BGP Local-Preference Configuration

Cisco BGP Local-Preference Configuration using Dynamips/Dynagen

Topology

Configuration Settings Overview

Local Preference Attribute

Control the exit from AS65000 to 5.5.5.5/32 by its own AS.

show bgp ipv4 unicast (show ip bgp) (excerpt form show command below)

R1#sh bgp ipv4 unicast
     Network        Next Hop     LocPrf  
 *>i 5.5.5.5/32     11.11.11.11     110  ===> Local Preference 110
 * i 10.5.5.0/24    11.11.11.11     100  
 *>i                10.10.10.10     100  ===> lowest BGP neighbor router-id

R10#sh bgp ipv4 unicast
     Network        Next Hop     LocPrf  
 *   5.5.5.5/32     10.2.10.2            
 *>i                11.11.11.11     110  ===> Local Preference 110
 *>  10.5.5.0/24    10.2.10.2            ===> prefer eBGP route
 * i                11.11.11.11     100

R11#sh bgp ipv4 unicast
     Network        Next Hop     LocPrf  
 *>  5.5.5.5/32     10.3.11.3       110  ===> Local Preference 110
 * i 10.5.5.0/24    10.10.10.10     100  
 *>                 10.3.11.3            ===> prefer eBGP route

Dynagen Config File / Router Config

1.  Dynagen .net file

2.  R1

3.  R2

4.  R3

5.  R4

6.  R5

7.  R10

8.  R11

show command

R1  : sh ip route
    : sh bgp ipv4 unicast summary
    : sh bgp ipv4 unicast
R10 : sh ip route
    : sh bgp ipv4 unicast summary
    : sh bgp ipv4 unicast
R11 : sh ip route
    : sh bgp ipv4 unicast summary
    : sh bgp ipv4 unicast

1.  R1

2.  R10

3.  R11

Dynalconf HOME