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USER’S GUIDE
292 CyberSWITCH
OVER-SUBSCRIPTION TIMER
Over subscription is the situation in which there are more next-hop routers on the WAN that need
updates than there are channels available. When a WAN circuit goes down, a delay (per the over-
subscription timer) is incorporated in marking the routes unreachable. This allows the calls to time-
multiplex over the limited channels. Valid range for timer: 1 to 10,000 seconds; default: 180 seconds.
TRIGGERED RIP/SAP BACKGROUND INFORMATION
When there are a large number of remote destinations, the manual configuration of static routes
and services over WAN circuits can pose a burden on system management. Yet running RIP/SAP
could also be problematic; since these are broadcast protocols, periodic broadcasts may not be
feasible due to cost and bandwidth considerations. Enabling the Triggered RIP/SAP feature allows
the CyberSWITCH to send information on the WAN only when there has been an update to the
database or a change in the reachability of a next-hop router.
Specifically, triggered RIP and SAP updates are only transmitted on the WAN:
• when a specific request for a routing/service update has been received;
• when the routing or service databases are modified by new information from another interface
(in which case, only the latest changes are sent);
• when a destination has changed from an unreachable to a reachable state; and
• when the unit is powered up.
You may customize triggered RIP/SAP operation to your system’s specific needs through the
global timers. The global timers are user-controlled; they are described in detail in the Configuration
Elements section (page 291), and include the following:
• database timer
•hold-down timer
• retransmission timer
• polling timer
• over-subscription timer
IPX-SPECIFIC INFORMATION FOR DEVICES
Note: The Configuring Device Level Databases chapter contains general information needed to
configure on-node device entries. The following sections provide instructions for entering
on-node device information specific to IPX routing and/or bridging using the IPX Remote
LAN interface.
CONFIGURING IPX DEVICES
WAN DEVICES
USING CFGEDIT
1. Select Security from the main menu.
2. Select Device Level Databases from the security menu.
3. Select On-node Device Entries from the authentication database menu.