Cisco ISE - Line Card ISE Bedienungsanleitung PDF herunterladen (Seite 28)

Cisco IOS SoftwareConfiguration for theCisco 12000 SeriesOne-Port Channelized OC-12/STM-4(DS1/E1) ISE Line

How to Configure Layer 1 Features

Cisco IOS Release 12.0(27)S1

Using T1 Interface Loopback Modes

If you have difficulty with the 1-Port CHOC-12 ISE line card configuration or installation, you can

troubleshoot the problem using the tug-2 tug-2-number t1 t1-line-number loopback [local | network

{line | payload} | remote {line fdl {ansi | bellcore} | payload [fdl] [ansi]}] AU-3 configuration

command. In c-11 mode, t1-line-number is a number in the range from 1 to 4. Table 7 describes the

supported loopback modes within the syntax of this command.

Note fdl loopback commands are available only for T1 links configured for ESF framing.

Table 7 provides explanations of specific T1 loopback modes.

Table 7 T1 Interface Loopback Modes under SDH Framing with AU-3 AUG Mapping

local Optional. Loops the router output data back toward the router at

the T1 framer.

network {line | payload} Optional. Selecting network line loops the data back toward the

network before the T1 framer.

Selecting network payload sets a loopback that works much

like the network line loopback, except that the T1 framing bits

are stripped at the receive side of the T1 framer and regenerated

at the transmit side of the T1 framer (toward the network).

If the T1 channel is configured for internal clocking and you

attempt to set a network payload loopback, you will receive the

following warning message:

This channel is configured for Internal clocking. Data

integrity in network payload loopback is guaranteed

only if the opposite end is configured for Line

clocking, or vice versa.

Either the local port should be internal, and the remote port

line, or the local port should be line, and the remote port

internal.

remote line fdl {ansi | bellcore} Optional. Sends a repeating, 16-bit ESF data link code word

(00001110 11111111 for ANSI; 00010010 11111111 for

Bellcore) to the remote end, requesting that it enter into a

network line loopback.

Specify the ansi keyword to enable the remote line facility data

link (FDL) ANSI bit loopback on the T1 channel, per the

ANSI T1.403 specification.

Specify the bellcore keyword to enable the remote SmartJack

loopback on the T1 channel, per the TR-TSY-000312

specification.

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Cisco ISE - Line Card ISE Bedienungsanleitung Seite 28