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xStack
Reserved
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.
DES-3810 Series Layer 3 Managed Ethernet Switch Web UI Reference Guide
Routers Links Advertisements
Link-State Age
Link-State Sequence Number
Link-State Checksum
V
E
B
Reserved
Type
No. Of TOS
TOS
0
...
0
TOS
Figure 6-28 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
Length
Number of Links
Link ID
Link Data
TOS 0 Metric
Metric
...
Link ID
Link Data
187
Link-State Type
Metric
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