Dell Brocade G620 Brocade 8.0.1 Fabric OS Troubleshooting and Diagnostics Guid - Page 46
Media-related issues, Testing the external transmit and receive path of a port
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Connectivity ∙ More than 126 logins attempted via an F_Port configured for default number of logins (126). ∙ portTrunkArea configured on edge switch but trunking license is missing on Access Gateway. ∙ Link level issues between edge switch and access gateway ∙ Other access gateway policy specific features like port grouping, advance device security To resolve this issue, follow these steps: 1. Identify all the affected F_Ports with duplicate ALPA entries and do the following for each port. 2. Print the ALPA map using the ag --printAlpaMap command. 3. Disable all the affected F_Ports with duplicate ALPA entries using the portDisable command. 4. Run the ag --clearAlpaMap command. 5. Enable the port using the portEnable command. Media-related issues This section provides procedures that help pinpoint any media-related issues, such as bad cables and SFPs, in the fabric. The tests listed in Table 6 are a combination of structural and functional tests that can be used to provide an overview of the hardware components and help identify media-related issues. ∙ Structural tests perform basic testing of the switch circuit. If a structural test fails, replace the main board or port blade. ∙ Functional tests verify the intended operational behavior of the switch by running frames through ports or bypass circuitry. TABLE 6 Component test descriptions Test name portTest spinFab Checks Used to isolate problems to a single replaceable element and isolate problems to near-end terminal equipment, far-end terminal equipment, or transmission line. Diagnostics can be executed every day or on demand. Tests switch-to-switch ISL cabling and trunk group operations. The following procedures are for checking switch-specific components. Testing the external transmit and receive path of a port 1. Connect to the switch and log in as admin. 2. Connect the port you want to test to any other switch port with the cable you want to test. 3. Enter the portLoopbackTest -lb_mode 2 command. Testing the internal components of a switch 1. Connect to the switch and log in as admin. 2. Connect the port you want to test to any other switch port with the cable you want to test. 3. Enter the portLoopbackTest -lb_mode 5 command where 5 is the operand that causes the test to run on the internal switch components. Brocade Fabric OS Troubleshooting and Diagnostics Guide 46 53-1004126-01
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