Choosing An Extended Isl Mode - HP AA979A - StorageWorks SAN Switch 2/8V Administrator's Manual

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
L0 Level 0 static
mode, the default.
LE Level E static
mode, supports
links beyond 5
km.
L0.5 Level 0.5 static
mode (designated
LM when listed
with the
portcfgshow
command).
L1 Level 1 static
mode.
L2 Level 2 static
mode.
2
LD Dynamic mode
uses automatic
distance detection
for a
user-specified
distance.
3
LS Static long
distance mode
that uses the
user-specified link
distance.
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.
326 Administering Extended Fabrics
Buffer allocation Distance @ 1
Gbit/sec
1 2
Gbit/sec Gbit/sec
1
5 (26) 5 (26) 10 km
13 19 n/a
19 34 25 km
27 54 50 km
60 65 100 km
108 for
Bloom II
Auto Auto Auto
(Maximum is
200 km)
Based on Based on Based on
user-spec user-spec user-specified
ified ified distance
distance distance
(Maximum is
200 km)
Distance @ 2 Earliest Fabric
Gbit/sec OS release
5 km All
10 km v3.x, v4.x
25 km v3.1.0, v4.1.0,
v4.x, 5.x
50 km All
60 km All
100 km for
Bloom II
Auto v3.1.0, v4.1.0,
v4.4.0, 5.x
(Maximum is
(depending on
100 km)
the model)
Based on 5.1.x
user-specified
distance
(Maximum is
100 km)
Extended
fabrics
license
required?
No
No
Yes
Yes
Yes
Yes
Yes