
Configuring Line Services
4-8
Parameter: Burst Count
Default: Enable
Options: Enable
| Disable
Function: Specifies single or multiple DMA burst cycles. If you set this parameter to
Enable, the chip performs eight-word bursts. If you set this parameter to
Disable, single-word burst cycles are performed.
This is a performance-tuning parameter. You should set it to Enable
except in certain cases with DSDE (5430 - Dual Sync, Dual Enet) and
DSE (5420 - Dual Sync, Single Enet) link modules. Set it to Disable if
excessive TxUflo or RxOflo errors occur on the Ethernet ports. If you
have configured both SYNC ports, disable this parameter first on the
SYNC interface that is either running at a lower clock speed or carries
lower-priority traffic.
You should only disable this parameter on both SYNC interfaces if those
interfaces are DSDE configurations and you configured both Ethernet
interfaces. In these configurations, disable this parameter on both SYNC
interfaces if disabling it on only one interface does not eliminate the
excessive TxUflo or RxOflo errors on the two Ethernet interfaces.
Instructions: Select Enable or Disable.
MIB Object ID: 1.3.6.1.4.1.18.3.4.5.1.17
Parameter: Service
Default: LLC1
Options: Transparent
| LLC1 | LAPB
Function: Specifies the link-level protocol for this circuit. If you set this parameter
to Transparent, then raw HDLC (high-level data link control) mode is in
effect. LLC1 specifies connectionless datagram service; it prefixes the
HDLC address and control fields to the frame.
Instructions: Set this parameter as appropriate for this circuit. If X.25 is enabled on this
line, you must set this parameter to LAPB.
MIB Object ID: 1.3.6.1.4.1.18.3.4.5.1.18
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