From Internetworkpro
| This page or section provides device configuration instructions
Please note that the information on this page has not been checked for accuracy and is not intended as a replacement to documentation. Please ensure you understand your desired objectives before attempting to apply any examples listed. See more examples at Category:Configuration |
[edit] Triggering Router
interface Null0
no ip unreachables
!
interface Loopback0
ip address 10.0.0.1 255.255.255.255
router bgp 65000
no synchronization
no bgp client-to-client reflection
bgp log-neighbor-changes
redistribute static route-map black-hole-trigger
neighbor ibgp-peers peer-group
neighbor ibgp-peers remote-as 65000
neighbor ibgp-peers route-reflector-client
neighbor x.x.x.x peer-group ibgp-peers
no auto-summary
!
route-map black-hole-trigger permit 10
match tag 666
set ip next-hop 10.255.255.255
set local-preference 200
set origin igp
set community no-export
!
route-map black-hole-trigger deny 20
[edit] Edge Router
interface Null0
no ip unreachables
!
interface Loopback0
ip address 10.0.0.10 255.255.255.255
!
interface GigabitEthernet0/1
ip verify unicast reverse-path
!
router bgp 65000
no synchronization
bgp log-neighbor-changes
neighbor ibgp-peers peer-group
neighbor 10.0.0.10 remote-as 65000
ip route 10.255.255.255 255.255.255.255 Null0
[edit] Triggering a Black Hole
ip route 172.18.192.1 255.255.255.255 Null0 tag 666
ip route 172.16.54.0 255.255.255.0 Null0 tag 666
