DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
142 Switch Management and Operating Concepts
Description
3 Link-State
Request
4 Link-State Update
5 Link-State
Acknowledgment
Packet Length The length of the packet
in bytes. This length
includes the 24 byte
header.
Router ID The Router ID of the
packet’s source.
Area ID A 32-bit number
identifying the area that
this packet belongs to.
All OSPF packets are
associated with a single
area. Packets traversing
a virtual link are assigned
the backbone Area ID of
0.0.0.0
Checksum A standard IP checksum
that includes all of the
packet’s contents except
for the 64-bit
authentication field.
Authentication Type The type of authentication
to be used for the packet.
Authentication A 64-bit field used by the
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