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XRemote Configuration Commands

XRemote Configuration Commands

XRemote is a protocol developed specifically to optimize support for the X Window System over a serial communications link. Its compression and decompression algorithms are designed to handle bit-mapped displays and windowing systems.

Use the commands in this chapter to configure XRemote on your router. For XRemote configuration information and examples, refer to the chapter "Configuring XRemote" in the Access Services Configuration Guide. For information about establishing XRemote connections, refer to the chapter "Making Connections to Network Devices" in the Access Services Configuration Guide.

show xremote

To display XRemote connections and monitor XRemote traffic through the router, use the show xremote EXEC command.

show xremote
Syntax Description

This command has no arguments or keywords.

Command Mode

EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

The show xremote command displays XRemote parameters applied to the entire system, as well as statistics that are pulled for all active XRemote connections.

Sample Display

The following is sample output from the show xremote command when XRemote is enabled and XRemote sessions are active:

orange# show xremote
XRemote server-wide parameters:
  Font buffersize:     72000              Font retries: 3
  Font memory errors:  0
TFTP font load statistics for host 172.16.1.111:
  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 172.16.1.55  [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 53 describes the significant fields shown in the display.


Table 53: Show XRemote Field Descriptions
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 172.16.1.111 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.

show xremote line

To list XRemote connections and monitor XRemote traffic, use the show xremote line EXEC command.

show xremote line number
Syntax Description
number A decimal value representing the number of virtual terminal lines about which to display information.
Command Mode

EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

Sample Display

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.

Router# 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 172.16.1.27  [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 172.16.1.27
    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 172.16.1.27
    Client state:       CS_ACTIVE         Byte order: MSBfirst
    Unread input:       0                 Unwritten output: 0
    Input buffer size:  1024              Output buffer size: 1024

See Table 53 in the show xremote command description earlier in this chapter for show xremote line output field descriptions.

xremote tftp buffersize

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
no xremote tftp buffersize

Syntax Description
buffersize (Optional) Buffer size in bytes. This is a decimal number in the range from 4096 to 70000 bytes.
Default

70000 bytes

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

When the X terminal requests that a font file be loaded, the Cisco IOS software must first load the font file into an internal buffer before passing it to the X terminal. The default value of 70000 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 router 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 70000 bytes.

This command applies to both TFTP and LAT font access.

Example

The following example sets the buffer size to 20000 bytes:

xremote tftp buffersize 20000

xremote tftp host

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 hostname
no xremote tftp host hostname

Syntax Description
hostname IP address or name of the host containing fonts.
Default

No TFTP font server is specified.

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

Each time a new host name is entered, the list in the Cisco IOS software is updated. Font servers are queried in the order of their definition when the X terminal requests a font.

Examples

The following example sets the host IBM-1 as an XRemote TFTP font server:

xremote tftp host IBM-1

The following example sets the host with IP address 10.0.0.7 as an XRemote TFTP font server:

xremote tftp host 10.0.0.7

xremote tftp retries

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 retries number, use the no form of this command.

xremote tftp retries retries
no xremote tftp retries

Syntax Description
retries (Optional) Number of retries. Acceptable values are decimal numbers in the range from 1 to 15.
Default

3 retries

Command Mode

Global configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

Under certain conditions, you might need to increase the number of retries, particularly if the font servers are known to be heavily loaded.

Example

The following example sets the font loader retries to 5:

xremote tftp retries 5

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