Router Type	Description
AS Boundary Router (ASBR)	A router attached at the edge of an OSPF network is considered an AS Boundary Router (ASBR). An ASBR generally has one or more interfaces that run an Inter-Domain Routing Protocol (IDRP) such as BGP. In addition, any router distributing static routes or RIP routes into OSPF is considered an ASBR. The ASBR forwards routes learned from IDRP into the OSPF domain. In this way, routers inside the OSPF network learn about destinations outside their domain.
Area Border Router (ABR)	A router attached to two or more areas inside an OSPF network is considered an Area Border Router (ABR). ABRs play an important role in OSPF networks by limiting the amount of OSPF information that gets disseminated.
Internal Router (IR)	A router that only has interfaces within a single area inside an OSPF network is considered an Internal Router (IR). Unlike ABRs, IRs have topological information only about the area in which they are contained.
Designated Router (DR)	In a broadcast network, such as an Ethernet network that has more than one router locally attached, a single router is elected to be the Designated Router (DR) for that broadcast network. A DR assumes the responsibility of making sure all routers on the broadcast network are in synchronization with one another.
Backup Designated Router (BDR)	In a broadcast network, such as an Ethernet network, a Backup Designated Router (BDR) is elected in addition to the Designated Router (DR). The BDR can assume essentially the same responsibilities as the DR; if the DR fails, the BDR will assume the role of the DR in the broadcast network.
Other Router (OR)	In a broadcast network, such as an Ethernet network, any router not elected to be a Designated Router (DR) or Backup Designated Router (BDR) is considered to be an Other Router (OR).

In the Passport 1000 Series chassis, the router has OSPF global parameters that are used by all router interfaces using OSPF. Both isolated routing ports and virtual routing interfaces use the same OSPF global parameters.

Use the OSPF window to configure OSPF global parameters and to access other OSPF management tabs.


Item	Description
RouterID	The Router ID, which in OSPF has the same format as an IP Address but identifies the router independent of other routers in the OSPF domain.
AdminStat	The administrative status of OSPF in the router. The value "enabled" denotes that the OSPF process is active on at least one interface; "disabled" disables it on all interfaces.The default is disabled.
VersionNumber	Current version number of OSPF.
AreaBdrRtrStatus	A flag to note if this router is an area border router. Note: Area must be enabled to create a virtual router interface.
ASBdrRtrStatus	Enabled as true indicates the router is configured as an Autonomous System border router.
ExternalSACount	The number of external (LS type 5) link-state advertisements in the link-state database.
ExternalSACksumSum	The 32-bit unsigned sum of the LS checksums of the external link-state advertisements contained in the link-state database. This sum can be used to determine if there has been a change in a router's link state database and to compare the link-state databases of two routers.
OriginateNewLSAs	The number of new link-state advertisements that have been originated. This number is incremented each time the router originates a new LSA.
RxNewLSAs	The number of link-state advertisements received that are determined to be new instantiations. This number does not include newer instantiations of self-originated link-state advertisements.
10MbpsPortDefaultMetric	Indicates the cost associated with 10 Mb/s interface (port). The default is 100.
100MbpsPortDefaultMetric	Indicates the cost associated with 100 Mb/s interface (port). The default is 10.
1000MbpsPortDefaultMetric	Indicates the cost associated with 1000 Mb/s interface (port). The default is 1.
TrapEnable	Indicates whether or to enable not traps relating to the OSPF. The default is false.
AutoVirtLinkEnable	Enables or disables automatic creation of virtual links. The default is false.
SpfHoldDownTime	Allows the user to change the OSPF hold down timer value (3 to 60 seconds). The default is 10 seconds.
LastSpfRun	Used to indicate the time (SysUpTime) since the last SPF calculated by OSPF.