Netgear XSM4348CS User Manual - Page 382

M4300 Intelligent Edge Series Fully Managed Stackable Switches The following table describes the nonconfigurable information that is displayed in the External Link State Database (LSDB) table. Table 137. OSPF External Link State Database Table Field Router ID LSA Type LS ID Age Sequence Checksum Description The 32-bit integer in dotted-decimal format that uniquely identifies the router within the autonomous system (AS). The router ID is set on the IP Configuration page. To change the router ID you must first disable OSPF. After you set the new router ID, you must reenable OSPF for the change to take effect. The default value is 0.0.0.0, although this is not a valid router ID. The format and function of the link state advertisement. LSA Type is one of the following: • ASBR Summary • AS-external • NSSA • TMP2 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 advertisement's LS type. The time since the link state advertisement was first originated, in seconds. The sequence number field is a signed 32-bit integer. It is used to detect old and duplicate link state advertisements. The larger the sequence number, the more recent the advertisement. The checksum 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. The following table describes the nonconfigurable information that is displayed in the AS Opaque Link State Database (LSDB) table. Table 138. OSPF AS Opaque Link State Database Table Field Router ID LSA Type Description The 32-bit integer in dotted-decimal format that uniquely identifies the router within the autonomous system (AS). The router ID is set on the IP Configuration page. To change the router ID you must first disable OSPF. After you set the new router ID, you must reenable OSPF for the change to take effect. The default value is 0.0.0.0, although this is not a valid router ID. The format and function of the link state advertisement. LSA Type is one of the following: • Area Opaque • AS Opaque • Link Opaque Configure OSPF and OSPFv3 382 User Manual