HP FlexFabric 12900 series Troubleshooting Manual page 62

If you do not use an intermediate device, verify that each pair of member chassis has a

dedicated BFD MAD link.
If you use an intermediate device, verify that each member chassis has a dedicated BFD MAD

link with the intermediate device.
2. Verify that all physical ports used for BFD MAD are up:
a. Execute the display interface command.
b. Check the current state field in the command output:
If the field displays DOWN ( Administratively ) for a port, execute the undo shutdown
−
command to bring up the port.
If the field displays DOWN for a port, check the physical link for a link failure.
−
3. Verify that the BFD MAD VLAN interface is configured correctly:
a. Execute the display mad verbose command.
b. Check the MAD BFD enabled interface field to verify that VLAN-interface 1 is not used for BFD
MAD.
c. If VLAN-interface 1 is used for BFD MAD, disable BFD MAD on VLAN-interface 1, and then
enable BFD MAD on another VLAN interface.
d. Verify that the BFD MAD-enabled VLAN interface does not have any other features, including
VPN.
e. Execute the display interface command to verify that the interface does not have the following
IP addresses:
− IP address assigned by using the ip address command.
VRRP virtual IP address.
−
4. Verify that the BFD MAD VLAN and physical ports in the VLAN are configured correctly:
a. Execute the display vlan command to verify the following items:
The BFD VLAN contains all physical ports used for BFD MAD.
−
− The BFD VLAN does not contain physical ports that are not used for BFD MAD.
If an intermediate device is used, you must also perform this step on the intermediate device.
b. Execute the display interface command to verify that the physical ports in the BFD VLAN are not
configured with any features.
For BFD MAD to operate correctly, you must disable all features on the physical ports in the
BFD MAD VLAN, including the spanning tree feature, ARP, and LACP.
5. Verify that the MAD IP addresses are correct:
a. Execute the display mad verbose command.
b. Check the mad ip address field to verify the following items:
− Each member chassis has a MAD IP address.
All MAD IP addresses are on the same subnet.
−
The MAD IP addresses are not addresses being used on the IRF fabric.
−
6. If the network has multiple IRF fabrics, execute the display mad verbose command to verify that
their BFD MAD VLANs are different.
7. Verify that the physical ports in the BFD MAD VLAN are always up:
a. Execute the display trapbuffer command or use system logs to check for BFD MAD port-down
events that occurred around the split time.
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