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Additional Base Network Configuration
BIG-IP® Reference Guide 3-17
To set the fail-over timeout and arm the fail-safe using the
Configuration utility
1. In the navigation pane, click Network.
The VLAN screen opens.
2. Click the VLAN name in the list.
The properties screen for that VLAN opens.
3. Check the Arm Failsafe box and specify the timeout in seconds in
the Timeout box.
To set the fail-over timeout and arm the fail-safe from the
command line
Using the vlan command, you may set the timeout period and also arm or
disarm the fail-safe.
To set the timeout, type:
b vlan <vlan_name> timeout <timeout_in_seconds>
To arm the fail-safe, type:
b vlan <vlan_name> failsafe arm
To disarm the fail-safe, type:
b vlan <vlan_name> failsafe disarm
Setting the MAC masquerade address
You can share the media access control (MAC) masquerade address
between BIG-IP units in a redundant pair. This has the following
advantages:
Increased reliability and failover speed, especially in lossy networks
Interoperability with switches that are slow to respond to the network
changes
Interoperability with switches that are configured to ignore network
changes
The MAC address for a VLAN is the MAC address of the first interface to
be mapped to the VLAN, typically 4.1 for external and 5.1 for internal. You
can view the interfaces mapped to a VLAN using the following command:
b vlan show
You can view the MAC addresses for the interfaces on the BIG-IP using the
following command:
b interface show verbose
Use the following syntax to set the MAC masquerade address that will be
shared by both BIG-IP units in the redundant system.
b vlan <vlan_name> mac_masq <MAC_addr>
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