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DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Switch Management and Operating Concepts 157
Field Description
V – bit 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).
E – bit When set, the router is an
Autonomous System (AS)
boundary router (E is for
External).
B – bit When set, the router is an
area border router (B is
for Border).
Number of Links The number of router
links described by this
advertisement. This must
be the total collection of
router links to the area.
Table 5-20. Routers Links Advertisement
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.
Field Description