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FTOS Configuration Guide for the C-Series - Force10 Networks

FTOS Configuration Guide for the C-Series - Force10 Networks

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View <strong>the</strong> established sessions using <strong>the</strong> command show bfd neighbors, as shown in Figure 437.<br />

Figure 437 Viewing Established Sessions <strong>for</strong> VLAN Neighbors<br />

R2(conf-if-vl-200)#bfd neighbor 2.2.3.2<br />

R2(conf-if-vl-200)#do show bfd neighbors<br />

* - Active session role<br />

Ad Dn - Admin Down<br />

C - CLI<br />

I - ISIS<br />

O - OSPF<br />

R - Static Route (RTM)<br />

V - VRRP<br />

Changing 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 a configuration change is made, <strong>the</strong> change affects all<br />

sessions on 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 an 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> VLANs<br />

VLAN BFD Sessions Enabled<br />

LocalAddr RemoteAddr Interface State Rx-int Tx-int Mult Clients<br />

* 2.2.3.2 2.2.3.1 Vl 200 Up 100 100 3 C<br />

bfd interval milliseconds min_rx<br />

milliseconds multiplier value role [active |<br />

passive]<br />

INTERFACE VLAN<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 change to <strong>the</strong> Down state (Message 26<br />

on page 607).<br />

<strong>FTOS</strong> <strong>Configuration</strong> <strong>Guide</strong>, version 7.7.1.0 621

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