Administrator Guide

Dell(conf-if)#end
Dell#show ip ospf 34 interface
TengigabitEthernet 0/0 is up, line protocol is up
Internet Address 10.1.2.100/24, Area 2.2.2.2
Process ID 34, Router ID 10.1.2.100, Network Type BROADCAST, Cost: 45
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 10.1.2.100, Interface address 10.1.2.100
Backup Designated Router (ID) 10.1.2.100, Interface address 0.0.0.0
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:06
Neighbor Count is 0, Adjacent neighbor count is 0
Dell#
Enabling OSPFv2 Authentication
To enable or change various OSPF authentication parameters, use the following commands.
● Set a clear text authentication scheme on the interface.
CONFIG-INTERFACE mode
ip ospf authentication-key key
Configure a key that is a text string no longer than eight characters.
All neighboring routers must share password to exchange OSPF information.
● Set the authentication change wait time in seconds between 0 and 300 for the interface.
CONFIG-INTERFACE mode
ip ospf auth-change-wait-time seconds
This setting is the amount of time OSPF has available to change its interface authentication type.
During the auth-change-wait-time, OSPF sends out packets with both the new and old authentication schemes.
This transmission stops when the period ends.
The default is 0 seconds.
Creating 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. 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.
● Create a prefix list and assign it a unique name.
CONFIGURATION mode
ip prefix-list prefix-name
You are in PREFIX LIST mode.
● Create a prefix list with a sequence number and a deny or permit action.
CONFIG- PREFIX LIST mode
seq sequence-number {deny |permit} ip-prefix [ge min-prefix-length] [le max-prefix-
length]
The optional parameters are:
○ ge min-prefix-length: is the minimum prefix length to match (from 0 to 32).
○ le max-prefix-length: is the maximum prefix length to match (from 0 to 32).
For configuration information about prefix lists, refer to Access Control Lists (ACLs).
Applying Prefix Lists
To apply prefix lists to incoming or outgoing OSPF routes, use the following commands.
● Apply a configured prefix list to incoming OSPF routes.
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Open Shortest Path First (OSPFv2 and OSPFv3)