Avaya Configuring Ethernet, FDDI, and Token Ring Services Manual de usuario descargar pdf (Pagina 29)

Configuring Ethernet Services

117344-A Rev. A 2-5

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.

Enabling or Disabling BofL Messages

With BofL enabled, the router sends polling messages from this Ethernet interface

to all systems on the local network.

BofL messages are enabled by default on every Ethernet interface. You can

disable and enable BofL messages on an interface.

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).

Note: The router does not send BofL messages if it is already transmitting

regular data trafﬁc.

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Avaya Configuring Ethernet, FDDI, and Token Ring Services Manual de usuario Pagina 29