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Troubleshooting Dropped FIP Traffic

Problem

Description: Fibre Channel over Ethernet (FCoE) Initialization Protocol (FIP) traffic such as FIP VLAN discovery and notification frames is dropped.

Cause

The interface on which the FIP traffic is dropped does not have a native VLAN configured. FIP VLAN discovery and notification messages are exchanged as untagged packets on the native VLAN. (After the FCoE session with the Fibre Channel switch is established, FCoE traffic uses the FCoE VLAN.)

Solution

Check to ensure that every 10-Gigabit Ethernet interface that connects to an FCoE device includes a native VLAN. Configure a native VLAN on all 10-Gigabit Ethernet interfaces that connect to FCoE devices.

Note: Make sure that the native VLAN you are using is the same native VLAN that the FCoE devices use for Ethernet traffic.

The procedure for configuring a native VLAN on an interface is different on switches that use the original CLI than on switches that use the Enhanced Layer 2 Software (ELS) CLI. This topic provides the configuration procedure for each CLI.

Configuring a Native VLAN on Switches Using the Original CLI

To configure a native VLAN on an interface:

  1. Set the interface port mode to tagged-access if you have not already done so:
    [edit]
    user@switch# set interfaces interface unit unit family ethernet-switching port-mode tagged-access

    For example, to set the port mode to tagged-access for interface xe-0/0/6.0:

    [edit]
    user@switch# set interfaces xe-0/0/6 unit 0 family ethernet-switching port-mode tagged-access


  2. Configure the native VLAN if it does not already exist:
    [edit]
    user@switch# set vlans vlan-name vlan-id vlan-id

    For example, to name the native VLAN native and use the VLAN ID 1:

    [edit]
    user@switch# set vlans native vlan-id 1


  3. Configure the native VLAN on the interface:
    [edit]
    user@switch# set interfaces interface unit unit family ethernet-switching native-vlan-id vlan-id

    For example, to configure a native VLAN with the VLAN ID 1 on interface xe-0/0/6.0:

    [edit]
    user@switch# set interfaces xe-0/0/6 unit 0 family ethernet-switching native-vlan-id 1


Configuring a Native VLAN on Switches Using the ELS CLI

To configure a native VLAN on an interface:

  1. Set the interface mode to trunk if you have not already done so:
    [edit]
    user@switch# set interfaces interface unit unit family ethernet-switching interface-mode trunk

    For example, to set the interface mode to trunk for interface xe-0/0/6.0:

    [edit]
    user@switch# set interfaces xe-0/0/6 unit 0 family ethernet-switching interface-mode trunk


  2. Configure the native VLAN if it does not already exist:
    [edit]
    user@switch# set vlans vlan-name vlan-id vlan-id

    For example, to name the native VLAN native and use the VLAN ID 1:

    [edit]
    user@switch# set vlans native vlan-id 1


  3. Configure the native VLAN on the physical Ethernet interface:
    [edit]
    user@switch# set interfaces interface native-vlan-id vlan-id

    For example, to configure a native VLAN with the VLAN ID 1 on interface xe-0/0/6.0:

    [edit]
    user@switch# set interfaces xe-0/0/6 native-vlan-id 1


  4. Configure the Ethernet interface as a member of the native VLAN:
    [edit]
    user@switch# set interfaces interface unit unit family ethernet-switching vlan members vlan-name

    For example, to configure an Ethernet interface as a member of a native VLAN with the VLAN ID 1 on interface xe-0/0/6.0:

    [edit]
    user@switch# set interfaces xe-0/0/6 unit 0 family ethernet-switching vlan members native


 

Related Documentation

 

Published: 2014-07-23

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