HP StorageWorks Fabric OS 5.0.0 Advanced Web Tools User Guide (AA-RW1RA-TE, May 2005)

Fabric OS 5.0.0 Advanced Web Tools user guide 55
Configuring a port for long distance
The Extended Fabric tab of the Switch Admin module displays information about the port speed, long
distance setting, and buffer credits, as shown in Figure 11 on page 56. Use this tab to configure the
long-distance setting of a port. For detailed information on managing extended fabrics, refer to the HP
StorageWorks Fabric OS 4.x procedures user guide.
When you configure a long-distance ISL, ensure that the ports on both sides of the ISL have the same
configuration to avoid fabric segmentation.
The port speed is displayed as follows:
• 1G for 1 Gbps
• 2G for 2 Gbps
• 4G for 4 Gbps
• N1 for Negotiated 1 Gbps
• N2 for Negotiated 2 Gbps
• N4 for Negotiated 4 Gbps
• Auto-Negotiation
Table 6 describes the long-distance settings and identifies settings that require an HP Extended Fabrics
license.
Table 6 Long-distance settings and license requirements
Value Description Extended fabric license
required
L0 No long-distance setting is enabled. The maximum
supported link distance is 10 km, 5 km, or 2.5 km
for ports at speeds of 1 Gbps, 2 Gbps, and
4 Gbps, respectively.
No
LE Extended normal setting is enabled, 10 km
(6 miles) or less.
No
L0.5 25 km (15.5 miles) or less. Yes
L1 Medium long-distance setting is enabled, 50 km
(31 miles) or less.
Yes
L2 Long-distance setting is enabled, 100 km
(62 miles) or less.
Yes
LD Dynamic setting is enabled. The LD-level link can
operate at distances up to 500 km at 1 Gbps, 250
km at 2 Gbps, or 125 km at 4 Gbps, depending
on the availability of frame buffers within the port
group.
Yes