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 km 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 km)
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 km)
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.
Summary of Contents for AE370A - Brocade 4Gb SAN Switch 4/12
Page 18: ...18 ...
Page 82: ...82 Managing user accounts ...
Page 102: ...102 Configuring standard security features ...
Page 126: ...126 Maintaining configurations ...
Page 198: ...198 Routing traffic ...
Page 238: ...238 Using the FC FC routing service ...
Page 260: ...260 Administering FICON fabrics ...
Page 280: ...280 Working with diagnostic features ...
Page 332: ...332 Administering Extended Fabrics ...
Page 414: ...398 Configuring the PID format ...
Page 420: ...404 Configuring interoperability mode ...
Page 426: ...410 Understanding legacy password behaviour ...
Page 442: ...426 ...
Page 444: ......
Page 447: ......