Brocade Virtual ADX Switch and Router Guide (Supporting ADX v03.1.00) - Manual (Page 116)

102 Brocade Virtual ADX Switch and Router Guide
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Overview of OSPF
6
An Autonomous System Boundary Router (ASBR) is a router that is running multiple protocols and
serves as a gateway to routers outside an area and those operating with different protocols. The
ASBR is able to import and translate different protocol routes into OSPF through a process known
as redistribution. For more details on redistribution and configuration examples, refer to
“Enable
route redistribution” on page 127.
FIGURE 19 OSPF operating in a network
Designated routers in multi-access networks
In a network that has multiple routers attached, OSPF elects one router to serve as the designated
router (DR) and another router on the segment to act as the backup designated router (BDR). This
arrangement minimizes the amount of repetitive information that is forwarded on the network by
forwarding all messages to the designated router and backup designated routers responsible for
forwarding the updates throughout the network.