Field
Description
Garbage Collection
Timer
Only for RFC 2453 Variable Timer =
,
The Garbage Collection Timer is started as soon as the route
timeout has expired.
After this timeout, the invalid route is deleted from the
IPROUTETABLE if no update is carried out for the route.
The default value is
(seconds).
Fields in the Timer for Triggered RIP (RFC 2091) menu.
Field
Description
Hold Down Timer
Only for RFC 2091 Variable Timer =
,
The hold down timer is activated as soon as your device re-
ceives an unreachable route (metric 16). The route may deleted
once this period has elapsed.
The default value is 120 (seconds).
Retransmission Timer
Only for RFC 2091 Variable Timer =
,
After this timeout, update request or update response packets
are sent again until an update flush or update acknowledge
packet arrives.
The default value is 5 (seconds).
15.2 OSPF
OSPF (Open Shortest Path First) is a dynamic routing protocol that is frequently used in
larger networks as an alternative to RIP. It was originally developed to avoid a number of
limitations of RIP (when used in larger networks).
The problems (with RIP) avoided by OSPF include:
• Reduced network load: After a short initialization phase, routing information is not sent
periodically as with RIP, but only changed routing information.
• Authentication: Gateway authentication can be configured to increase the security when
exchanging routing information.
• Routing Traffic Control: Gateways can be combined to form areas to limit the traffic cre-
ated by exchanging routing information.
15 Routing Protocols
Teldat GmbH
246
bintec Rxxx2/RTxxx2
