Web Tools Administrator's Guide (53-1001772-01, June 2010)

Web Tools Administrator’s Guide 183
53-1001772-01
Configuring a port for long distance
14
DRAFT: BROCADE CONFIDENTIAL
The Brocade Encryption Switch and the FS8-18 Encryption blade support auto-negotiated link
speeds of 1, 2, 4, and 8 Gbps. The GE ports are always locked at 1 Gbps.
Configuring a port for long distance
When you configure a long-distance ISL, ensure that the ports on both sides of the ISL have the
same configuration in order to avoid fabric segmentation.
Use the following procedure to configure a port for long distance.
1. Open the Switch Administration window as described in “Opening the Switch Administration
window” on page 35.
2. Click Show Advanced Mode.
3. Select the Extended Fabric tab.
4. This step is switch-specific:
For Brocade DCX and Brocade 48000 enterprise-class platforms, click the slot subtab that
corresponds to the correct slot for the logical switch.
For Brocade 200E, 300, 4012, 4016, 4018, 4020, 4024, 4100, 4900, 5000, 5100, 5300,
7600 switches, the 7500, 7500E, 7800 Extension switches, and the Encryption Switch,
proceed directly to the next step.
5. Select a distance that corresponds to the port from the Long Distance menu.
Depending on the distance selected, this might require a license. For information about the
various distances, refer to Table 16.
If you select a long-distance setting of LD or LS, you must also enter a value in the Desired
Distance column for that port number:
TABLE 16 Long-distance settings and license requirements
Value Description Extended Fabrics 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
LD Dynamic setting is enabled. Buffer credits for the given E_Port are
dynamically configured based on the actual link distance, as long as this is
less than the desired distance. If the actual link distance exceeds the
desired distance, the desired distance is used to allocate the buffers.
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 switch platform and the
availability of frame buffers within the port group.
Yes
LS Static setting is enabled. Buffer credits for the given E_Port are statically
configured based on the desired link distance.
The LS-level link can operate at distances up to 500 km at 1 Gbps, 250 km
at 2 Gbps, or 125 km at 4 Gbit/sec, depending on the switch platform and
the availability of frame buffers within the port group
Yes