Dell Force10 Z9000 Configuration Manual page 210

Change MED attribute
By default, FTOS uses the MULTI_EXIT_DISC or MED attribute when comparing EBGP paths from the
same AS.
Use any or all of the following commands in the CONFIGURATION ROUTER BGP mode to change how
the MED attribute is used.
Command Syntax
bgp always-compare-med
bgp bestpath med {confed |
missing-as-best}
Use the
show config
values.
Change LOCAL_PREFERENCE attribute
In FTOS, you can change the value of the LOCAL_PREFERENCE attribute.
Use the following command in the CONFIGURATION ROUTER BGP mode to change the default values
of this attribute for all routes received by the router.
Command Syntax
bgp default local-preference value
Use the
show config
command in EXEC Privilege mode to view BGP configuration.
bgp
A more flexible method for manipulating the LOCAL_PREF attribute value is to use a route map.
Use these commands in the following sequence, starting CONFIGURATION mode to change the default
value of the LOCAL_PREF attribute for specific routes.
Step Command Syntax
1 route-map map-name [ permit |
deny ] [sequence-number]
| Border Gateway Protocol
210
Command Mode
CONFIG-ROUTER-
BGP
CONFIG-ROUTER-
BGP
command in the CONFIGURATION ROUTER BGP mode to view the nondefault
Command Mode
CONFIG-ROUTER-
BGP
command in CONFIGURATION ROUTER BGP mode or the
Command Mode
CONFIGURATION
Purpose
Enable MED comparison in the paths from neighbors
with different ASs.
By default, this comparison is not performed.
Change the bestpath MED selection to one of the
following:
confed : Chooses the bestpath MED comparison of
paths learned from BGP confederations.
missing-as-bes t: Treat a path missing an MED as
the most preferred one
Purpose
Change the LOCAL_PREF value.
value range: 0 to 4294967295
•
• Default is 100.
Purpose
Enter the ROUTE-MAP mode and assign a
name to a route map.
show running-config