Avaya Configuring WAN Line Services Bedienungsanleitung PDF herunterladen (Seite 179)

Configuring FT1 Services

117345-B Rev. 00

8-19

Setting the MTU Size

The router uses the transmit/receive buffer size (MTU) to configure the largest

frame that the router can transmit or receive across this FT1 port. The router

discards frames larger than this value. The MTU is 1600 bytes by default. You can

change it to any size from 3 to 4608 bytes for the logical line.

See the MTU Size (bytes) parameter on page A-53

for information.

Enabling or Disabling Remote Loopback Detection

Setting the Remote Loopback Detection parameter enables or disables detection

of the driver’s BofL packets on this logical line, as long as the

BofL Enable/Disable parameter is enabled for this interface. If you select Enable

to put the line in loopback detection mode, the driver will bring down the interface

when it detects its BofL packets.

You can disable or reenable remote loopback detection on this interface.

See the Remote Loopback Detection parameter on page A-53

for information.

Configuring BERT Diagnostic Pattern Tests

FT1 link modules support the bit error rate test (BERT) on individual logical lines.

In BERT mode, the router introduces deliberate error patterns into the transmitted

bit stream on a single logical line. It can generate patterns such as all ones, all

zeros, or a quasi-random signal sequence (QRSS) pattern.

To configure BERT diagnostics:

Enable BERT mode on the FT1 logical line.

See the BERT Mode parameter on page A-53

for information.

With BERT mode enabled, specify the bit pattern transmitted during

BERT diagnostics. Valid BERT test pattern options are as follows:

• Zero

• Ones

• QRSS

• 2e15

• 2e15 Inverted

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Avaya Configuring WAN Line Services Bedienungsanleitung Seite 179