Operation, administration, and maintenance (OAM) features 2-81

Table 2-12

Egress WAN port and service alarms

Alarm

Description

Severity

 

 

 

STS Rx Loss of Multiframe

This alarm is raised when the multiframe

Critical, service affecting (C, SA)

 

indicator for an STS member of a virtually

 

 

concatenated group cannot be located.

 

 

This alarm is raised against an STS that

 

 

connects to the WAN port of a

 

 

2xGigE/FC-P2P circuit pack.

 

 

 

 

STS Rx Loss of Sequence

This alarm is raised when the received

Critical, service affecting (C, SA)

 

sequence number of an STS in a virtually

 

 

concatenated group does not match the

 

 

expected sequence number. This alarm

 

 

is raised against an STS that connects to

 

 

the WAN port of a 2xGigE/FC-P2P circuit

 

 

pack.

 

 

 

 

STS Rx Loss of Alignment

This alarm is raised when the STS

Critical, service affecting (C, SA)

 

members in a virtually concatenated

 

 

group cannot be aligned because of

 

 

excessive differential delay between the

 

 

STS members. This alarm is raised

 

 

against the slowest STS in the virtually

 

 

concatenated group that connects to the

 

 

WAN port of a 2xGigE/FC-P2P circuit

 

 

pack.

 

 

 

 

Rx Loss of Frame Delineation

This alarm is raised against the WAN port

Critical, service affecting (C, SA)

 

of a 2xGigE/FC-P2P circuit pack when

 

 

the GFP layer cannot detect valid GFP

 

 

frames.

 

 

This alarm only applies to GFP-T and

 

 

GFP-F mapping

 

 

 

 

Insufficient Link Capacity

This alarm is raised against the WAN port

Critical, service affecting (C, SA)

 

on the 2xGigE/FC-P2P circuit pack when

 

 

the bandwidth assigned to the WAN port

 

 

is insufficient to carry the provisioned

 

 

Fibre Channel service. This alarm is

 

 

applicable to full-rate Fibre Channel

 

 

service.

 

 

Full-rate Fibre Channel service requires:

 

 

STS-24c of bandwidth for concatenated

 

 

signals

 

 

STS1-19v or STS3c-6v of bandwidth for

 

 

virtually concatenated signals

 

 

This alarm applies only when the service

 

 

is FC100 or FICON with

 

 

SUBRATE=DISABLE.

 

 

 

 

Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004

Page 119
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Nortel Networks 3500, NTRN10AN manual Subrate=Disable