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

Set the BGP routing policy according to the community attribute of BGP routing

R1 configuration:

Loopback0 1.1.1.1

Loopback1 192.168.1.1/24

Loopback2 192.168.2.1/24

Loopback3 192.168.3.1/24

Loopback4 192.168.4.1/24

E1/0 10.1.12.1

R2 configuration:

Loopback 2.2.2.2

E1/0 10.1.12.2

Configure IGP (RIP) to maintain connectivity:

R1 configuration:

Router rip

Version 2

Network 1.0.0.0

Network 10.0.0.0

Network 192.168.1.0

Network 192.168.2.0

Network 192.168.3.0

Network 192.168.4.0

No auto-summary

R2 configuration:

Router rip

Version 2

Network 2.0.0.0

Network 10.0.0.0

No auto-summary

Start configuring BGP (EBGP):

R1

Router bgp 109

Bgp router-id 1.1.1.1

Bgp log-neighbor-changes

Network 1.1.1.1 mask 255.255.255.255

Network 10.1.12.0 mask 255.255.255.0

Network 192.168.1.0

Network 192.168.2.0

Network 192.168.3.0

Network 192.168.4.0

Neighbor 10.1.12.2 remote-as 110

R2

Router bgp 110

Bgp router-id 2.2.2.2

Bgp log-neighbor-changes

Network 1.1.1.1 mask 255.255.255.255

Network 10.1.12.0 mask 255.255.255.0

Neighbor 10.1.12.1 remote-as 109

Neighbor 10.1.12.1 route-map set_local_pref in

R2#sh ip bgp

BGP table version is 7, local router ID is 2.2.2.2

Status codes: s suppressed, d damped, h history, * valid, > best, I-internal

R RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter

X best-external, an additional-path, c RIB-compressed

Origin codes: I-IGP, e-EGP,?-incomplete

RPKI validation codes: V valid, I invalid, N Not found

Network Next Hop Metric LocPrf Weight Path

* > 1.1.1.1 Compact 32 10.1.12.1 1 32768 I

* > 10.1.12.0 Compact 24 0.0.0.0 32768 I

* > 192.168.1.0 10.1.12.1 0 200 0 109 I

* > 192.168.2.0 10.1.12.1 0 200 0 109 I

* > 192.168.3.0 10.1.12.1 0 150 0109 I

* > 192.168.4.0 10.1.12.1 0 150 0109 I

R1 configure Community Properties

Step 1: turn on the router support community attribute

Ip bgp-community new-format

Step 2, configure the prefix-list list

Ip prefix-list 1 permit 192.168.1.0/24

Ip prefix-list 1 permit 192.168.2.0/24

Ip prefix-list 2 permit 192.168.3.0/24

Ip prefix-list 2 permit 192.168.4.0/24

Step 3, configure route-map set_community

Route-map set_community permit 10

Match ip address prefix-list 1

Set community 109:1

Route-map set_community permit 20

Match ip address prefix-list 2

Set community 109:2

The fourth step is to call the

Neighbor 10.1.12.2 send-community

Neighbor 10.1.12.2 route-map set_community out

Route-map set_local_pref is configured on R2 to match the routes with community attributes passed by R1 and attach a specific local-preference

Step 1: turn on the router support community attribute

Ip bgp-community new-format

Step 2: set the list of community properties

Ip prefix-list 1 seq 5 permit 192.168.2.0/24

Ip prefix-list 1 seq 10 permit 192.168.4.0/24

Step 3:

Route-map set_local_pref permit 10

Match community 1

Set local-preference 200

Route-map set_local_pref permit 20

Match community 2

Set local-preference 150

Step 4: call route-map set_local_pref in BGP

Neighbor 10.1.12.1 route-map set_local_pref in

Verify the configuration:

R2#sh ip bgp

BGP table version is 7, local router ID is 2.2.2.2

Status codes: s suppressed, d damped, h history, * valid, > best, I-internal

R RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter

X best-external, an additional-path, c RIB-compressed

Origin codes: I-IGP, e-EGP,?-incomplete

RPKI validation codes: V valid, I invalid, N Not found

Network Next Hop Metric LocPrf Weight Path

* > 1.1.1.1 Compact 32 10.1.12.1 1 32768 I

* > 10.1.12.0 Compact 24 0.0.0.0 32768 I

* > 192.168.1.0 10.1.12.1 0 200 0 109 I

* > 192.168.2.0 10.1.12.1 0 200 0 109 I

* > 192.168.3.0 10.1.12.1 0 150 0109 I

* > 192.168.4.0 10.1.12.1 0 150 0109 I

R2#sh ip bgp 192.168.1.0

BGP routing table entry for 192.168.1.0/24, version 2

Paths: (1 available, best # 1, table default)

Not advertised to any peer

Refresh Epoch 1

one hundred and nine

10.1.12.1 from 10.1.12.1 (1.1.1.1)

Origin IGP, metric 0, localpref 200, valid, external, best

Community: 109:1

Rx pathid: 0, tx pathid: 0x0

The community attribute learned from R1 is to set the local priority to 200 for the route Community: 109. 1.

R2#sh ip bgp 192.168.3.0

BGP routing table entry for 192.168.3.0/24, version 4

Paths: (1 available, best # 1, table default)

Not advertised to any peer

Refresh Epoch 1

one hundred and nine

10.1.12.1 from 10.1.12.1 (1.1.1.1)

Origin IGP, metric 0, localpref 150, valid, external, best

Community: 109:2

Rx pathid: 0, tx pathid: 0x0

The community attribute learned from R1 is to set the local priority to 150 for the route Community: 109 2.

Routes that are not matched are passed at default values.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.