C
HAPTER
45
| IP Routing Commands
Routing Information Protocol (RIP)
– 1027 –
â—† The default metric must be used to resolve the problem of
redistributing external routes with incompatible metrics.
â—† It is advisable to use a low metric when redistributing routes from
another protocol into RIP. Using a high metric limits the usefulness of
external routes redistributed into RIP. For example, if a metric of 10 is
defined for redistributed routes, these routes can only be advertised to
routers up to 5 hops away, at which point the metric exceeds the
maximum hop count of 15. By defining a low metric of 1, traffic can
follow a imported route the maximum number of hops allowed within a
RIP domain. However, note that using a low metric can increase the
possibility of routing loops For example, this can occur if there are
multiple redistribution points and the router learns about the same
external network with a better metric from a redistribution point other
than that derived from the original source.
EXAMPLE
This example sets the default metric to 5.
Console(config-router)#default-metric 5
Console(config-router)#
RELATED COMMANDS
redistribute (1031)
distance This command defines an administrative distance for external routes
learned from other routing protocols. Use the no form to restore the
default setting.
SYNTAX
[no] distance distance network-address netmask [acl-name]
distance - Administrative distance for external routes. External
routes are routes for which the best path is learned from a neighbor
external to the local RIP autonomous system. Routes with a
distance of 255 are not installed in the routing table.
(Range: 1-255)
network-address - IP address of a route entry.
netmask - Network mask for the route. This mask identifies the
network address bits used for the associated routing entries.
acl-name - Name of the access control list. Any type of ACL can be
specified, including standard or extended IP ACLs and MAC ACLs.
(Range: 1-16 characters)
DEFAULT SETTING
None
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