|
|
The feature provides inbound and outbound performance enhancements to America Online (AOL) users of wholesale dialing services. This feature is first introduced in Cisco IOS Release 12.1(1)AA.
Both aspects of the TCP Clear Performance Enhancements feature are enabled using the autocommand-options telnet-faststream command.
This feature is designed to provide more efficiency in the data transfers for AOL users who are using a Cisco network access server to communicate with a wholesale dial carrier.
The Cisco AS5800 access server is required to support all dial-in lines supported by two complete T3 connections (that is, 1344 connections) running TCP clear connections to an internal host. The desired average data throughput for these connections is 6 kbps outbound and 3 kbps inbound.
This feature allows the Cisco AS5800 platform to support the maximum number of connections provided by two T3 connections (that is, 1344 connections) running the TCP Clear protocol with typical traffic loads.
This feature has the following restrictions:
Special character processing---No special character processing, including break recognition, is performed on incoming data from the dial shelf. This requires the TCP clear connection to run as the sole connection on the TTY line. And this sole connection is terminated by TTY line termination or TCP connection termination, with no exec session capability for the user. This has been implemented by specifying a new autocommand-options option "telnet-faststream" which in conjunction with an autocommand of "telnet /stream" enables the fast-stream processing. This will also be available for TACACS/RADIUS av-pair processing since this uses the autocommand facility.
 |
Note The new autocommand-options telnet-faststream command is available only on the Cisco AS5800. See the "Command Reference" section. |
Cisco AS5800
Standards
No new standards or MIBs are supported by this feature.
MIBs
Standard Cisco AS5800 MIBs
For descriptions of supported MIBs and how to use MIBs, see the Cisco MIB web site on CCO at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.
RFCs
No new standards or MIBs are supported by this feature.
See the following sections for the configuration tasks for the TCP Clear Performance Enhancements feature:
Three options for configuring the autocommand telnet /stream command are as follows:
| Command | Purpose | |
|---|---|---|
Step 1 | Router(config)#line 1/3/00 1/11/143 | Selects the lines to be configured. |
Step2 | Router(config-line)#autocommand telnet aol-host 5190 /stream | Configures autocommand on the lines. |
| Command | Purpose | |
|---|---|---|
Step1 | Router(config)#username aol password aol | Defines the user ID and password. |
Step2 | Router(config)#username aol autocommand telnet aol-host 5190 /stream | Configures autocommand on the user ID. |
To enable the TCP Clear performance enhancements, autocommand-options must be configured to enable "telnet-faststream."
| Command | Purpose | |
|---|---|---|
Step1 | Router(config)#line 1/3/00 1/11/143 | Selects the lines to be configured. |
Step2 | Router(config-line)# autocommand telnet-faststream | Enables the TCP Clear performance enhancements on the selected lines. |
Use the show line command to see that the feature is correct in the configuration.
router#sh line 1/4/00
Tty Typ Tx/Rx A Modem Roty AccO AccI Uses Noise Overruns Int
* 1/4/00 Digital modem - inout - - - 1 0 0/0 -
Line 1/4/00, Location: "", Type: ""
Length: 24 lines, Width: 80 columns
Status: PSI Enabled, Ready, Connected, Active, No Exit Banner
Modem Detected
Capabilities: Hardware Flowcontrol In, Hardware Flowcontrol Out
Modem Callout, Modem RI is CD, Line usable as async interface
Hangup on Last Close, Modem Autoconfigure, Telnet Faststream
Modem state: Ready
Modem hardware state: CTS DSR DTR RTS
modem=1/4/00, vdev_state(0x00000000)=CSM_OC_STATE, bchan_num=(T1 1/2/0:7:20)
vdev_status(0x00000001): VDEV_STATUS_ACTIVE_CALL.
Group codes: 0, Modem Configured
Special Chars: Escape Hold Stop Start Disconnect Activation
^^x none - - none
Timeouts: Idle EXEC Idle Session Modem Answer Session Dispatch
never never none not set
Idle Session Disconnect Warning
never
Login-sequence User Response
00:00:30
Autoselect Initial Wait
not set
Modem type is 9600.
Session limit is not set.
Time since activation: never
Editing is enabled.
History is enabled, history size is 10.
DNS resolution in show commands is enabled
Full user help is disabled
Allowed transports are telnet. Preferred is lat.
Automatically execute command "telnet 1.100.254.254 2145 /stream"
No output characters are padded
No special data dispatching characters
router#
|
NoteNotice that Telnet Faststream is enabled under the Capabilities. |
This section documents new or modified commands. All other commands used with this feature are documented in the Cisco IOS Release 12.1 command reference publications.
To provide inbound and outbound TCP Clear performance enhancements, use the autocommand-options telnet-faststream line configuration command. To disable these enhancements, use the no form of this command.
autocommand-options telnet-faststream
Syntax Description
telnet-faststream This autocommand option enables the TCP Clear Performance Enhancements feature on the selected lines. This is relevant only if the Telnet /stream autocommand is selected for the line.
Defaults
No default behavior or values.
Command Modes
Line configuration command
Command History
12.1(1)AA This autocommand-options parameter was introduced.
Release
Modification
Usage Guidelines
The autocommand-options telnet-faststream option is relevant only if the Telnet /stream autocommand is selected for the line.
Examples
The following example shows the autocommand-options command using the new telnet-faststream keyword:
Router(config)#line 1/3/00 1/11/143 Router(config-line)#autocommand telnet aol-host 5190 /stream Router(config-line)#autocommand-options telnet-faststream
Posted: Mon Jun 5 16:41:09 PDT 2000
Copyright 1989 - 2000©Cisco Systems Inc.