Configuring The Local Preference - Motorola BSR 2000 Configuration And Management Manual

Release 1.0
6. BGP uses the route with the shortest AS path.
7. BGP uses the route with the lowest origin type. IGP is lower than EGP, and EGP
8. BGP uses the route with the lowest MED. The comparison is made only if the
9. BGP uses the route with the lowest IGP metric to the BGP nexthop.
10. BGP prefers EBGP over IBGP. All confederation paths are considered IBGP.
11. If the best route and a new route are both external and maximum-paths <1-2> is
12. BGP prefers the path with the lowest IP address specified by the BGP router ID.

Configuring the Local Preference

When multiple paths exist to the same destination, the local preference specifies the
preferred path. The preferred path is the one with the higher preference value. To
configure the local preference of a BGP path, perform one of the following steps.
1. Use the bgp default local-preference command in Router Configuration mode to
2. Use a route map to set the local preference attribute.
Example: Setting the Local Preference
This example configures Routers New York and Boston so that AS 100 receives
updates for network 156.10.0.0 from AS 200 and AS 400 (as shown in
526360-001-00 Rev. B
is lower than INCOMPLETE.
neighboring AS is the same, except when the bgp always-compare-med
command is enabled.
enabled, BGP inserts the new route into the IP routing table as an alternate path.
EBGP multipath load sharing can occur at this point. The forwarding table holds
1 to 2 paths.
set the default local preference attribute in BGP updates:
MOT(config-bgp)#bgp default local-preference <0–4294967295>
where:
0–4294967295 is the local preference number.
MGBI
Configuring BGP
Figure 12-14).
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