Filtering Routing Information - Cisco 3845 - Security Bundle Router Software Manual

Configuring Protocol-Independent Features
Beginning in privileged EXEC mode, follow these steps to control route redistribution. Note that the
keywords are the same as defined in the previous procedure.
Command
Step 1 configure terminal
Step 2 router {bgp | rip | ospf | eigrp}
Step 3 redistribute protocol [process-id] {level-1 | level-1-2 |
level-2} [metric metric-value] [metric-type type-value]
[match internal | external type-value] [tag tag-value]
[route-map map-tag] [weight weight] [subnets]
Step 4
default-metric number
Step 5
default-metric bandwidth delay reliability loading mtu
Step 6
end
Step 7
show route-map
Step 8 copy running-config startup-config
To disable redistribution, use the no form of the commands.
The metrics of one routing protocol do not necessarily translate into the metrics of another. In these
situations, an artificial metric is assigned to the redistributed route. Uncontrolled exchanging of routing
information between different routing protocols can create routing loops and seriously degrade network
operation.
If you have not defined a default redistribution metric that replaces metric conversion, some automatic
metric translations occur between routing protocols:
•
•

Filtering Routing Information

You can filter routing protocol information by performing the tasks described in this section.
Note When routes are redistributed between OSPF processes, no OSPF metrics are preserved.
Cisco ME 3800X and 3600X Switch Software Configuration Guide
29-100
RIP can automatically redistribute static routes. It assigns static routes a metric of 1 (directly
connected).
Any protocol can redistribute other routing protocols if a default mode is in effect.
Chapter 29
Purpose
Enter global configuration mode.
Enter router configuration mode.
Redistribute routes from one routing protocol to
another routing protocol. If no route-maps are
specified, all routes are redistributed. If the keyword
route-map is specified with no map-tag, no routes are
distributed.
Cause the current routing protocol to use the same
metric value for all redistributed routes (BGP, RIP and
OSPF).
Cause the EIGRP routing protocol to use the same
metric value for all non-EIGRP redistributed routes.
Return to privileged EXEC mode.
Display all route maps configured or only the one
specified to verify configuration.
(Optional) Save your entries in the configuration file.
Configuring IP Unicast Routing
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