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This chapter describes the commands you use to configure Combinet Packet Protocol (CPP) parameters and Point-to-Point Protocol (PPP) parameters, such as call negotiation and authentication.
To enable or disable data compression, use the set compression command.
Syntax Description
| stac | Enables data compression. |
| off | Disables data compression. If you are using High Level Data Link Control (HDLC) protocol, set compression to off. |
Default
stac (enabled)
Command Mode
Profile mode
Example
The following example disables compression for the profile 2503 connection:
Host:2503> set compression off
To configure the action taken if the negotiation process between the Cisco router and the remote router fails, use the set cpp negotiation abort command.
Syntax Description
| disconnect | If negotiation with the remote router fails, the Cisco router will disconnect the call. |
| preset | If negotiation with the remote router fails, the Cisco router will remain connected. |
Default
disconnect
Command Mode
System level
Example
The following example configures the router to remain connected if negotiation with the remote router fails:
Host> set negotiation abort preset
set cpp or ppp negotiation count
To configure the number of times that the Cisco router will attempt a successful negotiation, use the set cpp or ppp negotiation count command.
Syntax Description
| attempts | Number of times the router will attempt a successful negotiation. Must be a number between 1 and 100. |
Default
16 attempts for CPP
10 attempts for PPP
Command Mode
System level
Example
The following example configures the router to attempt negotiation 20 times:
Host> set ppp negotiation count 20
set cpp or ppp negotiation integrity
To configure the period of time between line integrity packets, use the set cpp or ppp negotiation integrity command.
Syntax Description
| seconds | The period of time between line integrity packets, in seconds. Must be between 1 and 60 seconds. If the router does not receive a line Integrity packet for three consecutive periods, the ISDN line disconnects. |
| off | Disables link integrity packets. |
Default
10 seconds
Command Mode
System level
Example
The following example sets the period of time between line integrity packets to 5 seconds.
Host> set cpp negotiation integrity 5
set cpp or ppp negotiation retry
To configure the amount of time (retry interval) between negotiation attempts, use the set cpp or ppp negotiation retry command.
Syntax Description
| milliseconds | Amount of time (in milliseconds) between negotiation attempts. Must be between 200 and 6000 milliseconds. |
Default
1000 milliseconds for CPP
3000 milliseconds for PPP
Command Mode
System level
Example
The following examples configure the router to attempt negotiation every 5 seconds:
Host> set negotiation retry 5000 for cpp Host> set ppp negotiation retry 5000 for ppp
To configure the way that PPP links are aggregated, use the set ppp multilink command.
Syntax Description
| on | Sets the router to negotiate the PPP multilink protocol. This protocol allows data to be sent over multiple channels. |
| off | Disables the router from requesting PPP multilink negotiation. If the remote router requests PPP multilink, the router will accept it, regardless of this setting. |
Default
on (enabled)
Command Mode
System level
Example
The following example configures the router to not initiate negotiation of PPP multilink:
Host> set ppp multilink off
To configure the number of times the router will send a terminate request packet without an answer before disconnecting the ISDN line, use the set ppp terminate count command.
Syntax Description
| attempt | Number of times the router will send a terminate request packet without an answer before disconnecting the ISDN line. Must be between 1 and 100. |
Default
2 tries
Command Mode
System level
Example
The following example configures the router to send terminate request packets five times before disconnecting the ISDN line:
Host> set ppp termreq count 5
To configure how Ethernet packets are sent over the ISDN line, when using CPP, use the set protocol command.
Syntax Description
| hdlc | Packets are encapsulated in standard High Level Data Link Control (HDLC). This protocol cannot be used when data compression is enabled with the set compression command. |
| ordered | Packets are arranged in the order they are received. |
| fragmented | Packets are fragmented before being sent over both ISDN B channels simultaneously. The remote router reassembles the fragments and sends them onto the remote LAN. |
Default
ordered
Command Mode
Profile mode
Example
The following example configures profile 2503 for packet fragmentation:
Host:2503> set protocol fragment
Related Command
set compression
To display all negotiation parameters, use the show negotiation command.
Syntax Description
| all | (Optional) Use this keyword in profile mode to display system negotiation parameters and also profile negotiation parameters. |
Command Mode
System level or profile mode
Usage Guidelines
In profile mode, this command displays only parameters that can be configured by the profile. Values are inherited from the profile template. Values that have been redefined from the template value are indicated with an asterisk.
At the system level this command displays all system parameters.
Sample Display
The following sample display shows output from the show negotiation command at the system level:
2865_66> sh negotiation
System Parameters
CPP Negotiation Parameters
Integrity Interval 10
Negotiation Abort DISCONNECT
Retry Count 6
Retry Interval 1000
PPP Negotiation Parameters
Integrity Interval 10
Retry Count 10
Retry Interval 3000
Terminate Count 2
Multilink ON
Profile Parameters
Generic Negotiation Parameters
Compression STAC
CPP Negotiation Parameters
Protocol ORDERED
Negotiated Parameters
Connection 1 Virtual
Connection 2 Virtual
Connection 3 Virtual
Connection 4 Virtual
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