Specifications

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7-5

Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, Release 5.0(3)U2(2)

OL-25782-02

Chapter 7 Configuring Bidirectional Forwarding Detection for BGP

Configuring BFD

This section includes the following topics:

• Configuration Hierarchy, page 7-5

• Task Flow for Configuring BFD, page 7-5

• Enabling the BFD Feature, page 7-6

• Configuring Global BFD Parameters, page 7-6

• Configuring BFD on an Interface, page 7-8

• Configuring BFD on a Port Channel, page 7-9

• Configuring BFD Echo Function, page 7-10

• Optimizing BFD on Subinterfaces, page 7-11

• Configuring BFD on BGP, page 7-13

Configuration Hierarchy

You can configure BFD at the global level, VRF level, at the interface or port channel level, or at the

subinterface level (for physical interfaces and port channels). The VRF configuration overrides global

configuration. The interface or port channel configuration overrides VRF or global configuration. On

supported interfaces, the subinterface-level configuration overrides the interface or port channel

configuration unless subinterface optimization is enabled. See the “Optimizing BFD on Subinterfaces”

section on page 7-11 for more information.

For physical ports that are members of a port channel, the member port inherits the master port channel

BFD configuration. The member port subinterfaces can override the master port channel BFD

configuration, unless subinterface optimization is enabled.

Task Flow for Configuring BFD

Follow these steps to configure BFD:

Step 1 Enabling the BFD Feature.

Step 2 Configuring Global BFD Parameters or Configuring BFD on an Interface.

Step 3 Configuring BFD on BGP.

Slow timer 2000 milliseconds

Subinterface optimization Disabled

Table 7-1 Default BFD Parameters (continued)

Parameters Default