NETGEAR M4350-24F4V 24-Port 10G SFP+ Managed AV Network Switch - Manual (Page 480)

Table 117. Link State Database (Continued)
Description Field
The checksum of the complete contents of the advertisement, except the LS age field.
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.
Checksum
The Options field in the link state advertisement header indicates which optional
capabilities are associated with the advertisement:
• Q: Enables support for QoS traffic engineering.
• E: Specifies the way AS external LSAs are flooded.
• MC: Specifies the way IP multicast datagrams are forwarded according to the
standard specifications.
• O: Specifies if opaque LSAs are supported.
• V: Specifies if OSPF extensions for class of service (CoS) and VPN are supported.
Options
Table 118. External LSDB table
Description Field
A 32-bit number in dotted-decimal format that identifies the switch within the
autonomous system (AS). To change the router ID, you must first disable OSPF. After
you set a 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. Router ID
The format and function of the link state advertisement:
ASBR Summary; AS-external; NSSA; or TMP2.
LSA Type
The link state ID identifies the part of the routing domain that is being described by
the advertisement. The value of the LS ID depends on the advertisement’s LS type. LS ID
The time in seconds since the link state advertisement was first originated. Age
A signed 32-bit integer that is used to detect old and duplicate link state
advertisements. The larger the sequence number, the more recent the advertisement. Sequence
The checksum of the complete contents of the advertisement, except the LS age field.
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.
Checksum
Main User Manual 480 Configure OSPF and OSPFv3
Fully Managed Switches M4350 Series Main User Manual