HP StorageWorks Fabric OS 5.2.x administrator guide (5697-0014, November 2009)

326 Administering Extended Fabrics
versions earlier than v4.0.2 and v3.0.2c, make sure that VC translation link initialization is disabled
because these versions do not support it.
Choosing an Extended ISL mode
Table 67 lists the extended ISL modes for switches that have a Bloom ASIC. You can configure extended ISL
modes with the portCfgLongDistance command when the Extended Fabrics license is activated.
Table 67 Extended ISL modes: switches with Bloom and Bloom II ASICs
Mode Description Buffer allocation Distance @ 1
Gbit/sec
Distance @ 2
Gbit/sec
Earliest Fabric
OS release
Extended
fabrics
license
required?
1
Gbit/sec
2
Gbit/sec
L0 Level 0 static
mode, the default.
5 (26)
1
5 (26) 10 km 5 km All No
LE Level E static
mode, supports
links beyond 5
km.
13 19 n/a 10 km v3.x, v4.x No
L0.5 Level 0.5 static
mode (designated
LM when listed
with the
portcfgshow
command).
19 34 25 km 25 km v3.1.0, v4.1.0,
v4.x, 5.x
Yes
L1 Level 1 static
mode.
27 54 50 km 50 km All Yes
L2 Level 2 static
mode.
60 65
108 for
Bloom II
100 km 60 km
100 k m for
Bloom II
All Yes
LD
2
Dynamic mode
uses automatic
distance detection
for a
user-specified
distance.
Auto Auto Auto
(Maximum is
200 km)
Auto
(Maximum is
100 k m)
v3.1.0, v4.1.0,
v4.4.0, 5.x
(depending on
the model)
Yes
LS
3
Static long
distance mode
that uses the
user-specified link
distance.
Based on
user-spec
ified
distance
Based on
user-spec
ified
distance
Based on
user-specified
distance
(Maximum is
200 km)
Based on
user-specified
distance
(Maximum is
100 k m)
5.1.x Yes
1. For each data channel (in this case, there are 4) there are 5 credits, plus 6 extra credits.
2. The dynamic long-distance mode (LD) automatically configures the number of buffer credits required, based on the actual link distance.
3. The static long-distance mode (LS) allocates the number of buffer credits based on the user-specified distance.