.123.3 203 broadcast
no frame-relay inverse-arp

interface Loopback0
ip address 100.2.2.2 255.255.255.0
ip pim sparse-mode
ip igmp join-group 239.1.1.1

no ip pim dm-fallback
ip pim bsr-candidate Serial0/0 0
ip pim rp-candidate Serial0/0

R2#sh ip pim bsr-router
PIMv2 Bootstrap information
This system is the Bootstrap Router (BSR)
BSR address: 183.1.123.2 (?)
Uptime: 00:07:24, BSR Priority: 0, Hash mask length: 0
Next bootstrap message in 00:00:14
Candidate RP: 183.1.123.2(Serial0/0)
Holdtime 150 seconds
Advertisement interval 60 seconds
Next advertisement in 00:00:05

R2#sh ip pim rp
Group: 239.1.1.1, RP: 183.1.123.1, v2, uptime 00:04:04, expires 00:02:24

R1:
interface Serial0/0
ip address 183.1.123.1 255.255.255.0
ip authentication mode eigrp 100 md5
ip authentication key-chain eigrp 100 EIGRP
ip pim sparse-mode
encapsulation frame-relay
clock rate 2000000
no arp frame-relay
frame-relay map ip 183.1.123.2 102 broadcast
frame-relay map ip 183.1.123.3 102
no frame-relay inverse-arp
no ip pim dm-fallback
ip pim bsr-candidate Serial0/0 0
ip pim rp-candidate Serial0/0

R1#sh ip pim bsr-router
PIMv2 Bootstrap information
BSR address: 183.1.123.2 (?)
Uptime: 00:03:53, BSR Priority: 0, Hash mask length: 0
Expires: 00:01:17
This system is a candidate BSR
Candidate BSR address: 183.1.123.1, priority: 0, hash mask length: 0
Candidate RP: 183.1.123.1(Serial0/0)
Holdtime 150 seconds
Advertisement interval 60 seconds
Next advertisement in 00:00:25

R1(config)#ip pim rp-address 100.2.2.2
R1(config)#do sh ip pim rp
Group: 239.1.1.1, RP: 183.1.123.1, v2, next RP-reachable in 00:01:00
Group: 224.0.1.40, RP: 100.2.2.2, uptime 00:00:05, expires never

R1(config)#ip pim rp-address 100.2.2.2 override
R1(config)#do sh ip pim rp
Group: 239.1.1.1, RP: 100.2.2.2, uptime 00:00:02, expires never
Group: 224.0.1.40, RP: 100.2.2.2, uptime 00:00:21, expires never

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