BGP LU problem

[rumka760]

Good day!
I've got problem with BGP LU on the FRR.
Problem description:
When I try to use BGP-LU session establish between 2.2.2.4 and 3.3.3.4. Peer 3.3.3.4 starting receiving routes labled-unicast from host, but after some time I've got errors:
2024-11-06 14:06:18.636 [ERR!] bgpd: [TXY0T-CYY6F][EC 100663299] Can't get remote address and port: Transport endpoint is not connected
2024-11-06 14:06:18.636 [ERR!] bgpd: [P90Z5-FP0GJ][EC 33554461] 2.2.2.4: nexthop_set failed, local: 3.3.3.4:35517 remote: (null)p update_if: (None) resetting connection - intf (Unknown)
2024-11-06 14:06:18.636 [DEBG] bgpd: [T91AW-FGMHW] bgp_fsm_change_status : vrf default(0), Status: Connect established_peers 0
Also after this errors I could't ping 2.2.2.4 and 100.1.1.2. With BGP Ipv4 unicast I don't have this problem.
Can anyone help me solve this problem?
Thank you!

Host Loopback 2.2.2.4 ---int 100.1.1.2------100.1.1.1------3.3.3.4 FRR loopback
BGP LU <--------------------------------------------------->BGP LU

[pguibert6WIND]

@rumka760 , can you pls join a config for this ?

[rumka760]

Current configuration:
!
frr version 10.1
frr defaults traditional
hostname BGP-RR
log file //bgp.log
log syslog informational
no ipv6 forwarding
bgp no-rib
service integrated-vtysh-config
!
ip prefix-list to-n3com seq 5 permit 3.0.0.0/8 ge 27 le 28
ip prefix-list to-n3com seq 10 permit 1.0.0.0/8 ge 31 le 32
ip prefix-list to-n3com seq 20 permit 111.0.0.0/8 ge 28 le 32
!
ip route 0.0.0.0/0 172.18.21.254
ip route 2.2.2.1/32 100.1.1.2
ip route 2.2.2.2/32 100.1.1.2
ip route 2.2.2.4/32 100.1.1.2
!
interface ens3
ip address 100.1.1.1/24
mpls enable
exit
!
interface ens10
ip address 9.1.1.2/30
ip ospf area 0.0.0.0
ip ospf network point-to-point
exit
!
interface ens11
ip address 172.18.21.200/24
exit
!
interface lo
ip address 3.3.3.1/32
ip address 3.3.3.2/32
ip address 3.3.3.4/32
exit
!
interface lo:1
ip address 3.3.3.1/32
exit
!
router bgp 65001
bgp cluster-id 6.6.6.6
bgp route-reflector allow-outbound-policy
neighbor N3COM peer-group
neighbor 10.2.0.3 remote-as 65001
neighbor 10.2.0.3 peer-group N3COM
neighbor 10.2.0.3 update-source 3.3.3.4
neighbor 2.2.2.1 remote-as 65001
neighbor 2.2.2.1 update-source 3.3.3.1
neighbor 2.2.2.2 remote-as 65001
neighbor 2.2.2.2 shutdown
neighbor 2.2.2.2 update-source 3.3.3.4
neighbor 2.2.2.3 remote-as 65001
neighbor 2.2.2.3 update-source 3.3.3.2
neighbor 2.2.2.4 remote-as 65001
neighbor 2.2.2.4 update-source 3.3.3.4
neighbor 10.2.0.4 remote-as 65001
neighbor 10.2.0.4 update-source 3.3.3.1
!
address-family ipv4 unicast
no neighbor 10.2.0.3 activate
neighbor 2.2.2.1 soft-reconfiguration inbound
no neighbor 2.2.2.2 activate
neighbor 2.2.2.3 route-reflector-client
neighbor 2.2.2.3 route-map to-n3com out
no neighbor 2.2.2.4 activate
neighbor 10.2.0.4 route-reflector-client
neighbor 10.2.0.4 route-map to-n3com out
exit-address-family
!
address-family ipv4 labeled-unicast
neighbor 10.2.0.3 activate
neighbor 10.2.0.3 route-reflector-client
neighbor 10.2.0.3 route-map to-n3com out
neighbor 2.2.2.4 activate
neighbor 2.2.2.4 default-originate
neighbor 2.2.2.4 soft-reconfiguration inbound
exit-address-family
exit
!
router ospf
ospf router-id 2.2.2.1
redistribute connected
redistribute static
exit
!
route-map to-n3com permit 10
match ip address prefix-list to-n3com
set local-preference 777
exit
!
end

[rumka760]

Good day!
As long as the BGP session has not started, I can ping 2.2.2.4 from the FRR. After the BGP session state (established) appears, I can't ping 2.2.2.4.

[donaldsharp]

show ip route 2.2.2.4 before and after please

[rumka760]

BGP-RR# show ip route 2.2.2.4
Routing entry for 2.2.2.4/32
Known via "static", distance 1, metric 0, best
Last update 01w0d04h ago

• 100.1.1.2, via ens3, weight 1

BGP-RR#

[rumka760]

24-11-21 08:29:46.534 [ERR!] bgpd: [TXY0T-CYY6F][EC 100663299] Can't get remote address and port: Transport endpoint is not connected
2024-11-21 08:29:46.534 [ERR!] bgpd: [P90Z5-FP0GJ][EC 33554461] 2.2.2.4: nexthop_set failed, local: 3.3.3.4:41107 remote: (null)p update_if: (None) resetting connection - intf (Unknown)
BGP-RR# show ip route 2.2.2.4
Routing entry for 2.2.2.4/32
Known via "static", distance 1, metric 0, best
Last update 01w0d18h ago

• 100.1.1.2, via ens3, weight 1

[rumka760]

FRR run as VM