<dd> The transmission interval of CFM heartbeats in milliseconds.
Three missed heartbeat receptions indicate a connectivity fault.
Defaults to 1000ms. </dd>
+ <dt><code>cfm_extended</code></dt>
+ <dd> When true, the CFM module operates in extended mode. This causes
+ it to use a nonstandard destination address to avoid conflicting
+ with compliant implementations which may be running concurrently on
+ the network. Defaults to false. </dd>
<dt><code>bond-stable-id</code></dt>
<dd> A positive integer using in <code>stable</code> bond mode to
make slave selection decisions. Allocating