Compatible Systems 5.4 - Manual (Page 68)

62 Chapter 3 - IPX Routing & Bridging
connection is up, network traffic passing across the link causes the inactivity
timer for the link to be reset, keeping the connection up.
The IPX RIP protocol periodically sends out update information across a link.
These periodic update packets will cause a WAN interface set for
dial-on-demand operation to either stay up indefinitely, or to continuously
dial, connect, and then drop the connection.
• If Triggered is selected with this pull-down menu, the device will
modify the standard IPX RIP behavior for this interface to send IPX RIP
packets only when there has been an update to its routing table informa-
tion, or when it has detected a change in the accessibility of the next hop
router.
• If Periodic is selected with this pull-down menu, the device will use the
standard IPX RIP protocol, which sends RIP packets over the link based
on the RIP Update Timer value set below.
RIP Update Timer
This value dictates how often the device sends out IPX RIP (Routing Infor-
mation Protocol) packets on the WAN link attached to this interface. The RIP
packets sent out on this interface contain information about networks for
which this device is responsible. RIP packets received tell the device about
other networks and routers. The default is 60 seconds.
SAP Update Timer
This value dictates how often the device sends out IPX SAP (Service Access
Protocol) packets on the WAN link attached to this interface. The SAP
packets sent out on this interface contain information about services (such as
servers, printers, etc.) for which this device is responsible. SAP packets
received tell this device about services available on other network segments.
The default is 60 seconds.
Optional Remote Node Network Number
Besides defining a method for router-to-router communication, the PPP
protocol defines a method for individual client machines to dial in to a router
interface. Once a client machine has connected to a router interface in this
fashion, the router provides proxy services which allow the client machine to
participate as a node on one of the router’s local networks.
If remote node operation is desired, the WAN interface would usually be set
up as an unnumbered interface, and the Remote Node Network Number
would then be set to an IPX network number from the router’s Ethernet
interface(s).
Alternatively, if the interface is set to be numbered, an unused IPX network
number may be used.