HP 377707-002 Link Speed Active, Link Speed Enabled, Neighbor MTU, Master SM SL, VL Cap, MTU Cap

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Table 5-9:Topology Port Properties Window Fields (Continued)

Field	Description
Link Speed Active	Speed of an active link. The value is 1 (2.5 Gbps).
Link Speed Enabled	Maximum speed the link is capable of handling. The value is 0
	(No state change), 1 (2.5 Gbps), or 3 (value derived from link-
	speed-supported).
Neighbor MTU	Active maximum transmission unit enabled on this port for
	transmit. Check the mtu-cap value at both ends of every link and
	use the lesser speed. The value is mtu256, mtu512, mtu1024,
	mtu2048, or mtu4096.
Master SM SL	Administrative service level required for this port to send a non-
	SMP message to the SM.
VL Cap	Maximum range of data virtual lanes supported by this port. The
	value is vl0, vl0ToVl1, vl0ToVl3, vl0ToVl7, or vl0ToVl14.
	Refer also to oper-VL. Each port can support up to fifteen
	virtual lanes (VLs 0 - 15). The VL-cap field displays the range
	of those lanes (for example, lanes 0 - 7) that the port currently
	supports.
VL High Limit	Maximum high-priority limit on the number of bytes allowed
	for transmitting high-priority packets when both ends of a link
	operate with multiple data virtual-lanes. Used with the virtual-
	lane arbitration table. The maximum high-limit is determined by
	checking the vl-arb-high-cap on the other side of the link and
	then negotiating downward.
VL Arb High Cap	Highest arbitration value allowed by the arbiter in determining
	the next packet in a set of packets to send across the link. Used
	with the virtual-lane arbitration table and specified as a VL/
	Weight pair. Refer to section 14.2.5.9, VL Arbitration Table,
	“InfiniBand® Architecture, Vol. 1, Release 1.0”, for more
	information.
Vl Arb Low Cap	Lowest arbitration value allowed by the arbiter in determining
	the next packet in a set of packets to send across the link. Used
	with the virtual-lane arbitration table and specified as a VL/
	Weight pair. Refer to section 14.2.5.9, VL Arbitration Table,
	“InfiniBand® Architecture, Vol. 1, Release 1.0”, for more
	information.
MTU Cap	Used in conjunction with neighbor-mtu to determine the
	maximum transmission size supported on this port. The lesser of
	mtu-cap and neighbor-mtu determines the actual MTU used.
	The value is 256, 512, 1024, 2048, or 4096.
VL Stall Count	Number of sequentially dropped packets at which the port enters
	a VLStalled state. The virtual lane exits the VLStalled state (8 *
	HLL) units after entering it. Refer to section 18.2.5.4,
	Transmitter Queuing, “InfiniBand® Architecture, Vol. 1,
	Release 1.0”, for a description of HLL.
HOQ Life	Maximum duration allowed to packets at the head of a virtual-
	lane queue. Used with VL-stall-count to determine the outgoing
	packets to discard.
Oper VL	Administrative limit for the number of virtual lanes allowed to
	the link. Do not set this above the VL-cap value. The value is
	vl0, vl0-Vl1, vl0-Vl3, vl0-Vl7, or vl0-Vl14.