Nortel Networks 3500, NTRN10AN manual Fibre Channel facility, Mtu

Operation, administration, and maintenance (OAM) features 2-87

Table 2-13 (continued)

2xGigE/FC-P2P Ethernet port facility signal attributes

Signal Attribute	Definition	Values	Access
		(See Note 1)	(see Note 2)
MTU	Maximum Ethernet frame size supported.	1600, 9600	R/W
(Maximum Transfer	Packets above the MTU will be dropped
Unit)	and counted (LAN ingress) or truncated
	and sent with CRC error (WAN ingress).
PHYSADDR	Ethernet MAC address. Used as SA in	48-bit value	R/O
(Ethernet MAC	PAUSE frames.
address)
PAUSERXOVRRIDE	When auto-negotiation is enabled, the	Enable	R/O
(Pause Receive	Pause Receive Override is used to
Override)	override (disable) the negotiated PAUSE
	receive.

Note 1: Values in bold indicate defaults.

Note 2: R/O = Read Only, R/W = Read & Write (provisionable)

Note 3: When auto-negotiation is Disabled or In Progress, the attributes return Unknown.

Note 4: Asym = Pause frames sent only, Sym = Pause frames sent and received.

Note 5: For Gigabit Ethernet unidirectional drop and continue connections, at the "drop" nodes, if auto-negotiation (AN) is disabled, PAUSETX should be set to DISABLE. If auto-negotiation (AN) is enabled, FLOWCTRL should be set to "NONE". the 2xGigE/FC interface may cause PAUSE frames (if PAUSE TX = Enabled) to be transmitted if valid Ethernet frames are received by the "drop" nodes.

Fibre Channel facility

Table 2-14 on page 2-87, lists facility parameters supported by the 2xGigE/FC-P2P Fibre Channel LAN port.

Table 2-14

2xGigE/FC-P2P Fibre Channel port signal attributes

Signal Attribute	Definition	Values	Access
		(See Note 1)	(see Note 2)
SUBRATE	Indicates whether the service can be	Disable, Enable	R/W
(Subrate)	carried over a sub-rate bandwidth.
(See Note 4)
EXTREACH	Indicates whether the extended reach	Disable, Enable	R/W
(Extend reach)	mode of operation is used or not.
(See Note 3 & Note 4)
SERVICE	Indicates which service is carried	FC100, FICON	R/W
(Service)

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