| Hi Fusan,
This info from the DECbrouter Documentation should help
Regards,
Neil Sheehan
NPS/NSTG Router Support
Redistribute Routing Information:
In addition to running multiple routing protocols simultaneously, the router
can redistribute information from one routing protocol to another.
For example, you can instruct the router to readvertise IP Enhanced
IGRP-derived routes using the RIP protocol You may also conditionally control
the redistribution of routes between routing domains by defining a method known
as route maps between the two domains.
To redistribute routes from one protocol into another, perform the following task in
router configuration mode:
Task: Redistribute routes from one routing protocol into another.
Command: distribute protocol autonomous-system-number [ route-map map-tag]
To define route maps, perform the following task in global configuration mode:
Task: Define any route maps needed to control redistribution.
Command: route-map map-tag {permit | deny} sequence-number
By default, the redistribution of default information between IP and Enhanced IGRP
processes is enabled.
Note:
Static routes that point to an interface will be advertised via RIP, IGRP, and
other dynamic routing protocols, regardless of whether redistribute static commands
were specified for those routing protocols. This is because static routes that point
to an interface are considered in the routing table to be connected and hence lose
their static nature. However, if you define a static route to an interface that is
not one of the networks defined in a network command, no dynamic routing protocols
will advertise the route unless a redistribute static command is specified for these
protocols.
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