HP 377707-002 User Manual page 62

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Table 5-9: Topology Port Properties Window Fields (Continued)
Field
Link Speed Active
Link Speed Enabled
Neighbor MTU
Master SM SL
VL Cap
VL High Limit
VL Arb High Cap
Vl Arb Low Cap
MTU Cap
VL Stall Count
HOQ Life
Oper VL
Description
Speed of an active link. The value is 1 (2.5 Gbps).
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).
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.
Administrative service level required for this port to send a non-
SMP message to the SM.
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.
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.
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.
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.
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.
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.
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.
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.