ECS4660-28F_Management Guide-R03

C HAPTER 51 | IP Routing Commands
Routing Information Protocol (RIP)
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RELATED COMMANDS
ip route (1724)
redistribute (1739)
default-metric This command sets the default metric assigned to external routes imported
from other protocols. Use the no form to restore the default value.
SYNTAX
default-metric metric-value
no default-metric
metric-value – Metric assigned to external routes. (Range: 1-15)
DEFAULT SETTING
1
COMMAND MODE
Router Configuration
COMMAND USAGE
◆ This command does not override the metric value set by the
redistribute command. When a metric value has not been configured by
the redistribute command, the default-metric command sets the
metric value to be used for all imported external routes.
◆ The default metric must be used to resolve the problem of
redistributing external routes with incompatible metrics.
◆ 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 (1739)