Exploring the quirks of Network Engineering
Scenario
Router configured with an eBGP neighbor that is 3 hops away. Maximum prefix is set to 15. Warning will be logged if 90% of that value is reached. Basic route dampening has been enabled as well.
IOS Config
router bgp 100
bgp log-neighbor-changes
neighbor 2.2.2.2 remote-as 200
neighbor 2.2.2.2 ebgp-multihop 3
neighbor 2.2.2.2 update-source Loopback0
!
address-family ipv4
no synchronization
bgp dampening
redistribute connected route-map LOCALS_ONLY
neighbor 2.2.2.2 activate
neighbor 2.2.2.2 maximum-prefix 15 90 warning-only
no auto-summary
exit-address-family
!
!
XR Config
router bgp 100
address-family ipv4 unicast
bgp dampening
redistribute connected
!
neighbor 2.2.2.2
remote-as 200
ebgp-multihop 3
update-source Loopback0
address-family ipv4 unicast
route-policy PASS_ALL in
maximum-prefix 15 90 warning-only
route-policy LOCALS_ONLY out
!
!
!