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FTOS Configuration Guide for the C-Series - Force10 Networks

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Changing port-channel session parameters<br />

BFD sessions are configured with default intervals and a default role. The parameters that can be<br />

configured are: Desired TX Interval, Required Min RX Interval, Detection Multiplier, and system role.<br />

These parameters are configured per interface; if you change a parameter, <strong>the</strong> change affects all sessions on<br />

that interface.<br />

Caution: When configuring BFD on VLAN or LAG interfaces on <strong>the</strong> C-<strong>Series</strong>, <strong>Force10</strong> recommends a<br />

minimum value of 500 milliseconds <strong>for</strong> both <strong>the</strong> transmit and minimum receive time, which yeilds a final<br />

detection time of (500ms *3) 1500 milliseconds.<br />

To change session parameters on an interface:<br />

Step Task Command Syntax Command Mode<br />

1 Change session parameters <strong>for</strong><br />

all sessions on a port-channel<br />

interface.<br />

View session parameters using <strong>the</strong> command show bfd neighbors detail, as shown in Figure 426 on<br />

page 607.<br />

Disabling BFD <strong>for</strong> port-channels<br />

If BFD is disabled on an interface, sessions on <strong>the</strong> interface are torn down. A final Admin Down control<br />

packet is sent to all neighbors, and sessions on <strong>the</strong> remote system are placed in a Down state (Message 26<br />

on page 607).<br />

To disable BFD <strong>for</strong> a port-channel:<br />

Configuring Protocol Liveness<br />

Protocol Liveness is supported only on plat<strong>for</strong>m: e<br />

bfd interval milliseconds min_rx<br />

milliseconds multiplier value role [active |<br />

passive]<br />

Step Task Command Syntax Command Mode<br />

INTERFACE<br />

PORT-CHANNEL<br />

1 Disable BFD <strong>for</strong> a port-channel. no bfd enable INTERFACE PORT-CHANNEL<br />

Protocol Liveness is a feature that notifies <strong>the</strong> BFD Manager when a client protocol is disabled. When a<br />

client is disabled, all BFD sessions <strong>for</strong> that protocol are torn down. Neighbors on <strong>the</strong> remote system<br />

receive an Admin Down control packet and are placed in <strong>the</strong> Down state (Message 26 on page 607).<br />

624 Bidirectional Forwarding Detection

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