Avaya Configuring Ethernet, FDDI, and Token Ring Services Instrukcja Użytkownika Pobierz pdf (Strona 28)

Configuring Ethernet, FDDI, and Token Ring Services

2-4 117020-A Rev. A

Enabling or Disabling an Ethernet Interface

The router enables CSMA/CD services when you add a 10-Mb/s or 100-Mb/s

Ethernet circuit to the router conﬁguration ﬁle.

You can disable and enable the Ethernet interface without moving physical

cabling.

Conﬁguring BofL Messages

For carrier detection on Ethernet circuits, the router sends breath of life (BofL)

messages whenever the interface transmitter is idle. When there is no data trafﬁc,

BofL messages signify that the Ethernet LAN is up and functioning normally.

These sections describe how to conﬁgure BofL transmissions:

• Enabling or Disabling BofL Messages

• Setting the BofL Timeout

• Setting BofL Retries

• Setting the BofL Timeout Divisor

With default values conﬁgured, the router declares an Ethernet interface down

after 25 seconds (ﬁve retries of 5 seconds each) without a successful frame

transmission.

Site Manager: Enable parameter: page A-1

Note: When you conﬁgure router redundancy on an Ethernet interface, Site

Manager automatically adjusts BofL parameters to reduce the time it takes the

router to declare an interface down when there is a loss of service. With default

router redundancy values conﬁgured, the router declares the interface down

after 2 seconds (four retries of .05 seconds each).

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Avaya Configuring Ethernet, FDDI, and Token Ring Services Instrukcja Użytkownika Strona 28