Chapter 29
| IP Routing Commands
Border Gateway Protocol (BGPv4)
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backdoor network is treated as a local network, except that it not advertised by
the local router. A backdoor route should not be sourced at the local router, but
should be one that has been learned from external neighbors. However, since
these routes are treated as a local network, they are given priority over routes
learned through eBGP, even if the distance of the external route is shorter.
Example
Console(config-router)#network 172.16.0.0 255.255.0.0
Console(config-router)#
redistribute This command redistributes routes from one routing domain to another. Use the
no form to stop redistributing an previously configured entry.
Syntax
redistribute {connected | ospf | rip | static} [metric metric-value]
[route-map map-name]
no redistribute {connected | ospf | rip | static} [metric metric-value]
[route-map map-name]
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.
rip - External routes will be imported from the Routing Information
Protocol (RIP) 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)
map-name – Name of the route map. The route map can be used to filter
the networks to advertise, and to modify their weight or other attributes.
(Range: 1-80 characters)
Command Mode
Router Configuration
Default Setting
No redistribution is configured.
Command Usage
â—† Use this command to advertise routes that are learned by some other means,
such as from another routing protocol or static routing entries. Since all internal
routes are maintained by interior gateway protocols such as RIP and OSPF,
careful filtering should be used to ensure that only routes that need to be
advertised reach the Internet.
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