BGP - route map extension (explanation + configuration)

——Route-map Extended general form ：

Ip policy-list aaa per/deny

 Match …………（ The prefix list /ACL....）

Route-map bbb per 10// stay Route-map bbb call policy-list aaa

  Match policy-list aaa// Meet the conditions

  continue 20// If the above conditions are met, jump to Route-map bbb per 20, Do the following ：

  Set ……..

                                                                                                                              ———— Nested calls

—— Case list （1）： 

R3 To configure ：

access-list 1 permit 192.168.1.0 0.0.0.255

ip policy-list aaa permit

 match ip address 1

route-map aaa permit 10

 match policy-list aaa

 continue 30// If the above conditions are met, jump to To route-map aaa permit 30

!

route-map aaa permit 20// There is no condition

 set weight 8888

!

route-map aaa permit 30// Meet the conditions

 set weight 7777

r3(config)#do show  ip bgp

BGP table version is 3, local router ID is 3.3.3.3

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

              r RIB-failure, S Stale

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

   Network          Next Hop            Metric LocPrf Weight Path

*> 192.168.1.0      13.1.1.1                 0          7777 100 i

*> 192.168.2.0      13.1.1.1                 0          8888 100 i

r3(config)#

* normal route-map The following can be done at the same time match Many conditions are executing one set sentence

—— Case list （2）：

R1:

Ip as-path access-list 1 per _200$  Route from 200

Ip prefix-list aaa per 0.0.0.0/0    I only accept the default route

Route-map aaa per 10//Route-map Multiple conditions can be matched

 Match as-path 1------------------------------- And relationships

 Match ip add prefix-list aaa----------------- And relationships

 Set weight 200

Route-map aaa per 20

 Match ip add prefix-list aaa

 Set  weight 100

Router bgp 213

  Nei r2 route-map aaa in

  Nei r3 route-map aaa in