Technical data

Fabric OS Administrator’s Guide 12-9
Publication Number: 53-0000518-09
Trunking Over Extended Fabrics
12
This example shows three trunking groups (1, 2, and 3); ports 1, 4, and 14 are masters:
Trunking Over Extended Fabrics
In addition to the criteria listed in “Standard Trunking Criteria” on page 12-2, observe the following
criteria for trunking over extended fabrics:
• ISL Trunking over extended fabrics is supported on switches running Fabric OS v3.2.0 (or later) or
v4.4.0 (or later).
• Extended Fabrics and ISL Trunking licenses are required on all participating switches.
• The vc_translation_link_init parameter must be set the same on all ports in an extended trunk.
(For details on this parameter, see page 11-8.)
Troubleshooting Trunking Problems
If you have difficulty with trunking, try the solutions in this section.
Listing Link Characteristics
If a link that is part of an ISL Trunk fails, use the trunkDebug command to troubleshoot the problem,
as shown in the following procedure:
1. Connect to the switch and log in as admin.
2. Enter the following command:
The trunkDebug command displays the possible reason that two ports cannot be trunked, including the
following reasons:
• The switch does not support trunking.
• A trunking license is required.
switch:admin> trunkshow
1: 1 -> 1 10:00:00:60:69:04:10:83 deskew 16 Master
0 -> 0 10:00:00:60:69:04:10:83 deskew 15
2: 4 -> 4 10:00:00:60:69:04:01:94 deskew 16 Master
5 -> 5 10:00:00:60:69:04:01:94 deskew 15
7 -> 7 10:00:00:60:69:04:01:94 deskew 17
6 -> 6 10:00:00:60:69:04:01:94 deskew 16
3:14 -> 14 10:00:00:60:69:04:10:83 deskew 16 Master
15 -> 15 10:00:00:60:69:04:10:83 deskew 15
switch:admin>
trunkDebug port, port
port Specifies the number of a port in an ISL Trunking group.