HP A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual page 341

Extended ISL modes for switches that integrate the Bloom ASIC
Table 75 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 75 Extended ISL modes: 3xxx switches (Bloom and Bloom II ASICs)
Mode Buffer allocation
1 Gbps
L0 5 (26)
LE 13
2
L0.5 19
2
L1 27
2
L2 60
3
LD Auto
4
LS Based on
user-speci
fied
distance
1. For each data channel (in this case, there are 4) there are 5 credits, plus 6 extra credits.
2. This mode is supported but cannot be configured on switches running Fabric OS v5.2.0 and later.
3. The dynamic long-distance mode (LD) automatically configures the number of buffer credits required, based on the
actual link distance.
4. The static long-distance mode (LS) allocates the number of buffer credits based on the user-specified distance.
Distance @ 1
Gbps
2 Gbps
1
5 (26) 10 km
19 n/a
34 25 km
54 50 km
65 100 km
108 for
Bloom II
Auto Auto
Maximum is 200 km
Based on Based on
user-speci user-specified distance
fied
Maximum is 200 km
distance
Distance @ 2 Earliest
Gbps Fabric OS
release
5 km All
10 km v3.x, v4.x
25 km v3.1.0, v4.1.0,
v4.x, v5.x
50 km All
60 km All
100 km for Bloom
II
Auto v3.1.0, v4.1.0,
v4.4.0, v5.x
Maximum is 100
(depending on
km
the model)
Based on v5.1.0
user-specified
distance
Maximum is 100
km
Fabric OS 5.3.0 administrator guide 353
Extended
Fabrics
license
required?
No
No
Yes
Yes
Yes
Yes
Yes