DES-3326 Layer 3 Fast Ethernet Switch User’s Guide

The following fields can be set:

ParameterDescription

Interface Name

Allows the entry of the name of an IP interface previously

 

configured on the switch.

Area ID

Allows the entry of an OSPF Area ID configured above.

Router Priority

Allows the entry of a number between 1 and 255

 

representing the OSPF priority of the selected area. If a

 

Router Priority of 0 is selected, the switch cannot be elected

 

as the Designated Router for the network.

Hello Interval

Allows the specification of the interval between the

 

transmission of OSPF Hello packets, in seconds. Between

 

5 and 65535 seconds can be specified. The Hello Interval,

 

Dead Interval, Authorization Type, and Authorization Key

 

should be the same for all routers on the same network.

Dead Interval

Allows the specification of the length of time between the

 

receipt of Hello packets from a neighbor router before the

 

selected area declares that router down. An interval

 

between 5 and 65535 seconds can be specified. The Dead

 

Interval must be evenly divisible by the Hello Interval.

State

Allows the OSPF interface to be disabled for the selected

 

area without changing the configuration for that area.

Auth Type

This field can be toggled between None, Simple, and MD5

 

using the space bar. This allows a choice of authorization

 

schemes for OSPF packets that may be exchanged over the

 

OSPF routing domain. None specifies no authorization.

 

Simple uses a simple password to determine if the packets

 

are from an authorized OSPF router. When Simple is

 

selected, the Auth Key field allows the entry of a 8

 

character password that must be the same as a password

 

configured on a neighbor OSPF router. MD5 uses a

 

cryptographic key entered in the MD5 Key Table

 

Configuration menu. When MD5 is selected, the Auth Key

 

ID field allows the specification of the Key ID as defined in

 

the MD5 configuration above. This must be the same MD5

 

Key as used by the neighboring router.

Metric

This field allows the entry of a number between 1 and

 

65,535 that is representative of the OSPF cost of reaching

 

the selected OSPF interface. The default metric is 1.

 

 

Virtual Interface Configuration

Virtual Interfaces are used by OSPF to link areas that do not have a physical connection to the backbone (also called Area 0) or to link areas of the backbone itself that are discontinuous. This allows routing information to flow from an area that is physically disconnected from area 0 into area 0 by configuring an interface across one of the areas previously defined above.

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