Netgear XCM8810 - 8800 SERIES 10-SLOT CHASSIS SWITCH ユーザーズマニュアル

Virtual links are also used to repair a discontiguous backbone area. For example, in 

, if the connection between ABR1 and the backbone fails, the connection using 

ABR2 provides redundancy so that the discontiguous area can continue to communicate with 
the backbone using the virtual link.

Link-Type Support

You can manually configure the OSPFv3 link type for a VLAN. 

 describes the link 

types.

The number of routers in an OSPFv3 point-to-point link is 

determined per VLAN, not per link.

All routers in the VLAN must have the same OSPFv3 link type. If 

there is a mismatch, OSPFv3 attempts to operate, but it may not be 
reliable.

Auto

Varies

XCM8800 automatically determines the OSPFv3 link type based on the 
interface type. This is the default setting.

Broadcast

Any

Routers must elect a designated router (DR) and a backup designated 
router (BDR) during synchronization. Ethernet is an example of a 
broadcast link.

Passive

A passive link does not send or receive OSPFv3 packets.

ABR 1

ABR 2

EX_045

Virtual link