Compatible Systems 5.4 manual RIP Update Timer

66 Chapter 3 - IPX Routing & Bridging

The IPX RIP protocol periodically sends out update information across a link. These periodic update packets will cause a VPN link 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 link 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 network segments 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 network segments 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.

Block IPX Type 20 Output Packets

In order for some protocols, notably NetBIOS, to function in the NetWare environment, devices must propagate a certain type of broadcast packet throughout an IPX internetwork. IPX packet type 20 is designated to perform broadcast propagation for these protocols.

When an IPX device receives a type 20 packet, it rebroadcasts it out all inter- faces, except the one on which it was received. The IPX network number of the originating interface is included in the rebroadcast packets.

This checkbox allows you to control the rebroadcasting of IPX type 20 packets on this interface. This is useful for on-demand links where the link may be brought up as a result of propagating this type of packet.

•If checked, then type 20 packets will not be propagated on this interface. The default is unchecked.