Technical data

Fabric OS Administrator’s Guide 11-5
Publication Number: 53-0000518-09
Choosing an Extended ISL Mode
11
• If you set one external port to L2 (60 km) and the other external port is an E_Port, then one internal
port is disabled.
• Setting both external ports to L1 (50 km) disables two internal ports.
• Setting one external port to L1 (50 km) and the other external port to L0.5 (25 km) disables one
internal port.
• If you set one external port to L1 (50 km) and the other external port is an E_Port, then one internal
port is disabled.
• Setting both external ports to L0.5 (25 km) disables one internal port.
SilkWorm 3250, 3850, 3900, 12000, 24000, and 48000 (FC2-16 port blades)
The number of ports that can be configured per port group at various distances is summarized
in Table 11-4.
SilkWorm 4100
The number of ports that can be configured at various distances is summarized in Table 11-5.
Table 11-4 SilkWorm 3250, 3850, 3900, 12000, 24000, and 48000
(FC2-16 port blades)
Speed
(Gbit/sec)
Number of Ports Allowed at Distance (km)
10 km 25 km 50 km 100 km 250 km 500 km
1 4 ports 4 ports L1 mode: 4
ports
LD mode: 3
ports
up to 2
ports
n/a n/a
2 4 ports 3 ports up to 2
ports
1port n/a n/a
4 n/a n/a n/a n/a n/a n/a
Table 11-5 SilkWorm 4100
Speed
(Gbit/sec)
Number of Ports Allowed at Distance (km)
10 km 25 km 50 km 100 km 250 km 500 km
1 32 ports 32 ports 32 ports up to 15
ports
up to 6
ports
up to 3
ports
2 32 ports 32 ports up to 15
ports
up to 7
ports
up to 3
ports
n/a
4 32 ports up to 15
ports
up to 7
ports
up to 3
ports
n/a n/a