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DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Switch Management and Operating Concepts 161
attached to the network, including the Designated Router itself.
The advertisement’s Link State ID field lists the IP interface
address of the Designated Router.
The distance form the network to all attached routers is zero,
for all TOS. This is why the TOS and metric fields need not be
specified in the network links advertisement.
The format of the Network Links Advertisement is shown below:
Link-State Age
Optio
Link-State ID
Advertising Router
Link-State Sequence Num
Link-State Checksum
Network Link Advertisement
Network Mask
Attached Router
ns
ber
Length
s
2
Figure 5-30. Network Link Advertisement
Field Description
Network Mask The IP address mask for
the network.
Attached Router The Router Ids of each of
the routers attached to
the network. Only those
routers that are full
y