Administrator's Guide v4.1.1 Manual

• Check the that fabric membership information is what you expect. Refer to Verifying the fabric on
page 683.
• Ensure that MAC addresses are not moving among ports. Refer to Checking for MAC address
movement among ports on page 683.
• Ensure that no edge port has an external loopback. Refer to Verifying edge ports have no external
loopback on page 683.
Verifying the fabric
Enter the show fabric all command and ensure that information about all switches in the VCS Fabric
cluster is displayed.
switch# show fabric all
VCS Id: 1
Config Mode: Local-Only
Rbridge-id WWN IP Address Name
---------------------------------------------------------------------
1 50:00:51:E4:44:40:0E:04 0.0.0.0 "fcr_fd_1"
2 50:00:51:E4:44:50:0F:09 0.0.0.0 "fcr_xd_2_128"
60 10:00:00:05:33:5F:EA:A4 10.24.81.65 "switch"
66 10:00:00:05:33:67:26:78 10.24.81.66 >"switch"
The Fabric has 4 Rbridge(s)
Checking for MAC address movement among ports
MAC address movement from port to port occurs when the same source address is detected on
multiple ports. This condition is sometimes known as "MAC address flapping."
To check for MAC address flapping, enter the show mac-address-table command multiple times and
check the output.
Verifying edge ports have no external loopback
Physically check for extended loopback.
FCoE devices unable to log in
The inability to log in from a device connected through FCoE is usually because either the port or LLDP
has been incorrectly configured. Potential reasons include:
• The default profile map has not been applied correctly. Refer to Verifying the default profile map on
page 684.
• Required TLVs have not been advertised under LLDP. Refer to Verifying TLVs on page 684.
Verifying CNA login
If CNAs are not logging into the switch, perform the following procedure.
1. Check that the physical port is provisioned for FCOE.
switch# show fcoe interface ethernet | include "1/0/5"
TenGigaBitEthernet 1/0/5 default
2. If the physical port is not provisioned, provision the interface for FCOE.
3. If the CNA is still not logging in, check that the logical FCOE interface is online by using the show
running-config interface fcoe command, as in the following example:
switch# show running-config interface fcoe
interface Fcoe 1/11/1
no shutdown
!
Verifying the fabric
Network OS Administrator’s Guide 683
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