ADTRAN 1200070L1 - Manual (Page 87)

Chapter 3: Terminal Menu Operation and Structure
61200.070L1-1 Express XL/XLT User Manual 71
IPX/Retain
Write security: 3; Read security: 5
When this Connection List entry is disconnected and this parameter is set to
Yes
, all routes learned from this WAN connection are retained and their rout-
ing interface is set to idle. This permits dial-on-demand to occur using this
profile for any IPX network or service that might have been advertised by the
particular PPP peer. The idle routes can be flushed or “zombied” from the
routing table if a manual hangup is performed when this WAN connection is
not active. See Dial /Hang up. When this Connection List entry is disconnect-
ed and this parameter is set to No (def), IPX routes and services learned from
this session are “zombied” and are not retained.
IPX/Type 20 Packets
Write security: 3; Read security: 5
In order for certain protocol implementations, like NetBIOS, to function in the
NetWare environment, routes must allow a broadcast packet to be propagated
throughout the IPX networks. The Type 20 IPX packet is used specifically for
this purpose. This causes special handling of this packet by the Express XL/
XLT. When a router receives this type of packet, it rebroadcasts it across all
interfaces except the one it is received on and includes the network number of
that interface in the data portion of the packet. The IPX Router Specification
from Novell notes that Type 20 packets should not be propagated across slow-
er links with bandwidths of less than 1Mbps (like ISDN). However, when set
to Pass (def), the Express XL/XLT will allow these packets to propagate over
the WAN connection. This facilitates dial-on-demand applications. When set
to Block, all Type 20 packets are not propagated across the WAN connection.