RuggedCom RuggedRouter RX1100 - Manual (Page 180)

17. Configuring Dynamic Routing
Revision 1.14.3 180 RX1000/RX1100™
17.2.5.3. RIP Interfaces
Figure 17.19. RIP Interfaces
Parameters specific to one interface are configured here.
Each interface on the router is listed. Clicking on settings displays a menu of configuration options
for that interface.
Clicking "Remove inactive interfaces" purges the list of any interfaces which are no longer configured
on the router.
The Passive Interface option controls if an interface is active or passive. Passive interfaces do not
send RIP updates to other routers.
The Receive Version field controls which versions of RIP messages will be accepted from. Either
version 1, 2 or both versions can be accepted. By default both RIP versions are accepted.
The Send Version field controls which versions of RIP messages to send to other routers. Either
version 1, 2 or both versions can be sent. By default only RIP version 2 messages are sent.
The Authentication fields choose the authentication mode this port uses. A port can either use no
authentication, use a specific authentication string (used the same was as the string in a key), or use
a specific key chain's settings. By default no authentication is used.
The Authentication mode field chooses the mode of authentication used. Options are plain text (the
default), MD5 following the RIP authentication RFC, and MD5 using the method used by the old ripd
implementation.
The Use Split Horizon field controls use of the RIP split-horizon feature (RIP v2 only). It can be
disabled or enabled, and if enabled it can optionally enable the poisoned reverse feature. Split horizon
controls whether routes learned through an interface should be allowed to be advertised back out that
interface. By default RIP advertises all routes it knows about to everyone, which makes it take a very
long time for dropped links to age out of the network. The split horizon prevents advertising those
routes back out the same interface which helps to control this problem. Some network topologies with
rings of routers will still have some issues with aging out dead routes even with split horizon enabled
but they will still age out faster. If fast network recovery is desired, use OSPF.