Allied Telesis AT-9724TS General Ospf Settings, Ospf Area ID Setting, Current Route ID

Field	Description
Network Mask	The IP address mask for the advertised destination.
E – bit	The type of external metric. If the E - bit is set, the metric specified is a Type 2 external metric.This means the
	metric is considered larger than any link state path. If the E - bit is zero, the specified metric is a Type 1 external
Forwarding Address	metric.This means that is comparable directly to the link state metric.
	Data traffic for the advertised destination will be forwarded to this address. If the Forwarding Address is set to
TOS	0.0.0.0, data traffic will be forwarded instead to the advertisement’s originator.
	The Type of Service that the following cost is relevant to.
Metric	The cost of this route.The interpretation of this metric depends on the external type indication (the E - bit
External Route Tag	above).
	A 32-bit field attached to each external route.This is not used by the OSPF protocol itself.

General OSPF Settings

The OSPF General Setting menu allows OSPF to be enabled or disabled on the Switch – without changing the Switch’s OSPF configuration.

From the Layer 3 IP Networking folder, open the OSPF folder and click on the OSPF General Setting link.To enable OSPF, first supply an OSPF Route ID (see below), select Enabled from the State drop-down menu and click the Apply button.

		Figure 6- 111. OSPF Global Settings window
The following parameters are used for general OSPF configuration:
	Parameter	Description
	OSPF Route ID	A 32-bit number (in the same format as an IP address – xxx.xxx.xxx.xxx) that uniquely identifies the Switch in
		the OSPF domain. It is common to assign the highest IP address assigned to the Switch (router). In this case, it
		would be 10.53.13.189, but any unique 32-bit number will do. If 0.0.0.0 is entered, the highest IP address
	Current Route ID	assigned to the Switch will become the OSPF Route ID.
		Displays the OSPF Route ID currently in use by the Switch.This Route ID is displayed as a convenience to the
	State	user when changing the Switch’s OSPF Route ID.
		Allows OSPF to be enabled or disabled globally on the Switch without changing the OSPF configuration.

OSPF Area ID Setting

This menu allows the configuration of OSPF Area IDs and to designate these areas as either Normal or Stub. Normal OSPF areas allow Link-State Database (LSDB) advertisements of routes to networks that are external to the area. Stub areas do not allow the LSDB advertisement of external routes. Stub areas use a default summary external route (0.0.0.0 or Area 0) to reach external destinations.

To set up an OSPF Area configuration click Configuration > Layer 3 IP Networking > OSPF > OSPF Area ID Settings link to open the following dialog box:

Figure 6- 112. OSPF Area ID Settings and Table window

Allied Telesyn AT-9724TS High-Density Layer 3 Stackable Gigabit Ethernet Switch 117