Filter
Top Products
xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
149
Network Links Advertisements
Network links advertisements are Type 2 link state advertisements. A network links advertisement is originated for each transit
network in the area. A transit network is a multi-access network that has more than one attached router. The network links
advertisement is originated by the network’s designated router. The advertisement describes all routers 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
Options
Link-State ID
Advertising Router
Link-State Sequence Number
Link-State Checksum
Length
Network Link Advertisements
2
Network Mask
Attached Router
Figure 8- 27. Network Link Advertisements
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 fully adjacent to the Designated Router (DR)
are listed. The DR includes itself in this list.