Command Reference Guide

3Com Router 5000 Family and Router 6000 Family import-route ● 161
Command Reference
Description For IS-IS, the routes discovered by other routing protocols are processed as the routes
outside the routing domain. When redistributing the routes of other protocols, you
can specify the default cost for them. If OSPF routes are redistributed, you can also
specify the cost type for them.
When IS-IS redistributes routes, you can specify to redistribute the routes to Level-1,
Level-2 or Level-1-2. If you do not specify the level, the system will redistribute the
routes to Level-2 routing table by default.
IS-IS regards all the routes redistributed into the routing domain as the external
routes, which describe the way how to select the routes to the destination outside the
routing domain.