ISL maximums
You can use all full-rate ports on all C-series Fibre Channel switches for ISLs, with a maximum of one
half of the total ISL port count configured to the same destination switch. Table 51 lists the ISL maximums
for switches with higher port counts.
Table 51 ISL maximums
Number of ports allowed as ISLs
Total number of
available user
portsSwitch
48 at 1 Gb/s48
MDS 9xxx 48-port 8 Gb/s Host-Optimized
Fibre Channel Switching Module
48 at 2 Gb/s48
MDS 95xx 48-port 8 Gb/s Performance
Fibre Channel Switching Module
24 at 4 Gb/s24
MDS 95xx 24-port 8 Gb/s Fibre Channel
Switching Module
48 at 1 Gb/s48MDS 9xxx 48-port 4 Gb/s Fibre Channel
Switching Module
24 at 2 Gb/s24MDS 9xxx 24-port 4 Gb/s Fibre Channel
Switching Module
12 at 4 Gb/s12MDS 9xxx 12-port 4 Gb/s Fibre Channel
Switching Module
20 at 4 Gb/s20MDS 9020
4 at 10 Gb/s4MDS 9xxx 4-port 10 Gb/s Fibre Channel
Switching Module
8 at 2 Gb/s
1
32MDS 9xxx 32-port 2 Gb/s Fibre Channel
Switching Module
16 at 2 Gb/s16MDS 9xxx 16-port 2 Gb/s Fibre Channel
Switching Module
14 at 2 Gb/s14MDS 9xxx 14/2 Multiprotocol Services
Module
18 at 2 Gb/s18MDS 9xxx 18/4 Multiservice Module
4 at 2 Gb/s
1
20MDS 9120
8 at 2 Gb/s
1
40MDS 9140
24 at 4 Gb/s24MDS 9124 Fabric
8 at 4 Gb/s8MDS 9124e Fabric
32 at 4 Gb/s
2 at 10 Gb/s
34MDS 9134 Fabric
1
Three user ports must be disabled for each port configured as an ISL.
SAN Design Reference Guide 149
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