Concept Guide

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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.
Example conguration of changing the LOCAL_PREFERENCE attribute
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 conguration, 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 conguration, 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 exible 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.
CONFIG-ROUTE-MAP mode
set local-preference value
3 Return to CONFIGURATION mode.
CONFIG-ROUTE-MAP mode
exit
4 Enter ROUTER BGP mode.
CONFIGURATION mode
228
Border Gateway Protocol (BGP)