Shulou(Shulou.com)06/01 Report--

1. Experimental topology:

Note: Only R2 and R3 routers are used here.

II. Experimental requirements:

1. Add Lo1:20.20.20.20 after R2 and announce that it is in BGP process;

2. Deploy static routing outbound interfaces on R3 (must be yes, otherwise inheritance occurs);

3. R3 announces 20.20.20.20 under BGP process;

4. Grab traffic on R3 and deploy route-map so that the next hop of the optimal path of 20.20.20.20 is 2.2.2.2.

5. Check whether the next hop of route 20.20.20.20 on R3 is 0.0.0.0. Is there a loop risk?

6. Verify: After deployment 4, whether the next hop of the optimal path is 2.2.2.2

III. Command deployment:

1, 2, 3 Deployment:

R2(config)#int lo1

R2(config-if)#ip add 20.20.20.20 255.255.255.0

R2(config)#router bgp 123

R2(config-router)#network 20.20.20.0 mask 255.255.255.0

R3(config)#ip route 20.20.20.0 255.255.255.0 f0/0

R3(config)#router bgp 123

R3(config-router)#network 20.20.20.0 mask 255.255.255.0

4. Deployment:

R3(config)#access-list 10 permit 20.20.20.0 0.0.0.255

R3(config)#route-map pl permit 10

R3(config-route-map)#match ip address 10

R3(config-route-map)#set weight 32768

R3(config-route-map)#route-map pl permit 20

R3(config-route-map)#match ip address 10

R3(config-route-map)#set local-preference 200

R3(config-route-map)#route-map permit 1000

R3(config)#router bgp 123

R3(config-router)#neighbor 2.2.2.2 route-map pl in

IV. Verification:

1, 2, 3 Verification after deployment:

R3#show ip bgp

Network Next Hop Metric LocPrf Weight Path

*> 20.20.20.0/24 0.0.0.0 0 32768 I

i 2.2.2.2 0 100 0 i

R2#show ip bgp

Network Next Hop Metric LocPrf Weight Path

i20.20.20.0/24 3.3.3.3 0 100 0 i

*> 0.0.0.0 0 32768 i

4. Verification after deployment:

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