Cyclades-PR4000

Area Menu (continued)

Area Range N Status

An Area Border Router (ABR) advertises link states for all networks within the area.

 

The number of such advertisements can potentially be reduced by condensing

 

different IP networks into a single range.

Area Range N Net

Applies when Area Range N Status is Active.

Address

Sets the network IP address for the range.

Area Range N Mask

Applies when Area Range N Status is Active.

 

Sets the network IP mask for the range.

STEP FIVE

The CONFIG =>IP =>OSPF =>NEIGHBORS menu is required if the router uses OSPF over non-broadcast multi- access interfaces such as X.25 and Frame Relay. If this is the case, set the parameters described in the following table.

Neighbors Menu CONFIG=>IP =>OSPF =>NEIGHBORS

Parameter

Description

 

Interface

Link for which neighbors will be defined. In the OSPF example, consider link 1 of

 

 

Router 3.

 

Neighbor's IP

The router ID of the neighboring router. For Router 3, link 1, use the router ID of router

 

 

1.

 

Neighbor's Status

Enable includes link in OSPF database.

 

 

Enable Inactive leaves link in OSPF database, but router at end of link (Router 1 in this

 

 

case) no longer passes OSPF information.

 

 

Disable deactivates neighbor link and erases Neighbor’s IP.

 

Neighbor's Priority

Priority used by OSPF in multicast networks to elect the designated router. A priority of

 

 

1 will make this router the most likely to be chosen. A priority of 2 will make it second

 

 

most likely. Set it to 0 (zero) if this router should never be the designated router. An

 

 

example can be seen in Area 1 in the figure -- Router 1 should never be the

 

 

Designated Router because it does not have a direct link to Router 2. Either Router 0

 

 

or Router 3 should be chosen.

 

Chapter 11 - Routing Protocols

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Avocent Cyclades-PR4000 installation manual Applies when Area Range N Status is Active