Nortel Networks 3500, NTRN10AN manual For Fibre Channel facilities , this alarm

Operation, administration, and maintenance (OAM) features 2-79

Table 2-11 (continued)

Ingress LAN port alarms

Alarm	Description	Severity
Rx Excessive Error ratio	This alarm is raised against the LAN port	Major, service affecting (Mj,SA)
	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.
Ethernet Loopback Active	This alarm is raised when a user	Minor, non service affecting,
	executes a loopback command on an	(mn,nsa)
	Ethernet facility of a 2xGigE/FC-P2P
	circuit pack. The alarm notifies other
	users that a loopback is active.
Fibre Channel Loopback Active	This alarm is raised when a user	Minor, non service affecting,
	executes a loopback command on a	(mn,nsa)
	Fibre Channel facility of a
	2xGigE/FC-P2P circuit pack. The alarm
	notifies other users that a loopback is
	active.

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.

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