Filter Routes - Dell Force10 MXL Blade Configuration Manual

Filter Routes

To filter routes, use prefix lists. OSPF applies prefix lists to incoming or outgoing routes. Incoming routes
must meet the conditions of the prefix lists, and if they do not, OSPF does not add the route to the routing
table. Configure the prefix list in CONFIGURATION PREFIX LIST mode prior to assigning it to the
OSPF process, To do this, use the following commands.
Command Syntax
prefix-name
ip prefix-list
sequence-number
seq
[ge min-prefix-length] [le max-prefix-length]
For configuration information on prefix lists, refer to the
Route-maps
To apply prefix lists to incoming or outgoing OSPF routes, use the following commands in
CONFIGURATION-ROUTER OSPF mode.
Command Syntax
distribute-list prefix-list-name in [interface]
distribute-list prefix-list-name out [connected
| ospf <process-id> | rip | static]
378
| Open Shortest Path First (OSPFv2)
ip-prefix
{deny |permit}
chapter in the FTOS Configuration Guide
Command Mode
CONFIG-ROUTER-OSPF-id
CONFIG-ROUTER-OSPF-id
Command Mode Usage
CONFIGURATION Create a prefix list and assign it a unique
name. You are in PREFIX LIST mode.
CONFIG- PREFIX Create a prefix list with a sequence
LIST
number and a deny or permit action. The
optional parameters are:
ge min-prefix-length
length to be matched (0 to 32).
le max-prefix-length:
length to be matched (0 to 32).
IP Access Control Lists, Prefix Lists, and
.
: is the minimum prefix
is the maximum prefix
Usage
Apply a configured prefix list to
incoming OSPF routes.
Assign a configured prefix list to
outgoing OSPF routes.