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Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
OL-1957-04
Chapter3 Configuring with the Command-Line Interface
Configuring the 1-Port HSSI Network Module
To invoke ATM over a serial line, perform the following tasks in interface configuration mode:
Convert HSSI to Clock Master
You can convert the HSSI interface into a 45-MHz clock master by performing the following task in
interface configuration mode:
Disable Fair Queueing
Disabling fair queuing will dramatically improve fast switching rates over the HSSI. To disable fair
queueing, perform the following task in interface configuration mode:
For more information about configuring HSSI interfaces, refer to the “Configuring Serial Interfaces”
chapter in the Cisco IOS Release 11.3 Configuration Fundamentals Configuration Guide.
Configuration Examples
The following example shows how to configure a 1-port HSSI network module on a Cisco 3600 series
router. Both sides of the network connection need to be configured:
interface hssi 0/0
ip address 10.1.1.1 255.255.255.0
hssi internal-clock
no fair-queue
no shutdown
interface hssi 1/0
ip address 10.1.1.2 255.255.255.0
hssi internal-clock
no fair-queue
no shutdown
In this example:
• The interface hssi command specifies a HSSI interface and changes the configuration mode from
global to interface.
• The ip address command assigns an IP address to this interface.
• The hssi internal-clock command sets the HSSI clock source.
Task Command
Specify the encapsulation method.
encapsulation atm-dxi
Map a given VPI and VCI to a DXI frame
address.
dxi map protocol address vpi vci
[broadcast]
Task Command
Convert the HSSI interface into a
51.84-MHz clock master.
hssi internal-clock
Task Command
Disable fair queueing.
no fair-queue
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