Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 54)

24 Multi-Service IronWare Switching Configuration Guide
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10G WAN PHY fault and performance management
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Severely Errored seconds (SES) At each layer, an Severely Errored Second (SES) is a second with x or more CVs
at that layer, or a second during which at least one or more incoming defects at
that layer has occurred. Values of x vary depending on the line rate and the Bit
Error Rate. SES can be identified as follows:
•
Section Severely Errored seconds (SES-S)·
•
Line Severely Errored seconds (SES-L), Line Errored seconds- Far end
(SES-LFE)·
•
Path Severely Errored seconds (SES-P), Path Errored seconds- Far end
(SES-PFE)
Severely errored frame seconds
(SEFS) A Severely Errored Framing Second (SEFS) is a seconds with containing one or
more SEF events. This counter is only counted at the Section Layer.
Unavailable seconds (UAS) At the Line, Path, and VT layers, an unavailable second is calculated by counting
the number of seconds that the interface is unavailable. At each layer, the
SONET or SDH interface is said to be unavailable at the onset of 10 contiguous
SESs. The 10 SESs are included in unavailable time. Once unavailable, the
SONET or SDH interface becomes available at the onset of 10 contiguous
seconds with no SESs. The 10 seconds with no SESs are excluded from
unavailable time. With respect to the SONET or SDH error counts at each layer,
all counters at that layer are incriminated while the SONET or SDH interface is
deemed available at that layer. While the interface is deemed unavailable at
that layer, the only count that is incriminated is UASs at that layer.
UAS can be identified as follows:
•
Line Unavailable seconds (UAS-L), Line Unavailable seconds at far end
(UAS-LFE)·
•
Path Unavailable seconds (UAS-P), Path Unavailable seconds (UAS-PFE)
TABLE 5 WAN PHY display parameters (Continued)
Parameter Description.