Cisco ONS 15454 - 2.7.85 ENCAP-MISMATCH-P

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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 2 Alarm Troubleshooting
2.7.85 ENCAP-MISMATCH-P
Step 2 If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
for more information or call Cisco TAC 1 800 553-2447 in order to report a Service-Affecting (SA)
problem.
2.7.85 ENCAP-MISMATCH-P
Default Severity: Critical (CR), Service-Affecting (SA)
SONET Logical Object: STSTRM
The Encapsulation C2 Byte Mismatch Path alarm applies to ML-Series Ethernet cards or the CE-1000
card. It occurs when the first three following conditions are met and one of the last two is false:
• The received C2 byte is not 0x00 (unequipped).
• The received C2 byte is not a PDI value.
• The received C2 does not match the expected C2.
• The expected C2 byte is not 0x01 (equipped unspecified).
• The received C2 byte is not 0x01 (equipped unspecified).
(This is in contrast to the “PLM-P” alarm on page 2-195, which must meet all five criteria.) For an
ENCAP-MISMATCH-P to be raised, there is a mismatch between the received and expected C2 byte,
with either the expected byte or received byte value being 0x01.
For example, an ENCAP-MISMATCH-P alarm is raised if a circuit created between two ML-Series or
two CE-1000 cards has generic framing procedure (GFP) framing provisioned on one end and HDLC
framing with LEX encapsulation provisioned on the other. The GFP framing card transmits and expects
a C2 byte of 0x1B, while the HDLC framing card transmits and expects a C2 byte of 0x01.
A mismatch between the transmit and receive cards on any of the following parameters can cause the
alarm:
• Mode (HDLC, GFP-F)
• Encapsulation (LEX, HDLC, PPP)
• CRC size (16 or 32)
• Scrambling state (on or off)
This alarm is demoted by a “PLM-P” condition on page 2-195 or a “PLM-V” condition on page 2-196.
Note By default, an ENCAP-MISMATCH-P alarm causes an ML-Series or CE-1000 card data link to go
down. This behavior can be modified using the command line interface (CLI) command in interface
configuration mode: no pos trigger defect encap.
Note For more information about the ML-Series or CE-1000 Ethernet cards, refer to the
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration
Guide.