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the Router ID you must first disable OSPF. After you set the new Router ID, you must re-enabl e
OSPF to have the change take effect. The default value is 0.0.0.0, althoug h this is not a valid Route r
ID.
Area ID - The ID of an OSPF area to which one of the router interfaces is conne cted. An Area ID is a
32 bit integer in dotted decimal format that uniquely identifies the area to which an interface is
connected.
LSA Type - The format and function of the link st ate advertisement. One of the following:
• Router Links
• Network Links
• Network Summary
• ASBR Summary
• AS-external
LS ID - The Link State ID identifies the piece of the routing domain that is being described by the
advertisement. The value of the LS ID depends on the advertisemen t 's LS type.
Age - The time since the link state advert i seme nt was first originated, in seconds.
Sequence - The sequence numbe r field is a signed 32-bit integer. It is used to detect old and
duplicate link state advertisements. The large r the sequence number, the more recent the
advertisement.
Checksum - The checksu m is used to detect data corruption of an advertisement. This corruption
can occur while an advertisement is being flooded, or while it is being held in a router' s memory. This
field is the checksum of the complete contents of the advertisement, except the LS age field.
Options - The Options field in the link st ate advertisement header indicates which optional
capabilities are associated with the advertisement. The options are:
• Q - This enables support for QoS Traffic Engineering.
• E - This describes the way AS-external-LSAs are flooded.
• MC - This describes the way IP multicast datagram s are forwarde d according to the standa rd
specifications.
• O - This describes whether Opaque-LSAs are supported.
• V - This describes whether OSPF++ extensions for VPN/COS are supported.
Command Buttons
Refresh - Refresh the data on the screen with the present state of the data in the switch.