BGP does not have a neighbor with the peer. It is not in the routing table.
I think it may be something with the image.
RP/0/0/CPU0:ISP#sh runn
Fri May 2 13:04:06.978 UTC
Building configuration...
!! IOS XR Configuration
RP/0/0/CPU0:SP#sh route
Fri May 2 13:17:25.197 UTC
Codes: C - connected, S - static, R - RIP, B - BGP, (>) - Diversion path
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - ISIS, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, su - IS-IS summary null, * - candidate default
U - per-user static route, o - ODR, L - local, G - DAGR, l - LISP
A - access/subscriber, a - Application route
M - mobile route, r - RPL, (!) - FRR Backup path
Gateway of last resort is not set
C 100.10.1.0/30 is directly connected, 00:25:45, GigabitEthernet0/0/0/1
L 100.10.1.2/32 is directly connected, 00:25:45, GigabitEthernet0/0/0/1
6.1.3
!! LasRP/0/0/CPU0:ISP#show bgp trace error
Fri May 2 13:06:47.727 UTC
RP/0/0/CPU0:ISP#t configuration change at Thu May 1 20:23:38 2025 by admin
!
hostname ISP
logging events buffer-size 1024
interface MgmtEth0/0/CPU0/0
shutdown
!
interface GigabitEthernet0/0/0/0
shutdown
!
interface GigabitEthernet0/0/0/1
ipv4 address 100.10.1.1 255.255.255.252
!
interface GigabitEthernet0/0/0/2
shutdown
!
route-policy rp-bgp-allow-all
pass
end-policy
!
router bgp 1
bgp router-id 100.10.1.1
address-family ipv4 unicast
!
neighbor 100.10.1.2
remote-as 2
update-source GigabitEthernet0/0/0/1
address-family ipv4 unicast
route-policy rp-bgp-allow-all in
route-policy rp-bgp-allow-all out
soft-reconfiguration inbound
!
RP/0/0/CPU0:ISP#show bgp summary
Fri May 2 13:05:32.932 UTC
BGP router identifier 100.10.1.1, local AS number 1
BGP generic scan interval 60 secs
Non-stop routing is enabled
BGP table state: Active
Table ID: 0xe0000000 RD version: 4
BGP main routing table version 4
BGP NSR Initial initsync version 3 (Reached)
BGP NSR/ISSU Sync-Group versions 0/0
BGP scan interval 60 secs
BGP is operating in STANDALONE mode.
Process RcvTblVer bRIB/RIB LabelVer ImportVer SendTblVer StandbyVer
Speaker 4 4 4 4 4 0
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd
100.10.1.2 0 2 16 16 4 0 0 00:13:44 0
RP/0/0/CPU0:ISP#show bgp trace error
Fri May 2 13:06:47.727 UTC
RP/0/0/CPU0:ISP#sh route
Fri May 2 13:08:43.079 UTC
Codes: C - connected, S - static, R - RIP, B - BGP, (>) - Diversion path
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - ISIS, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, su - IS-IS summary null, * - candidate default
U - per-user static route, o - ODR, L - local, G - DAGR, l - LISP
A - access/subscriber, a - Application route
M - mobile route, r - RPL, (!) - FRR Backup path
Gateway of last resort is not set
C 100.10.1.0/30 is directly connected, 00:20:07, GigabitEthernet0/0/0/1
L 100.10.1.1/32 is directly connected, 00:20:07, GigabitEthernet0/0/0/1
RP/0/0/CPU0:ISP#
RP/0/0/CPU0:ISP#ping 100.10.1.2
Fri May 2 13:10:12.863 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 100.10.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/5/9 ms
==============================================================================
RP/0/0/CPU0:SP#sh runn
Fri May 2 13:11:28.331 UTC
Building configuration...
!! IOS XR Configuration 6.1.3
!! Last configuration change at Thu May 1 20:23:05 2025 by admin
!
hostname SP
interface MgmtEth0/0/CPU0/0
shutdown
!
interface GigabitEthernet0/0/0/0
shutdown
!
interface GigabitEthernet0/0/0/1
ipv4 address 100.10.1.2 255.255.255.252
!
interface GigabitEthernet0/0/0/2
shutdown
!
route-policy rp-bgp-allow-all
pass
end-policy
!
router bgp 2
bgp router-id 100.10.1.2
address-family ipv4 unicast
!
neighbor 100.10.1.1
remote-as 1
update-source GigabitEthernet0/0/0/1
address-family ipv4 unicast
route-policy rp-bgp-allow-all in
route-policy rp-bgp-allow-all out
soft-reconfiguration inbound
!
end
RP/0/0/CPU0:SP#show bgp summary
Fri May 2 13:12:41.206 UTC
BGP router identifier 100.10.1.2, local AS number 2
BGP generic scan interval 60 secs
Non-stop routing is enabled
BGP table state: Active
Table ID: 0xe0000000 RD version: 4
BGP main routing table version 4
BGP NSR Initial initsync version 3 (Reached)
BGP NSR/ISSU Sync-Group versions 0/0
BGP scan interval 60 secs
BGP is operating in STANDALONE mode.
Process RcvTblVer bRIB/RIB LabelVer ImportVer SendTblVer StandbyVer
Speaker 4 4 4 4 4 0
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd
100.10.1.1 0 1 23 23 4 0 0 00:20:52 0
RP/0/0/CPU0:SP#show bgp trace error
Fri May 2 13:16:43.330 UTC
RP/0/0/CPU0:SP#
RP/0/0/CPU0:SP#sh route
Fri May 2 13:17:25.197 UTC
Codes: C - connected, S - static, R - RIP, B - BGP, (>) - Diversion path
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - ISIS, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, su - IS-IS summary null, * - candidate default
U - per-user static route, o - ODR, L - local, G - DAGR, l - LISP
A - access/subscriber, a - Application route
M - mobile route, r - RPL, (!) - FRR Backup path
Gateway of last resort is not set
C 100.10.1.0/30 is directly connected, 00:25:45, GigabitEthernet0/0/0/1
L 100.10.1.2/32 is directly connected, 00:25:45, GigabitEthernet0/0/0/1
RP/0/0/CPU0:SP#ping 100.10.1.1
Fri May 2 13:19:03.220 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 100.10.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/4/9 ms
