Configuring BFD Configuring BFD
OmniSwitch AOS Release 6 Network Configuration Guide September 2009 page 30-13
Configuring BFD
Configuring BFD for your network requires a two-fold approach as described below:
1 Configure a BFD interface and related session parameter values. Once configured, enable all participat-
ing BFD interfaces before configuring BFD interoperability with the supported Layer 3 protocols. See
“Configuring BFD Session Parameters” on page 30-13 for more information.
2 Configure BFD support for the Layer 3 protocols for which BFD will establish sessions. This imple-
mentation of BFD supports the IPv4 versions of BGP, OSPF, VRRP remote tracking, and static routes.
See “Configuring BFD Support for Layer 3 Protocols” on page 30-18 for more information.
At the end of the chapter is a simple BFD network diagram with instructions on how it was created on a
router-by-router basis. See “BFD Application Example” on page 30-25 for more information.
Configuring BFD Session Parameters
The following BFD interface parameter values are used to create, monitor, and negotiate BFD sessions
between peers.
• BFD interface status (see “Configuring a BFD Interface” on page 30-14).
• Transmit time interval (see “Configuring the BFD Transmit Time interval” on page 30-14).
• Receive time interval (see “Configuring the BFD Receive Time Interval” on page 30-14).
• Layer 2 hold-down timer (see “Configuring the BFD Layer 2 Hold-Timer” on page 30-16).
• Multiplier (see “Configuring the BFD Multiplier” on page 30-16).
• Operating mode (see “Configuring the BFD Operating Mode” on page 30-15).
• Echo interval (see “Configuring the BFD Echo interval” on page 30-15).
When a BFD interface is created, default values are automatically set for these parameters. However, if
necessary, it is possible to change these parameter values on a global basis (new value is applied to all
BFD interfaces) or for a specific BFD interface.
Note. A BFD interface is disabled by default when the interface is created. Once the interface is enabled,
parameter values are no longer configurable. To subsequently change parameter values, disable the BFD
interface. See “Enabling or Disabling BFD Status” on page 30-16 for more information.
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