! FRR configuration for host (Rack1, Host 11)
! Pure L3 routing - NO BONDING
! Each NIC is a separate routed interface
! Loopback advertised via BOTH NICs creates ECMP automatically

! Host loopback: 10.0.1.11/32 (server identity / OVN TEP)
! eth0 → ToR-A (Network-A): 172.16.1.0/31 (host side)
! eth1 → ToR-B (Network-B): 172.16.1.2/31 (host side)

frr version 8.5.1
frr defaults traditional
hostname host-rack1-11
log syslog informational
service integrated-vtysh-config

! Enable BGP
router bgp 66111
 bgp router-id 10.0.1.11
 no bgp ebgp-requires-policy
 no bgp default ipv4-unicast

 ! Neighbor: ToR-A (Network-A)
 neighbor 172.16.1.1 remote-as 65101
 neighbor 172.16.1.1 description ToR-A-Rack1
 neighbor 172.16.1.1 ebgp-multihop 2
 neighbor 172.16.1.1 timers 3 10

 ! Neighbor: ToR-B (Network-B)
 neighbor 172.16.1.3 remote-as 65102
 neighbor 172.16.1.3 description ToR-B-Rack1
 neighbor 172.16.1.3 ebgp-multihop 2
 neighbor 172.16.1.3 timers 3 10

 ! Advertise host loopback via BOTH NICs
 ! Equal BGP attributes → ECMP automatically created
 address-family ipv4 unicast
  network 10.0.1.11/32
  maximum-paths 2
  neighbor 172.16.1.1 activate
  neighbor 172.16.1.1 route-map ADVERTISE-LOOPBACK out
  neighbor 172.16.1.3 activate
  neighbor 172.16.1.3 route-map ADVERTISE-LOOPBACK out
 exit-address-family

! Route map to advertise only loopback
route-map ADVERTISE-LOOPBACK permit 10
 match ip address prefix-list LOOPBACK-ONLY

! Prefix list for loopback
ip prefix-list LOOPBACK-ONLY seq 5 permit 10.0.1.11/32

line vty