3Com Switch 7700 Configuration Manual page 152

144 C 5: IP R
HAPTER OUTING
P O
ROTOCOL PERATION
Configuring IS-IS to Import Routes of Other Protocols
For IS-IS, the routes discovered by other routing protocols are processed as routes
outside the routing domain. When importing the routes of other protocols, you
can specify their default cost.
When IS-IS imports routes, you can also specify whether to import the routes into
Level-1, Level-2 or Level-1-2.
Perform the following configurations in IS-IS view..
Table 82 Importing Routes of Other Protocols
Operation
Import routes of other protocols
Configure not to import routes from other
protocols
If the level is not specified in the command for importing the route, it defaults to
importing the routes into level-2.
protocol specifies the routing protocol sources that can be imported, which can be
direct, static, rip, bgp, and ospf, etc.
By default, IS-IS does not import routing information from any other protocols.
For more about importing routing information, see "IP Routing Policy".
Configuring IS-IS Route Filtering
The IS-IS protocol can filter the received and distributed routes according to the
access control list specified by acl-number.
Perform the following configurations in IS-IS view.
Configuring for Filtering of the Routes Received by IS-IS
Table 83 Configuring for Filtering of Received Routes
Operation
Allow filtering of received routes
Prevent filtering of received routes
Configuring for Filtering the Distributed Routes
Table 84 Configuring for Filtering of Distributed Routes
Operation
Allow filtering of routes distributed by IS-IS
Prevent filtering of routes distributed by IS-IS
By default, IS-IS does not filter received and distributed routing information.
Command
import-route protocol [ cost value | type {
external | internal } | [ level-1 | level-1-2 |
level-2 ] | route-policy route-policy-name ] *
undo import-route protocol [ cost value |
type { external | internal } | [ level-1 |
level-1-2 | level-2 ] | route-policy
route-policy-name ] *
Command
filter-policy acl-number import
undo filter-policy acl-number import
Command
filter-policy acl-number out protocol
undo filter-policy acl-number out protocol