This is happening throughout the entire topology with eBGP peers. I can ping the physical interface but cannot ping the loopback address. It appears no neighborship is forming.
I configured both ways -- ebgp-multihop 2 and also ebgp-multihop 1 between R6 and R7 while testing - both failed. I also configured update-source lo0 between R6 and R7 to see if that would work but it did not, although it did work in iBGP between R1 to R2 and R1 to R3.
I am using a Cisco IOL OS on eve-ng and am wondering if I have met a software limitation. If anyone could review my configs and let me know if I configured it properly, I would be grateful.
To prevent clutter I am going to post the config only of R6 and R7
R6 Configuration
R6#show run Building configuration... Current configuration : 1819 bytes ! ! Last configuration change at 15:54:07 CST Thu Feb 11 2021 ! version 15.5 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R6 ! boot-start-marker boot-end-marker ! ! ! no aaa new-model ! ! ! bsd-client server url https://cloudsso.cisco.com/as/token.oauth2 clock timezone CST -6 0 mmi polling-interval 60 no mmi auto-configure no mmi pvc mmi snmp-timeout 180 ! ! ! ! ! no ip icmp rate-limit unreachable ! ! ! ! ! ! ! ! ! no ip dhcp use vrf connected ! ! ! no ip domain lookup ip cef no ipv6 cef ! multilink bundle-name authenticated ! ! ! ! ! ! ! cts logging verbose ! ! ! redundancy ! no cdp log mismatch duplex ! ip tcp synwait-time 5 ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 6.6.6.6 255.255.255.255 ! interface Ethernet0/0 ip address 10.1.36.6 255.255.255.0 ! interface Ethernet0/1 no ip address shutdown ! interface Ethernet0/2 no ip address shutdown ! interface Ethernet0/3 no ip address shutdown ! interface Ethernet1/0 no ip address shutdown ! interface Ethernet1/1 ip address 10.1.67.6 255.255.255.0 ! interface Ethernet1/2 no ip address shutdown ! interface Ethernet1/3 no ip address shutdown ! router bgp 777 bgp log-neighbor-changes neighbor 3.3.3.3 remote-as 5500 neighbor 3.3.3.3 ebgp-multihop 2 neighbor 7.7.7.7 remote-as 711 neighbor 7.7.7.7 ebgp-multihop 2 neighbor 7.7.7.7 update-source Loopback0 neighbor 10.1.36.3 remote-as 5500 neighbor 10.1.67.7 remote-as 711 ! ip forward-protocol nd ! ! no ip http server no ip http secure-server ! ! ! ! control-plane ! ! ! ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 logging synchronous stopbits 1 line aux 0 exec-timeout 0 0 privilege level 15 logging synchronous stopbits 1 line vty 0 4 login transport input none ! ! end
R7 Configuration
R7#show run Building configuration... Current configuration : 1876 bytes ! ! Last configuration change at 15:55:05 CST Thu Feb 11 2021 ! version 15.5 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R7 ! boot-start-marker boot-end-marker ! ! ! no aaa new-model ! ! ! bsd-client server url https://cloudsso.cisco.com/as/token.oauth2 clock timezone CST -6 0 mmi polling-interval 60 no mmi auto-configure no mmi pvc mmi snmp-timeout 180 ! ! ! ! ! no ip icmp rate-limit unreachable ! ! ! ! ! ! ! ! ! no ip dhcp use vrf connected ! ! ! no ip domain lookup ip cef no ipv6 cef ! multilink bundle-name authenticated ! ! ! ! ! ! ! cts logging verbose ! ! ! redundancy ! no cdp log mismatch duplex ! ip tcp synwait-time 5 ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address 7.7.7.7 255.255.255.255 ! interface Loopback1 ip address 200.60.2.1 255.255.255.0 ! interface Ethernet0/0 ip address 10.1.57.7 255.255.255.0 ! interface Ethernet0/1 no ip address shutdown ! interface Ethernet0/2 no ip address shutdown ! interface Ethernet0/3 no ip address shutdown ! interface Ethernet1/0 no ip address shutdown ! interface Ethernet1/1 ip address 10.1.67.7 255.255.255.0 ! interface Ethernet1/2 no ip address shutdown ! interface Ethernet1/3 no ip address shutdown ! router bgp 711 bgp log-neighbor-changes neighbor 5.5.5.5 remote-as 911 neighbor 5.5.5.5 ebgp-multihop 2 neighbor 6.6.6.6 remote-as 777 neighbor 6.6.6.6 ebgp-multihop 2 neighbor 6.6.6.6 update-source Loopback0 neighbor 10.1.57.5 remote-as 911 neighbor 10.1.67.6 remote-as 777 ! ip forward-protocol nd ! ! no ip http server no ip http secure-server ! ! ! ! control-plane ! ! ! ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 logging synchronous stopbits 1 line aux 0 exec-timeout 0 0 privilege level 15 logging synchronous stopbits 1 line vty 0 4 login transport input none ! ! end
