Table of Contents

Syntax Description
Keywords
Examples
Related Commands

HSSI Interface

This section sets configuration parameters for the specified HSSI WAN interface. The HSSI interface has a data capacity of 44.736 Mbps (referred to as Data Speed 3 or DS3).

Syntax Description

WAN slot:port

Ports are numbered starting with 0, so for a module with one port, the port is 0. For theVPN 5008 chassis, slot 0 is the far left slot. For the VPN 5002 chassis, slot 0 is the top slot.

Keywords

After entering the configure command for the section, enter one or more of the following keywords.

Clocking = {Internal | External}

The Clocking keyword configures whether the interface will use its own internal clock or obtain the clock from the DCE to use for the interface's transmit signal towards the network. In Internal mode, an internal 33 Mb clock is used. Internal clocking should only be used when testing between two back-to-back HSSI ports connected via a NULL-modem cable. In External mode, the clock provided by the DCE (usually a CSU/DSU) is used. Always use external clocking when attached to a CSU/DSU. The default is External mode. Verify this setting with your ISP.

CRC = {16bit | 32bit}

The CRC keyword configures whether the DSU will use a 16-bit or 32-bit frame check sequence. Both ends of a DS3 connection must use the same CRC (Cyclical Redundancy Check) setting. The default is 16bit.

Examples

[ HSSI Interface Wan 0:0 ]
Clocking                 = External
CRC                      = 16bit

Related Commands

Command	Description
configure Link Config	Configures the interface parameters for a WAN port
set wan hssi	Sets HSSI port hardware parameters
show wan	Shows WAN port information

Posted: Wed Sep 27 10:38:15 PDT 2000
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