Choosing An Extended Isl Mode; Extended Isl Modes: Switches With Bloom Asic; Extended Isl Modes: Switches With Goldeneye Asic - HP A7533A - Brocade 4Gb SAN Switch Base User Manual

• Starting with Fabric OS 4.4.0, VC translation link initialization (an option of the
portCfgLongDistance command) is enabled by default for LD links. For previous Fabric OS
versions that support this option, it was disabled by default. To avoid inconsistency in the fabric, make
sure that this value is enabled on both ends of the link. To connect to switches running Fabric OS
versions earlier than 4.0.2 and 3.0.2c, make sure that VC translation link initialization is disabled
because these versions do not support it.

Choosing an extended ISL mode

Table 30 lists the extended ISL modes for switches that have a Bloom ASIC. You can configure extended
ISL odes with the portCfgLongDistance command when the Extended Fabrics license is activated.
Table 30

Extended ISL modes: switches with Bloom ASIC

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
1
LD Dynamic mode uses
automatic distance detection
for a user-specified distance
1
The dynamic long-distance mode (LD) configures the number of buffer credits required, based on the actual link distance.
2
For each data channel (in this case there are 4) thare are 5 credits, plus 6 extra credits.
Table 31 lists the extended ISL modes for switches that have a Goldeneye ASIC.
Table 31

Extended ISL modes: switches with Goldeneye ASIC

Mode Buffer Allocation
1 Gbps 2 Gbps
1
L0 5 (26) 5 (26)
LE 11 16
1
For each data channel (in this case, there are 4) there are 5 credits, plus 6 extra credits.
Table 32 lists the extended ISL modes for switches that have a Condor ASIC.
164 Administering extended fabrics
Buffer Allocation
1 Gbps 2 Gbps
2
5 (26) 5 (26)
13 19
19 34
27 54
60 64
Auto Auto
Distance at Distance at
1 Gbps 2 Gbps
4 Gbps
2.5 km 10 km 5 km
10 km N/A 10 km
Distance at Distance at
1 Gbps 2 Gbps
10 km 5 km
N/A 10 km
25 km 25 km
50 km 50 km
100 km 60 km
Auto Auto
Distance at Earliest Fabric
4 Gbps OS release
2 km All
5 km 3.x, 4.x
Earliest Extended
Fabric OS Fabrics
release License
Required?
All No
3.x, 4.x No
3.1.0, 4.1.0, Yes
4.x, 5.x
All Yes
All Yes
3.1.0, 4.1.0, Yes
4.4.0, 5.x
(depending on
the model)
Extended fabrics
license required?
No
No