bgp no advertise
时间: 2024-04-30 22:19:48 浏览: 11
BGP (Border Gateway Protocol) "no advertise" is a command used to prevent a BGP router from advertising specific routes to its peers. This command can be useful in situations where a specific route should not be advertised to a particular neighbor or group of neighbors.
For example, if you have a network with multiple routers and you want to prevent a specific router from advertising a particular route, you can use the "no advertise" command on that router. This will ensure that the route is not advertised to any of its BGP peers.
Here's an example of how to use the "no advertise" command in BGP:
```
router bgp 65000
neighbor 192.168.1.1 remote-as 65001
neighbor 192.168.1.1 route-map NO-ADVERTISE out
!
route-map NO-ADVERTISE deny 10
match ip address prefix-list NO-ADVERTISE-LIST
!
ip prefix-list NO-ADVERTISE-LIST seq 5 deny 10.0.0.0/8
ip prefix-list NO-ADVERTISE-LIST seq 10 permit 0.0.0.0/0 le 32
```
In this example, we're preventing the router from advertising any routes that match the prefix list "NO-ADVERTISE-LIST" to its neighbor at IP address 192.168.1.1. The "route-map" command specifies that the "NO-ADVERTISE" route map should be used for outgoing advertisements to this neighbor. The "NO-ADVERTISE" route map denies any routes that match the prefix list "NO-ADVERTISE-LIST". The prefix list itself specifies that any routes with a prefix of 10.0.0.0/8 should be denied, while all other routes should be permitted. Therefore, the router will not advertise any routes with a prefix of 10.0.0.0/8 to its neighbor at 192.168.1.1.