Black Box LGB6026A, Management Manual

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C
HAPTER
47 | IP Routing Commands
Routing Information Protocol (RIP)
redistribute
This command imports external routing information from other routing
domains (that is, directly connected routes, protocols, or static routes) into
the autonomous system. Use the
no form to disable this feature.
S
YNTAX
[ no ] redistribute ( connected | ospf | static } [ metric metric-value ]
connected - Imports routes that are established automatically just
by enabling IP on an interface.
ospf - External routes will be imported from the Open Shortest Path
First (OSPF) protocol into this routing domain.
static - Static routes will be imported into this routing domain.
metric-value - Metric value assigned to all external routes for the
specified protocol. (Range: 1-16)
D
EFAULT
S
ETTING
redistribution - none
metric-value - set by the
default-metric command
C
OMMAND
M
ODE
Router Configuration
C
OMMAND
U
SAGE
◆
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.
◆
A route 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, 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.
E
XAMPLE
This example redistributes routes learned from OSPF and sets the metric
for all external routes imported from OSPF to a value of 3.
Console(config-router)#redistribute ospf metric 3
Console(config-router)#