3Com 5500-SI Configuration Manual page 262

262 C 16: IP R
HAPTER OUTING
P O
ROTOCOL PERATION
Perform the following configuration in Routing Protocol View.
Table 256 Configuring to import the routes of other protocols
Operation
Import routes of other protocols
Do not import routes of other
protocols
By default, the routes discovered by other protocols will not be distributed.
In different routing protocol views, the parameter options are different. For details,
refer to the description of the
Defining IP Prefix
A prefix list is identified by the IP Prefix name. Each IP Prefix can include multiple
items, and each item can specify the matching range of the network prefix forms. The
specifies the matching sequence in the prefix list.
index_number
Perform the following configurations in System View.
Table 257 Defining Prefix-list
Operation
Define a Prefix-list
Remove a Prefix-list
During the matching, the router checks list items identified by the
ascending order. If only one list item meets the condition, it means that it has passed
the filtering (and does not enter the testing of the next list item).
ip-prefix
If more than one IP prefix item is defined, then the match mode of at least one list
item should be the
permit
rapidly filter the routing information not satisfying the requirement, but if all the
items are in the
deny
define an item of
permit
multiple list items in the
Configuring the Filtering of Received Routes
Perform the following configuration in Routing Protocol View.
Define a policy that filters the routing information that does not satisfy the conditions
and receives routes with the help of an ACL or address prefix-list. The
command specifies that only the update packets from a specific neighboring
gateway
router will be received.
Command
import-route protocol [ cost cost ] [ tag
value ] type { 1 | 2 } [ route-policy
route_policy_name ]
undo import-route protocol
import-route
Command
ip ip-prefix ip_prefix_name [ index index_number ] {
permit | deny } network len [ greater-equal
greater_equal ] [ less-equal less_equal ]
undo ip ip-prefix ip_prefix_name [ index
index_number | permit | deny ]
mode. The list items of the
mode, no route will pass the
0.0.0.0/0
greater-equal
mode to let all the other routes pass.
deny
command for each protocol.
index_number
mode can be defined to
deny
filtering. You can
ip-prefix
0 32 after the
less-equal
in
filter-policy