HP StorageWorks MSA 2/8 - SAN Switch, Reference Manual

Page: 543 / 982

portCfgLongDistance
543 Fabric OS Version 3.1.x/4.1.x Reference Guide
■
LD: Dynamic long distance configuration. The buffer credits for the given
E-port are automatically configured based on the actual link distance. Up to a
total of 63 full size frame buffers will be reserved depending upon the
distance measured during E-port initialization.
The option “VC Translation Link Init” is used to enable the long distance link
initialization sequence. By default this option is set to 0 (disabled).
An input of Ctrl-D cancels the configuration update.
When a port is configured to be a long distance port, the output of
portshow
and
switchshow
will print the long distance level. In the
portshow
output,
the long distance level is indicated as follows,
■
L0 - normal
■
LE - standard <= 10km
■
L0.5(LM) - medium long <= 25km
■
L1 - long <= 50km
■
L2 - super long <= 100km
■
LD - auto
In the
switchshow
output, the long distance mode is displayed as “Lx,” where
x is the second letter in two letter distance level code described above.
Note: Trunking is not supported with LE, L1, and L2
portcfglongdistance
modes. Trunking is supported for normal E_Ports (referred to as L0 in
portcfglongdistance
command) with LWL media up to 5km at the full speed
permitted by the link. With LWL media, the throughput begins to fall off beyond 5km,
due to normal latency effects.
Refer to the
HP StorageWorks Extended Fabric Version 3.1.x/4.1.x User Guide
for
more information.