Users Guide

● confed—Selects the best path MED comparison of paths learned from BGP confederations.
● missing-as-best—Treats a path missing an MED as the most preferred one.
● missing-as-worst—Treats a path missing an MED as the least preferred one.
Modify MED attributes
OS10(config)# router bgp 100
OS10(conf-router-bgp-100)# always-compare-med
OS10(conf-router-bgp-100)# bestpath med confed
Local preference attribute
You can change the value of the LOCAL_PREFERENCE attributes for all routes the router receives. To change the
LOCAL_PREF value in ROUTER-BGP mode from 0 to 4294967295 with default 100, use the default local preference
value command.
To view the BGP configuration, use the show running-configuration command. A more flexible method for manipulating
the LOCAL_PREF attribute value is to use a route-map.
1. Assign a name to a route map in CONFIGURATION mode.
route-map map-name {permit | deny | sequence-number}
2. Change the LOCAL_PREF value for routes meeting the criteria of this route map in ROUTE-MAP mode, then return to
CONFIGURATION mode.
set local-preference value
exit
3. Enter ROUTER-BGP mode.
router bgp as-number
4. Enter the neighbor to apply the route map configuration in ROUTER-BGP mode.
neighbor {ip-address}
5. Apply the route map to the neighbor’s incoming or outgoing routes in ROUTER-BGP-NEIGHBOR-AF mode.
route-map map-name {in | out)
6. Enter the peer group to apply the route map configuration in ROUTER-BGP mode.
template template-name
7. Apply the route map to the peer group’s incoming or outgoing routes in CONFIG-ROUTER-TEMPLATE-AF mode.
route-map map-name {in | out}
Configure and view local preference attribute
OS10(config)# route-map bgproutemap 1
OS10(conf-route-map)# set local-preference 500
OS10(conf-route-map)# exit
OS10(config)# router bgp 10
OS10(conf-router-bgp-10)# neighbor 10.1.1.4
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-bgp-neighbor-af)# route-map bgproutemap in
OS10 configure terminal
OS10(config)# route-map bgproutemap 1
OS10(conf-route-map)# set local-preference 500
OS10(conf-route-map)# exit
OS10(config)# router bgp 64601
OS10(conf-router-bgp-64601)# template bgppg
OS10(conf-router-template)# address-family ipv4 unicast
OS10(conf-router-bgp-template-af)# route-map bgproutemap in
Layer 3
815