Nortel Networks OPTera Metro 3500 - Manual (Page 117)

Operation, administration, and maintenance (OAM) features 2-79
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Rx Excessive Error ratio This alarm is raised against the LAN port
when one of the following conditions
occurs:
• For Ethernet facilities, this alarm is
raised when at least 20 percent of the
received frames are errored per second,
for 3 consecutive seconds.
For Fibre Channel facilities, this alarm
is raised when at least 20 percent of the
received 8B/10B codes are errored
(including symbol or disparity errors) per
second, for 3 consecutive seconds.
Major, service affecting (Mj,SA)
Ethernet Loopback Active This alarm is raised when a user
executes a loopback command on an
Ethernet facility of a 2xGigE/FC-P2P
circuit pack. The alarm notifies other
users that a loopback is active. Minor, non service affecting,
(mn,nsa)
Fibre Channel Loopback Active This alarm is raised when a user
executes a loopback command on a
Fibre Channel facility of a
2xGigE/FC-P2P circuit pack. The alarm
notifies other users that a loopback is
active. Minor, non service affecting,
(mn,nsa)
Note 1: When connected to a pair of Fibre Channel devices that support the auto negotiation (AN) of
1G and 2G link speeds, the speed of the ports connected to the 2xGigE/FC -P2P card must be
manually set to 1G (FC-100).
Note 2: 2xGigE/FC-P2P circuit pack does not adhere to the Fibre Channel Arbitrated Loop (FC-AL)
standard and therefore Fibre Channel Arbitrated Loop devices are not supported.
Table 2-11 (continued)
Ingress LAN port alarms
Alarm Description Severity