Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 187

View the established sessions using the command show bfd neighbors, as shown in the following example. R2(conf-if-vl-200)#bfd neighbor 2.2.3.2 R2(conf-if-vl-200)#do show bfd neighbors * Ad Dn C I O R V - Active session role - Admin Down - CLI - ISIS - OSPF - Static Route (RTM) - VRRP LocalAddr * 2.2.3.2 RemoteAddr 2.2.3.1 Interface State Rx-int Tx-int Mult Clients Vl 200 Up 100 100 3 C Changing session parameters BFD sessions are configured with default intervals and a default role. The parameters that can be configured are: Desired TX Interval, Required Min RX Interval, Detection Multiplier, and system role. These parameters are configured per interface; if a configuration change is made, the change affects all sessions on that interface. Caution: When configuring BFD on VLAN or LAG interfaces on the C-Series, Dell Force10 recommends a minimum value of 500 milliseconds for both the transmit and minimum receive time, which yields a final detection time of (500ms *3) 1500 milliseconds. To change session parameters on an interface: Step 1 Task Change session parameters for all sessions on an interface. Command Syntax bfd interval milliseconds min_rx milliseconds multiplier value role [active | passive] Command Mode INTERFACE VLAN View session parameters using the command show bfd neighbors detail, as shown in the example in Changing physical port session parameters. Disabling BFD for VLANs If BFD is disabled on an interface, sessions on the interface are torn down. A final Admin Down control packet is sent to all neighbors, and sessions on the remote system change to the Down state (Message 3). To disable BFD on a VLAN interface: Step 1 Task Disable all sessions on a VLAN interface. Command Syntax no bfd enable Command Mode INTERFACE VLAN Bidirectional Forwarding Detection | 187