Long_Break; Loose_Source_Route - Nortel 2000 Software Reference Manual

Chapter 2 Configuration Parameters
Remote Annex Administrator's Guide for UNIX
Book C-72
long _ break
This asynchronous port parameter enables an Annex to return a user to
the CLI prompt after receiving a break signal of more than two seconds.
When disabled, the Annex passes the break to the local application. A Y
enables this parameter, an N disables it. The default is Y.

loose_source_route

This Annex parameter controls the Loose Source Routing protocol which
defines a sequence of IP addresses that a datagram must follow. A Y
enables this parameter, an N disables it. The default is Y.
When enabled, The Annex forwards all IP packets that have the Loose
Source Routing and Record option set. The Annex forwards all IP packets
that have the Strict Source Routing and Record option set only if the next
routing address is directly reachable by the Annex. Otherwise, the Annex
drops these packets and sends an ICMP type Destination Unreachable
message with a code of Source Route Failed.
When disabled, the Annex will not forward any IP packets that have the
Strict Source Routing and Record or Loose Source Routing and Record
options set. The Annex accepts these packets only if the Annex itself is
the ultimate destination. If the packets are not addressed to the Annex,
they are dropped and the Annex sends an ICMP type Destination
Unreachable message with a code of Source Route Failed will to the
originator.
Loose source routing can pose a security risk if you use filters on your
network router. If you are concerned with security, set this parameter
to N.
Book C