Switch User Manual

IP routing conﬁguration using the Java Device Manager 249

Age The age of the link state advertisement in seconds.

Checksum The checksum of the complete content of the

advertisement, excluding the Age ﬁeld. This ﬁeld

is excluded so that the advertisement’s age can

be increased without updating the checksum. The

checksum used is the same as that used in ISO

connectionless datagrams and is commonly referred

to as the Fletcher checksum.

Click Refresh to update the information.

—End—

External Link State Database information

The Ext. Link State Database tab of the OSPF dialog is used to view

external link state information. To view OSPF external link states, use the

following procedure:

Step Action

Select IP Routing > OSPF from the Device Manager menu. The

OSPF dialog will open. Select the Ext. Link State Database tab.

This tab is illustrated below.

OSPF dialog - Ext. Link State Database tab

Using the ﬁelds provided, view the external link state database.

These ﬁelds are described in the following table.

Ext. Link State Database ﬁelds

Field Description

Type The type of link state advertisement. Each link

state type has a separate advertisement format.

Nortel Ethernet Routing Switch 5500 Series

Conﬁguration-IP Routing Protocols

NN47200-503 03.01 Standard

5.1 27 August 2007