Operation Manual

136 NetWare MultiProtocol Router for ISDN 3.1 Installation and ISDN Configuration Guide
To reduce the NDS synchronization packets, two solutions are
provided:
One possibility is to use two NLMs (DSFILTER.NLM and
PINGFILT.NLM) delivered with the product. These filters must
be installed and configured on each NetWare 4 server in the
internetwork. For more information on how to configure and use
these filters, refer to the NetWare MultiProtocol Router 3.1 Release
Notes, pp. 51-55.
The second solution is to use the NW4/NDS Filter, which filters
Ping-for-NDS packets on the ISDN driver level to prevent them
from being sent over ISDN.
Default: Enabled
Options: Enabled, Disabled
When the NW4/NDS Filter is enabled, NCP requests type 104
packets are filtered and not sent over ISDN to each remote
NetWare 4 server in the NDS tree.
When you disable the NW4/NDS Filter, an ISDN connection is
set up to all remote LANs with NDS servers each time an NCP
request type 104 is issued.
28. Check the NW4/NDS Spoofing .
The NW4/NDS Spoofing acknowledges Ping-for-NDS packets
(NCP request type 104) locally and prevents them from being
sent over ISDN to all remote NetWare 4 servers in the NDS tree.
However, NDS synchronization is required in regular intervals.
This is why NDS Pass Through Times must be configured on the
NetWare MultiProtocol Router for ISDN 3.1 to allow initiation of
synch processes by Ping-for-NDS packets.
Default: Disabled
Options: Disabled, Enabled, Time Restricted
When NW4/NDS Spoofing is enabled, the NetWare MultiProto-
col Router for ISDN acknowledges Ping-for-NDS packets locally
and sends back error 663 (DS is locked).
To make sure that synchronization throughout the WAN is
effected in regular intervals, select Time Restricted and configure
NDS Pass Through Times and use the NDSSYNC.NLM. For