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The X Window System, also called X, is a network-based graphics window system originally developed for workstations running UNIX. Cisco Systems developed an XRemote application that allows the XRemote capabilities of X terminals to run on the router. Information in this chapter will help you understand the X Windows system and how to configure your protocol translator to support XRemote connections.
For XRemote configuration information and examples, refer to the chapter "Configuring XRemote" earlier in this publication. For information about establishing XRemote connections, refer to the Remote Access Server Connection Guide.
To display XRemote connections and monitor XRemote traffic through the protocol translator, use the show xremote EXEC command.
show xremoteThis command has no arguments or keywords.
EXEC
The show xremote command displays XRemote parameters applied to the entire system, as well as statistics that are pulled for all active XRemote connections.
The following is sample output from the show xremote command when XRemote is enabled on a protocol translator and XRemote sessions are active:
pt# show xremote
XRemote server-wide parameters:
Font buffersize: 72000 Font retries: 3
Font memory errors: 0
TFTP font load statistics for host 131.108.1.111:
Bytes read: 2697239 Files read: 258
Network errors: 4 File errors: 0
LAT font load statistics for service WHEEL, incarnation 5:
Bytes read 182401 Files read: 14
Protocol errors: 0 Insufficient memory: 0
XRemote statistics for tty2:
Current clients: 9 Total clients: 17
Requesting client: 5 Current request size: 0
Replying client: 6 Current reply size: 0
XDM state: 10 Next timeout: 172460
Retransmit counter: 0 Local UDP port: 53616
Keepalive dormancy: 180 Session id: 94
Unread input: 0 Unwritten output: 0
Input buffer size: 1024 Output buffer size: 108
Protocol version: 2 Line state: Connected
Transmit packets: 50768 Receive packets: 49444
Transmit errors: 0 Receive errors: 37
Retransmissions: 403 Receive out of sequence: 76
Round trip time: 383 Retransmit interval: 766
Transmit window: 7 Receive window: 7
Transmit next: 6 Receive next: 3
Transmit unacked: 6 Receive unacked: 0
Connection 0 - TCP connection from 131.108.1.55 [Display Manager]
Client state: CS_ACTIVE Byte order: MSBfirst
Unread input: 0 Unwritten output: 0
Input buffer size: 1024 Output buffer size: 1024
Connection 1 - LAT connection from WHEEL
Client state: CS_ACTIVE Byte order: LSBfirst
Unread input: 0 Unwritten output: 0
Input buffer size: 1024 Output buffer size: 1024
Table 8-1 describes the significant fields shown in the display.
| Field | Description |
|---|---|
| XRemote server-wide parameters | This section displays XRemote parameters that apply to the protocol translator. |
| Font buffersize | XRemote font buffer size that was specified with the xremote tftp buffersize global configuration command. |
| Font retries | Number of retries the font loader (host) will attempt before declaring an error condition. |
| Font memory errors | Number of font memory error conditions that have been declared for the protocol translator. |
| TFTP font load statistics for host 131.108.1.111 | This section displays XRemote statistics for fonts that have been loaded from a TFTP font server at the IP address shown. |
| Bytes read | Number of bytes the host read in order to load the fonts. |
| Files read | Number of files the host read in order to load the fonts. |
| XRemote statistics for tty2 | This section displays XRemote for the specified line. |
| Current clients | Number of clients using this line for active XRemote sessions. |
| Total clients | Includes the number of clients using this line for active XRemote sessions. |
| Requesting client | Number of clients requesting XRemote service. |
| Retransmit counter | Number of times that XRemote connection requests were retransmitted. |
| Local UDP port | Number assigned to the local UDP port. |
| Keepalive dormancy | Amount of time between keepalive messages. |
To list XRemote connections and monitor XRemote traffic, use the show xremote line EXEC command.
show xremote line number| number | A decimal value representing the number of virtual terminal lines about which to display information. |
EXEC
The following is sample output from the show xremote line command (line 3 is specified) when XRemote is enabled and XRemote sessions are active. Only information specific to an individual terminal line is provided.
pt# show xremote line 3
Xremote statistics for tty3:
Current clients: 11 Total clients: 19
Requesting client: 10 Current request size: 0
Replying client: 10 Current reply size: 0
XDM state: 10 Next timeout: 173304
Retransmit counter: 0 Local UDP port: 28384
Keepalive dormancy: 180 Session id: 29
Unread input: 0 Unwritten output: 0
Input buffer size: 1024 Output buffer size: 108
Protocol version: 2 Line state: Connected
Transmit packets: 28875 Receive packets: 18644
Transmit errors: 0 Receive errors: 13
Retransmissions: 53 Receive out of sequence: 41
Round trip time: 384 Retransmit interval: 768
Transmit window: 7 Receive window: 7
Transmit next: 2 Receive next: 7
Transmit unacked: 2 Receive unacked: 0
Connection 0 - TCP connection from 131.108.1.27 [Display Manager]
Client state: CS_ACTIVE Byte order: MSBfirst
Unread input: 0 Unwritten output: 0
Input buffer size: 1024 Output buffer size: 1024
Connection 1 - TCP connection from 131.108.1.27
Client state: CS_ACTIVE Byte order: MSBfirst
Unread input: 0 Unwritten output: 0
Input buffer size: 1024 Output buffer size: 1024
Connection 2 - TCP connection from 131.108.1.27
Client state: CS_ACTIVE Byte order: MSBfirst
Unread input: 0 Unwritten output: 0
Input buffer size: 1024 Output buffer size: 1024
Table 8-1 earlier in this chapter describes the fields shown in the display.
To change the buffer size used for loading font files, use the xremote tftp buffersize global configuration command. To restore the buffer size to the default value, use the no form of this command.
xremote tftp buffersize [buffersize]| buffer-size | (Optional) Buffer size in bytes. This is decimal number in the range is 4096 to 70,000 bytes. |
70,000 bytes
Global configuration
When an X terminal requests that a font file be loaded, the protocol translator first must load the font file into an internal buffer before passing it to the X terminal. The default value of 70,000 bytes is adequate for most font files, but the size can be increased as necessary for nonstandard font files.
The buffer size can be set as low as 4096 bytes and as large as the available memory on the protocol translator will allow. If you are using LAT font access, you should not lower the buffer size below the default, because the font directory for all of the LAT fonts (created internally) requires 70,000 bytes.
This command applies to both TFTP and LAT font access.
The following example sets the buffer size to 20,000 bytes:
xremote tftp buffersize 20000
To add a specific TFTP font server as a source of fonts for the terminal, use the xremote tftp host global configuration command. To remove a font server from the list, use the no form of this command.
xremote tftp host [host-name]| host-name | (Optional) Name of the host containing fonts |
No TFTP font server specified.
Global configuration
Each time a new host name is entered, the list on the protocol translator is updated. Font servers are queried in the order of their definition when the X terminal requests a font.
The following example sets the host name to IBM-1:
xremote tftp host IBM-1
To specify the number of retries the font loader will attempt before declaring an error condition, use the xremote tftp retries global configuration command. To restore the default number the retries, use the no form of this command.
xremote tftp retries [retries]| retries | (Optional) Number of retries. This is a decimal number in the range 1 to 15. |
3 retries
Global configuration
Under certain conditions, you might need to increase the number of retries, particularly if the font servers are known to be heavily loaded.
The following example sets the font loader retries to 5:
xremote tftp retries 5
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