3com S7906E Manuel De Montage

 

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The local preference is used to determine the best route for traffic leaving the local AS. When a BGP 

router obtains from several iBGP peers multiple routes to the same destination but with different next 

hops, it considers the route with the highest local preference as the best route.  

This task allows you to specify the default local preference for routes sent to iBGP peers. 

Follow these steps to specify the default local preference: 

Enter system view 

— 

Enter BGP view 

bgp as-number 

— 

Configure the default local preference 

default local-preference 
value 

Optional 

100 by default 

 

MED is used to determine the best route for traffic going into an AS. When a BGP router obtains from 

eBGP peers multiple routes to the same destination but with different next hops, it considers the route 

with the smallest MED value as the best route if other conditions are the same. 

Follow these steps to configure the default MED value: 

Enter system view 

— 

Enter BGP view 

bgp as-number 

— 

Configure the default MED value 

default med med-value 

Optional 

0 by default 

 

Follow these steps to enable the comparison of MED of routes from different ASs: 

Enter system view 

— 

Enter BGP view 

bgp as-number 

— 

Enable the comparison of MED of 
routes from different ASs  

Required 

Not enabled by default 

 

Route learning sequence may affect optimal route selection.