Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 53)

Multi-Service IronWare Switching Configuration Guide 23
53-1003036-02
10G WAN PHY fault and performance management
1
Alarm indication signal (AIS) The AIS is an all-ones characteristic or adapted information signal. It is
generated to replace the normal traffic signal when it contains a defect
condition in order to prevent consequential downstream failures being declared
or alarms being raised.
Line AIS defect is detected as a “111” pattern in bits 6, 7, and 8 of the K2 byte
in five consecutive frames. Line AIS defect is terminated when bits 6, 7, and 8 of
the K2 byte do not contain the code “111” for five consecutive frames.
STS-Path AIS defect is detected as all ones in bytes H1 and H2 in three
contiguous frames. STS-Path AIS defect is terminated when a valid STS Pointer
is detected with the NDF set to “1001” (inverted) for one frame, or “0110”
(normal) for three contiguous frames.
AIS can also be identified as follows:
•
Line alarm indication signal (AIS-L)
•
STS path alarm indication signal (SP-AIS)
•
VT path alarm indication signal (VP-AIS)
Remote error indication (REI) This is an indication returned to a transmitting node (source) that an errored
block has been detected at the receiving node (sink). This indication was
formerly known as far end block error (FEBE).
REI can also be identified as the following:
•
Line remote error indication (REI-L)
•
STS path remote error indication (REI-P)
•
VT path remote error indication (REI-V)
Remote defect indication (RDI) This is a signal returned to the transmitting terminating equipment upon
detecting a loss of signal, loss of frame, or AIS defect. RDI was previously known
as FERF.
RDI can also be identified as the following:
•
Line remote defect indication (RDI-L)
•
STS path remote defect indication (RDI-P)
•
VT path remote defect indication (RDI-V)
B1 error (coding violation, CV) Parity errors evaluated by byte B1 (BIP-8) of an STS-N are monitored. If any of
the eight parity checks fail, the corresponding block is assumed to be in error.
B2 error (coding violation, CV) Parity errors evaluated by byte B2 (BIP-24 x N) of an STS-N are monitored. If any
of the N x 24 parity checks fail, the corresponding block is assumed to be in
error.
B3 error (coding violation, CV) Parity errors evaluated by byte B3 (BIP-8) of a VT-N (N = 3, 4) are monitored. If
any of the eight parity checks fail, the corresponding block is assumed to be in
error.
Errored Seconds (ES) At each layer, an Errored Second (ES) is a second with one or more Coding
Violations at that layer OR one or more incoming defects (e.g., SEF, LOS, AIS,
LOP) at that layer has occurred.
Far end - This is an indication returned to a transmitting node (source) that an
errored block has been detected at the receiving node (sink). And Errored
seconds - far end indicate this error in terms of errored seconds.
ES can be identified as follows:
•
Section Errored seconds (ES-S)·
•
Line Errored seconds (ES-L), Line Errored seconds- Far end (ES-LFE)·
•
Path Errored seconds (ES-P), Path Errored seconds- Far end (ES-PFE)
TABLE 5 WAN PHY display parameters (Continued)
Parameter Description.