D-Link DES-3326SRM - Switch - Stackable Product Manual page 179

recent. This is accomplished by examining the link state age, link state sequence number and link state checksum fields that
are also contained in the link state advertisement header.
The format of the Link State Advertisement Header is shown below:
Table 8. Link-State Advertisement Header
Field
Link State Age
Options
Link State Type
Link State ID
Advertising Router
Link State Sequence
Number
Link State Checksum
Length
D-Link DES-3326S Layer 3 Switch
Link-State Advertisement Header
Link-State Age
Link-State ID
Advertising Router
Link-State Sequence Number
Link-State Checksum
Description
The time is seconds since the link state advertisement was
originated.
The optional capabilities supported by the described portion of
the routing domain.
The type of the link state advertisement. Each link state type has
a separate advertisement format.
follows:
Type Description
1 Router Links
Network Links
Summary Link (IP Network)
Summary Link (ASBR)
AS External Link
This field identifies the portion of the internet environment that is
being described by the advertisement. The contents of this field
depend on the advertisement's Link State Type.
The Router ID of the router that originated the Link State
Advertisement. For example, in network links advertisements this
field is set to the Router ID of the network's Designated Router.
Detects old or duplicate link state advertisements.
instances of a link state advertisement are given successive Link
State Sequence numbers.
The Fletcher checksum of the complete contents of the link state
advertisement, including the link state advertisement header by
excepting the Link State Age field.
The length in bytes of the link state advertisement. This includes
the 20-byte link state advertisement header.
Options
Length
The link state type are as
169
Link-State Type
Successive