HP StorageWorks 1606 Brocade Fabric OS Administrator's Guide v6.3.0 (53-100133 - Page 489
Configuring an extended ISL
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Configuring an extended ISL 20 Configuring an extended ISL Before configuring an extended ISL, ensure that the following conditions are met: • The ports on both ends of the ISL are operating at the same port speed, and can be configured at the same distance level without compromising local switch performance. NOTE A long-distance link also can be configured to be part of a trunk group. Two or more long-distance links in a port group form a trunk group when they are configured for the same speed, the same distance level, and their link distances are nearly equal. For information on trunking concepts and configurations, refer to Chapter 19, "Managing Trunking Connections". • Only qualified Brocade SFPs are used. Only Brocade-branded or certain Brocade-qualified SFPs are supported on the 8 Gbps platforms. 1. Connect to the switch and log in using an account assigned to the admin role. 2. Enter the switchDisable command. 3. Enter the configure command to set the switch fabric-wide configurations. You can set the following fabric-wide settings: (* = multiplication symbol) Field Type Domain R_A_TOV E_D_TOV WAN_TOV MAX_HOPS Number Number Number Number Number Default 1 1000 2000 0 7 Range Varies E_D_TOV * 2 to 120000 1000 to R_A_TOV/2 0 to R_A_TOV/4 7 to 19 4. For 8 Gbps platforms only, enter the portCfgFillword command to set ARB as the fill word. portcfgfillword [slot/]port, mode The mode parameter in this command must be set to 1 if the vc_translation_link_init parameter in the portCfgLongDistance command (in the next step) is set to 1. 5. Enter the portCfgLongDistance command. portcfglongdistance [slot/]port [distance_level] [vc_translation_link_init] [desired_distance] 6. Repeat step 5 and step 4 for the remote extended ISL port. Both the local and remote extended ISL ports must be configured to the same distance level. When the connection is initiated, the fabric will reconfigure. Example The following example configures slot 1, port 2 to support a 100 km link in LS mode and be initialized using the extended link initialization sequence. This example is for an 8 Gbps platform. switch:admin> portcfgfillword 1/2 1 switch:admin> portcfglongdistance 1/2 LS 1 100 Reserved Buffers = 406 Warning: port may be reserving more credits depending on port speed. switch:admin> portshow 1/2 portName: portHealth: OFFLINE Fabric OS Administrator's Guide 447 53-1001336-01
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