Verilink WANsuite 6450, Справочное руководство

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3-36 W A N s u i t e 6 4 5 0
Status
Reassembly Cells Displays the number of cells received by the CES IWF. This number excludes
cells that have been discarded for any reason, including cells not used due to
their being misinserted or discarded while the reassembler was awaiting
synchronization.
Header Errors Displays the number of AAL1 header errors detected, including those that
have been corrected. Header errors include correctable and uncorrectable
CRCs and bad parity.
Pointer Reframes Displays the number of events in which the AAL1 reassembler found a
Structured Data Pointer (SDT pointer) where it was not expected, making it
necessary to reacquire the pointer.
Pointer Parity Errors Displays the number of events in which the AAL1 reassembler has detected
an SDT pointer parity check failure.
AAL1 Seq Errors Displays the number of times the sequence number of an incoming AAL1
frame causes a transition from the “sync” state to the “out of sequence” state.
Lost Cells Displays the number of cells detected as lost in the network prior to reaching
the destination CES IWF AAL1 layer processing. As an example, the number
of lost cells may be detected as a result of AAL1 sequence number
processing.
Misinserted Cells Displays the number of AAL1 sequence violations, which the AAL
Convergence Sublayer interprets as “misinserted cells.”
Buffer Underflows Displays the number of times the CES reassembly buffer underflows.
Buffer Overflows Displays the number of times the CES reassembly buffer overflows.
Cell Loss Status Displays “Loss” when cells are continuously lost during the specified Cell
Loss Integration Period. When a valid cell(s) is received, this condition is
cleared, and “No Loss” will be displayed.
Configuring the WANsuite 6450 for CES involves setting parameters not only
on the CES Service Details screen (Figure 3.32 on page 3-34), but also on the
CBR screen (Figure 3.13 on page 3-14); in some cases, the Serial screen
(Figure 3.17 on page 3-19); and the Channel Table Details screen (Figure 3.33
on page 3-37). The table below shows the settings required to maintain the
proper relationships among CBR framing, the CES Service Type, the CES
AAL1 format, and the Channel Rate.
CES Service
Description
CBR
Framing
CES Service
Type
CES
AAL1
Format
Channel
Rate
Basic E1 E1 CCS Structured Basic 64 k
Basic T1 (ESF) T1 ESF Structured Basic 64 k