Echo EN55022 manual Events, Novell Keep-Alives, Menu Selection, Description

MENU SELECTION	DESCRIPTION
NETWORK	Source or destination IPX number
	(eight digit hexadecimal.)
MAC NODE ADR	Ethernet MAC address of the network
	adapter	card	(twelve	digit
	hexadecimal.		File servers	are
	usually designated 000000000001.
SOCKET	Designates a conversation between
	two addresses.
P.T	An 8-bit field that specifies the upper-
	layer protocol to receive the packet's
	information e.g. NCP or SPX.
RSLT	The action to be taken as a result of
	IPX packets meeting filter conditions
	e.g. FAIL (drop) or PASS (route.)

4.7.5 NOVELL KEEP-ALIVES

Novell File Servers poll all workstations that are attached to the server if they have not seen any traffic from that station for a certain period. This is to detect situations where the workstation has been turned off without being logged out. If these Poll Inactive Station packets or the reply are filtered out, then any workstation that is unused for approximately 15 minutes will lose the network connection.

The request from the server is from source socket 4001 to destination socket 4004 with a Packet Type of zero. The reply from the workstation is from source socket 4004 to destination socket 4001.

If you do not make provision for these packets in the IPX header filter table then any workstations unused for approximately 15 minutes will lose their network connection.

4.8EVENTS

Echo LANlink Router Option User Manual Issue 1.0 04 December 1997 Page 41 of 59