Release Notes

The "Character Send Threshold" value specifies the number of
characters per SOL data packet. As soon as the number of characters
accepted by the BMC is determined to be equal or greater
than the "Character Send Threshold" value, the BMC starts
transmitting SOL data packets. Each SOL data packet contains
number of characters equal to or less than the "Character Send
Threshold" value. If a packet contains fewer characters
than this value, it is defined to be a partial SOL data packet.
The "Character Accumulate Interval" value is the amount of time the
BMC waits before sending a partial SOL data packet. This parameter
is specified in milliseconds.
You can set these two parameters in Server Administrator by
clicking "Advanced Settings" on the "Serial-Over-LAN" page for
the BMC object.
If you change these values to lower values, the console redirection
feature of SOL Proxy may experience reduced performance. For
example, if the "Character Send Threshold" value is reduced to 10
characters, only 10 characters are being redirected each time a
packet is sent. Also, SOL Proxy has to wait to receive an
acknowledgement for each packet before sending the next packet. As
a result, the performance is significantly reduced.
* The intended usage model for the SOL Proxy is the following:
Telnet Client <---> WAN Connection <---> SOL Proxy <---> BMC Server
When the SOL Proxy communicates with the telnet client on a
management station, it uses the TCP/IP protocol. However, SOL Proxy
communicates with the managed system's BMC over the RMCP/IPMI/SOL
protocol, which is a UDP-based protocol. Therefore, if you
communicate with your managed system's BMC from SOL Proxy over a
WAN connection, you may experience network performance issues such
as connection timeouts.
It was noted in a test environment that while performing console
redirection over a WAN simulator, where the WAN connection was
between the SOL Proxy and BMC, a 10 percent packet loss rate led to
several network errors, such as connection time-outs and
authentication errors. However, when the packet loss rate was
reduced to 5 percent, the SOL Proxy did not experience any network
issues.
However, the recommended usage model is to have the SOL Proxy and
the BMC Server on the same LAN. The management station with the
telnet client can then connect to the SOL Proxy over a WAN
connection. SOL Proxy will function as desired in this usage model.
* When you initiate a console redirection session using SOL Proxy,
while loading the Microsoft Windows operating system, you may
not be able to send data to the serial port. As Windows can block
data writing to the serial port, you might receive the following
message when you attempt to send data using keyboard input: