15 Monitoring
15-90 VPN 3000 Concentrator Series User Guide

State

The state of the relationship with this neighboring OSPF router:
Down = (Red) The VPN Concentrator has received no recen t information from this neighbor. The
neighbor may be out of service, or it may not have been in service lo ng enough to establish its
presence (at startup).
Initializing = The VPN Concentrator has received a Hello packet from this neighbor, but it has
not yet established bidirectional communication.
Attempting = This state applies only to neighbors in an NBMA (Non-Broadcast Multi-Ac cess)
OSPF network. It indicates that the VPN Concentrator has received no recent information from this
neighbor, but it is trying to establish contact by sending Hello packets at the Hello Interval.
Two Way = The VPN Concentrator has established bidirectiona l communication with this neighbor,
but has not established adjacency; i.e., they are not exchanging routing information.
Exchange Start = The VPN Concentrator and this neighbor are in the first step of establishing an
adjacency relationship.
Exchanging = The VPN Concentrator is describing i ts entire link state database by sending
Database Description packets to this neighbor, to establish an adjacency relationship.
Loading = The VPN Concentrator is sending Link State Request packets to this neighbor asking
for the more recent LSAs that have been discovered but not yet received in the Exchange state.
Full = (Green) The VPN Concentrator is in a fully adjacent relationship with this neighbor. This
adjacency now appears in router LSAs and network LSAs.
Areas
This table shows a row of statistics for each OSPF Area.

Area ID

The Area ID identifies the subnet area within the OSPF Autonomous System or domain. While its format
is the same as an IP address, it functions only as an identifier and not an address. 0.0.0.0 identifies a
special area—the backbone—that contains all area border routers.

SPF Runs

The number of times that the system has calculated the intra-area route table (SPF, or Shortest Path First
table) using this area’s link-state database.

AS Border Routers

The total number of Autonomous System border routers re achable within this area.

Area Border Routers

The total number of area border routers reachable within this area.