Avaya Configuring WAN Line Services Uživatelský manuál Strana 39

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Configuring Synchronous Services
117021-A Rev. A 2-5
We recommend that you enable BofL for point-to-point connections between Bay
Networks peers. However, if such a connection is accomplished through a wide
area transport service such as Frame Relay, X.25, or SMDS, you must disable
BofL.
The router enables BofL messages by default. Disable or enable BofL messages
on the interface.
Setting the BofL Timeout
The BofL Timeout parameter specifies the time between transmissions of BofL
messages from this synchronous interface. This parameter is valid only when
BofL is enabled.
By default, the BofL timeout period is 5 seconds. Timeout will occur if five
periods elapse without both a successful frame transmission and a successful
reception. When timeout occurs, the router disables and reenables the
synchronous line. For example, with this parameter set to 5 seconds, the interface
must successfully transmit and receive a frame within 25 seconds. Timeout occurs
in 25 seconds.
Set the BofL timeout to a value from 1 to 60 seconds on the interface.
Setting the MTU
The maximum transmission unit (MTU) is the largest frame that the router can
transmit on this line.
For X.25, use a value at least 5 bytes more than the maximum packet size for the
packet level.
The MTU is 1600 bytes by default. Set the MTU from 3 to 4608 bytes on the
interface.
Site Manager: BofL parameter: page A-41
Site Manager: BofL Timeout parameter: page A-42
Site Manager: MTU parameter: page A-42
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