Installation guide
20
Enhancements
Release Y.11.15 Enhancements
Additional Restrictions
Some authentication servers prevent the usage of special symbols such as the backslash (\) and
quotes (“”). ProCurve allows the use of these symbols in configurable credentials, but using them
may limit access for some users who may use different client software. Please refer to the vendor’s
documentation for specific information about these restrictions.
■ Enhancement (PR_0000038122) — TELNET Negotiate About Window Size (NAWS)
Initiation.
Telnet Negotiate About Window Size (NAWS) Initiation
Overview
When a telnet connection is established with a switch, the switch always uses the default values of
80 columns by 24 lines for the window dimensions. The window can be resized by either dragging
the corner of the window, or by executing the terminal length <x> width <y> CLI command and then
configuring the telnet client with those dimensions. The new window dimensions are lost after that
telnet session ends.
When the telnet connection is established with an HP ProCurve switch, either the switch or the telnet
client needs to initiate the inquiry about the availability of NAWS. If NAWS is available, you can resize
the window by dragging the corner of the window to the desired size. The telnet software uses NAWS
to tell the switch what the new window dimensions are. If the switch supports the requested window
dimensions, it uses them for all future interactions. If the switch does not support those window
dimensions, it refuses them and the telnet client requests an alternate set of window dimensions. The
negotiation continues until the telnet client and the switch agree on the window dimensions.
Making Window Size Negotiation Available for a Telnet Session
The switch currently responds to a request from the remote telnet client to negotiate window size.
However, some telnet clients do not request to negotiate window size unless the switch’s telnet server
suggests that NAWS is available.
This update allows window size negotiation to occur with telnet clients that support NAWS but do
not try to use it unless it is suggested by the switch’s telnet server. The switch’s telnet server will
suggest to the telnet client that NAWS is available.