Configuring Bgp Filtering With Route Maps - Cisco 3032 Software Configuration Manual

Configuring BGP
Command
Step 7
bgp bestpath med missing-as-worst
Step 8
bgp always-compare med
Step 9 bgp bestpath med confed
Step 10 bgp deterministic med
Step 11 bgp default local-preference value
Step 12 maximum-paths number
Step 13 end
Step 14 show ip bgp
show ip bgp neighbors
Step 15 copy running-config startup-config
Use the no form of each command to return to the default state.

Configuring BGP Filtering with Route Maps

Within BGP, route maps can control and modify routing information and t define the conditions by which
routes are redistributed between routing domains. See the
Information" section on page 38-96
that identifies the it (map tag) and an optional sequence number.
Beginning in privileged EXEC mode, follow these steps to use a route map to disable next-hop
processing:
Command
Step 1
configure terminal
Step 2
route-map map-tag [[permit | deny] |
sequence-number]]
Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
38-56
Purpose
(Optional) Configure the switch to consider a missing
MED as having a value of infinity, making the path
without a MED value the least desirable path.
(Optional) Configure the switch to compare MEDs for
paths from neighbors in different autonomous systems.
By default, MED comparison is only done among paths in
the same autonomous system.
(Optional) Configure the switch to consider the MED in
choosing a path from among those advertised by different
subautonomous systems within a confederation.
(Optional) Configure the switch to consider the MED
variable when choosing among routes advertised by
different peers in the same autonomous system.
(Optional) Change the default local-preference value. The
range is 0 to 4294967295; the default value is 100. The
highest local-preference value is preferred.
(Optional) Configure the number of paths to be added to
the IP routing table. The default is to only enter the best
path in the routing table. The range is from 1 to 16. Having
multiple paths allows load-balancing among the paths.
(Although the switch software allows a maximum of
32 equal-cost routes, the switch hardware never uses more
than 16 paths per route.)
Return to privileged EXEC mode.
Verify the reset by reviewing routing table information
and BGP neighbor information.
(Optional) Save your entries in the configuration file.
"Using Route Maps to Redistribute Routing
for more information about route maps. Each route map has a name
Purpose
Enter global configuration mode.
Create a route map, and enter route-map configuration mode.
Chapter 38 Configuring IP Unicast Routing
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