
Configuring WAN Line Services
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Enabling or Disabling Burst Count
The Burst Count parameter provides performance tuning. Enable sets single-word
DMA burst cycles; Disable sets eight-word burst cycles. You should keep the
Burst Count parameter set to Enable. Disable the Burst Count parameter when
excessive TxUflo or RxOflo errors occur on the Ethernet ports of the following:
• DSDE (5430 - Dual Synchronous, Dual Ethernet) link module
• DSE (5420 - Dual Synchronous, Single Ethernet) link module
Disable this parameter on the synchronous interface that is either running at a
lower clock speed or carrying lower-priority traffic. If disabling Burst Count on
only one DSDE interface does not eliminate errors on both Ethernet interfaces,
then disable the Burst Count parameter on both interfaces.
Using the BCC
To enable or disable burst count, navigate to the serial prompt (for example,
box
;
serial/2/1
) and type:
burst-count
variable
For example:
serial/2/1#
burst-count enabled
serial/2/1#
burst-count disabled
Using Site Manager
See the Burst Count parameter on page A-74 for information.
Specifying the Link-Level Protocol
The Service parameter specifies the link-level protocol for this interface. You can
set the link-level protocol to one of the following:
• Transparent
• LLC1
•LAPB
The synchronous interface is configured for LLC1 by default.
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