Specifications

Configure a Synchronous Serial Interface

IC-70

Cisco IOS Interface Configuration Guide

Disable Fair Queueing

Disabling fair queuing will dramatically improve fast switching rates over the HSSI. To disable fair

queueing, use the following command in interface conﬁguration mode:

Conﬁgure a Synchronous Serial Interface

Synchronous serial interfaces are supported on various serial network interface cards or systems.

These interfaces support full-duplex operation at T1 (1.544 Mbps) and E1 (2.048 Mbps) speeds.

Refer to the Cisco Product Catalog for speciﬁc information regarding platform and

hardware compatibility.

Synchronous Serial Conﬁguration Task List

Perform the tasks in the following sections to conﬁgure a synchronous serial interface. The ﬁrst task

is required; the remaining tasks are optional.

• Specify a Synchronous Serial Interface

• Specify Synchronous Serial Encapsulation

• Conﬁgure a JT2 6.3-MHz Serial Port Adapter

• Conﬁgure PPP

• Conﬁgure Half-Duplex and Bisync for Synchronous Serial Port Adapters on Cisco 7200 Series

Routers

• Conﬁgure Compression Service Adapters on Cisco 7500 Series Routers

• Conﬁgure Compression of HDLC Data

• Conﬁgure Real-Time Transport Protocol Header Compression

• Conﬁgure the CRC

• Use the NRZI Line-Coding Format

• Enable the Internal Clock

• Invert the Data

• Invert the Transmit Clock Signal

• Set Transmit Delay

• Conﬁgure DTR Signal Pulsing

• Ignore DCD and Monitor DSR as Line Up/Down Indicator

• Specify the Serial Network Interface Module Timing

• Specify G.703 and E1-G.703/G.704 Interface Options

See the “Serial Interface Conﬁguration Examples” section at the end of this chapter for examples of

conﬁguration tasks described in this chapter.

Command Purpose

no fair-queue Disable fair queueing.