D-Link xStack Reference Manual page 219

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xStack DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch Web UI Reference Guide
Reserved
TOS
In router links advertisements, the Link State ID field is set to the router's OSPF Router ID. The T-bit is set in the
advertisement's Option field if and only if the router is able to calculate a separate set of routes for each IP Type of
Service (TOS). Router links advertisements are flooded throughout a single area only.
Parameter
V-bit
E-bit
B-bit
Number of Links
The following fields are used to describe each router link. Each router link is typed. The Type field indicates the
kind of link being described. It may be a link to a transit network, to another router or to a stub network. The values
of all the other fields describing a router link depend on the link's Type. For example, each link has an associated
32-bit data field. For links to stub networks, this field specifies the network's IP address mask. For other link types,
the Link Data specifies the router's associated IP interface address.
Routers Links Advertisements
Link-State Age
Link-State Sequence Number
Link-State Checksum
V E B
Reserved
Type No. Of TOS
TOS
0
...
0
Figure 6-36 Routers Links Advertisements
Description
When set, the router is an endpoint of an active virtual link that is using the described
area as a Transit area (V is for Virtual link endpoint).
When set, the router is an Autonomous System (AS) boundary router (E is for External).
When set, the router is an area border router (B is for Border).
The number of router links described by this advertisement. This must be the total
collection of router links to the area.
Options
Link-State ID
Advertising Router
Number of Links
Link ID
Link Data
TOS 0 Metric
...
Link ID
Link Data
218
Link-State Type
Length
Metric
Metric