Users Guide

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
Congure 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.
When you congure the auth-change-wait-time, OSPF sends out only the old authentication scheme until the wait timer
expires. After the wait timer expires, OSPF sends only the new authentication scheme. However, the new authentication scheme
does not take eect immediately after the authentication change wait timer expires; OSPF accepts both the old as well as new
authentication schemes for a time period that is equal to two times the congured authentication change wait timer. After this
time period, OSPF accepts only the new authentication scheme.
This transmission stops when the period ends.
The default is 0 seconds.
Conguring Virtual Links
Areas within OSPF must be connected to the backbone area (Area ID 0.0.0.0).
If an OSPF area does not have a direct connection to the backbone, at least one virtual link is required. Congure virtual links on an
ABR connected to the backbone.
• hello-interval — help packet
• retransmit-interval — LSA retransmit interval
• transmit-delay — LSA transmission delay
• dead-interval — dead router detection time
• authentication-key — authentication key
• message-digest-key — MD5 authentication key
To congure virtual links, use the following command.
• Congure the optional parameters of a virtual link.
CONFIG-ROUTEROSPF- id mode
area area-id virtual-link router-id [hello-interval seconds | retransmit-interval seconds
| transmit-delay seconds | dead-interval seconds | authentication-key key | message-
digest-key keyid md5 key]
– area ID: assigned earlier (the range is from 0 to 65535 or A.B.C.D).
Open Shortest Path First (OSPFv2)
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