...
route-map BGP_OUT
rule 1
action permit
exit
exit
router bgp 1
address-family ipv4
neighbor 192.168.1.1<ipaddr>
remote-as 2
route-map BGP_OUT out
enable
exit
enable
exit
exitРешение:
Настроим Конфигурация BGP на ESR:
| Блок кода |
|---|
router bgp |
...
log-neighbor-changes router bgp 2500 |
...
router-id 185.0.0.1 neighbor 185.0.0.2 |
...
remote-as 20
|
...
update-source 185.0.0.1
|
...
address-family ipv4 unicast enable |
...
exit
|
...
enable exit |
...
address-family ipv4 unicast |
...
redistribute connected exit |
...
enable exit |
...
interface |
...
gigabitethernet 1/0/1 ip firewall disable |
...
ip address 185.0.0.1/24
exit
interface gigabitethernet 1/0/2
ip firewall disable
ip address 172.16.1.1/24
exit |
Далее создадим необходимые правила для фильтрации маршрутов и добавим в конфигурацию BGP:
| Блок кода |
|---|
route-map in rule 10 |
...
match ip address 198.51.100.0/24 eq 28 exit |
...
Теперь осталось прикрепить route-map к BGP:
...
rule 20
match ip address 203.0.113.0/24 ge 30
exit
rule 30
match ip address 203.0.96.0/20 le 24
exit
exit
route-map OUT
rule 1
exit
exit
router bgp log-neighbor-changes
router bgp 2500
router-id 185.0.0.1
neighbor 185.0.0.2
remote-as 20
update-source 185.0.0.1
address-family ipv4 unicast
route-map in in
route-map OUT out
enable
exit
enable
exit
address-family ipv4 unicast
redistribute connected
exit
enable
exit
interface gigabitethernet 1/0/1
ip firewall disable
ip address 185.0.0.1/24
exit
interface gigabitethernet 1/0/2
ip firewall disable
ip address 172.16.1.1/24
exit |
Вывод диагностических команд:
| Блок кода |
|---|
esr-200# show bgp neighbors BGP neighbor is 185.0.0.2 BGP state: Established Neighbor address: 185.0.0.2 Neighbor AS: 20 Neighbor ID: 185.0.0.2 Neighbor caps: refresh enhanced-refresh restart-aware AS4 Session: external AS4 Source address: 185.0.0.1 Weight: 0 Hold timer: 140/180 Keepalive timer: 1/60 Address family ipv4 unicast: Default originate: No Default information originate: No Incoming route-map: in Outgoing route-map: OUT Uptime: 1588 s esr-200# esr-200# sh bgp ipv4 unicast neighbor 185.0.0.2 advertise-routes Status codes: u - unicast, b - broadcast, m - multicast, a - anycast * - valid, > - best Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path * u 172.16.1.0/24 185.0.0.1 -- -- -- 2500 ? * u 185.0.0.0/24 185.0.0.1 -- -- -- 2500 ? esr-200# esr-200# sh bgp ipv4 unicast neighbor 185.0.0.2 routes Status codes: u - unicast, b - broadcast, m - multicast, a - anycast * - valid, > - best Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path *> u 198.51.100.0/28 185.0.0.2 -- 100 0 20 i *> u 203.0.96.0/23 185.0.0.2 |
...
-- |
...
100 0 20 i *> u 203.0.113.0/30 185.0.0.2 -- |
...
100 |
...
|
...
|
...
0 20 i |