Cisco N7K-C7010 Configuration Guide - Page 134
Default Settings, Configuring BFD
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Default Settings Chapter 5 Configuring Bidirectional Forwarding Detection Send document comments to [email protected] Note Using BFD per-link mode and sub-interface optimization simultaneously on a Layer 3 port channel is not supported. • HSRP for IPv4 is supported with BFD. HSRP for IPv6 is not supported with BFD. • BFD packets generated by supported the Cisco NX-OS device linecards are sent with COS 6/DSCP CS6. The DSCP/COS values for BFD packets are not user configurable. Default Settings Table 5-1 lists the default settings for BFD parameters. Table 5-1 Default BFD Parameters Parameters BFD feature Required minimum receive interval Desired minimum transmit interval Detect multiplier Echo function Mode Port channel Slow timer Subinterface optimization Default Disabled 50 milliseconds 50 milliseconds 3 Enabled Asynchronous Logical mode (one session per source-destination pair address). 2000 milliseconds Disabled Configuring BFD This section includes the following topics: • Configuration Hierarchy, page 5-7 • Task Flow for Configuring BFD, page 5-7 • Enabling the BFD Feature, page 5-7 • Configuring Global BFD Parameters, page 5-8 • Configuring BFD on an Interface, page 5-9 • Configuring BFD on a Port Channel, page 5-11 • Configuring BFD Echo Function, page 5-12 • Optimizing BFD on Subinterfaces, page 5-13 • Configuring BFD Support for Routing Protocols, page 5-14 Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x 5-6 OL-23435-03