Setup Guide

To view BGP routes matching a certain community number or a pre-defined BGP community, use the show ip bgp
community command in EXEC Privilege mode.
DellEMC>show ip bgp community
BGP table version is 3762622, local router ID is 10.114.8.48
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
* i 3.0.0.0/8 195.171.0.16 100 0 209 701 80 i
*>i 4.2.49.12/30 195.171.0.16 100 0 209 i
* i 4.21.132.0/23 195.171.0.16 100 0 209 6461 16422 i
*>i 4.24.118.16/30 195.171.0.16 100 0 209 i
*>i 4.24.145.0/30 195.171.0.16 100 0 209 i
*>i 4.24.187.12/30 195.171.0.16 100 0 209 i
*>i 4.24.202.0/30 195.171.0.16 100 0 209 i
*>i 4.25.88.0/30 195.171.0.16 100 0 209 3561 3908 i
*>i 6.1.0.0/16 195.171.0.16 100 0 209 7170 1455 i
*>i 6.2.0.0/22 195.171.0.16 100 0 209 7170 1455 i
*>i 6.3.0.0/18 195.171.0.16 100 0 209 7170 1455 i
*>i 6.4.0.0/16 195.171.0.16 100 0 209 7170 1455 i
*>i 6.5.0.0/19 195.171.0.16 100 0 209 7170 1455 i
*>i 6.8.0.0/20 195.171.0.16 100 0 209 7170 1455 i
*>i 6.9.0.0/20 195.171.0.16 100 0 209 7170 1455 i
*>i 6.10.0.0/15 195.171.0.16 100 0 209 7170 1455 i
*>i 6.14.0.0/15 205.171.0.16 100 0 209 7170 1455 i
*>i 6.133.0.0/21 205.171.0.16 100 0 209 7170 1455 i
*>i 6.151.0.0/16 205.171.0.16 100 0 209 7170 1455 i
--More--
Changing the LOCAL_PREFERENCE Attribute
In Dell EMC Networking OS, you can change the value of the LOCAL_PREFERENCE attribute, so that the preferred path can be
changed.
To change the default values of this attribute for all routes received by the router, use the following command.
● Change the LOCAL_PREF value.
CONFIG-ROUTER-BGP mode
bgp default local-preference value
value: the range is from 0 to 4294967295. The default is 100.
DellEMC# configure terminal
DellEMC(conf)# router bgp 400
DellEMC(conf_router_bgp)# neighbor 10.10.10.1 remote-as 500
DellEMC(conf_router_bgp)# bgp default local-preference 150
DellEMC(conf_router_bgp)# exit
In the above example configuration, the default LOCAL_PREFERENCE value is changed to 150 for all the updates from AS 500
to AS 400. The default value is 100.
To view the BGP configuration, use the show config command in CONFIGURATION ROUTER BGP mode or the show
running-config bgp command in EXEC Privilege mode.
Manipulating the LOCAL_PREFERENCE attribute
A more flexible method for manipulating the LOCAL_PREFERENCE attribute value is to use a route-map.
To change the usage of LOCAL_PREFERENCE attribute to choose the best path among the advertised, enter any or all of the
following commands.
1. Enter the ROUTE-MAP mode and assign a name to a route-map.
CONFIGURATION mode
route-map map-name [permit | deny] [sequence-number]
2. Change LOCAL_PREF value for routes meeting the criteria of this route-map.
208
Border Gateway Protocol (BGP)