title: Understanding ntpq output - both servers with x
body: <p>One my servers I am getting an &quot;x&quot; beside NTP server IP in the &quot;ntpq -p&quot; output.
  From what I read this means &quot;discarded by intersection algorithm&quot; but I still cannot understand what is wrong. Normally I have one server with a * and the other with a +</p>
  <p>Any idea what that &quot;x&quot; indicates and how can I resolve the issue? (Nodes are triggering an alarm that NTP is not in sync).
  I can understand that 10.x.x.10 has a high offset, but I think 10.x.x.20 should be fine and should be used by the servers.</p>
  <pre><code>**Server A**
  ntpq -p
       remote           refid      st t when poll reach   delay   offset  jitter
  ==============================================================================
  x10.x.x.10     LOCAL(0)        13 u  486 1024  377    0.470  -129.52  19.225
  x10.x.x.20     .PPS.            1 u  210 1024  377    0.287   -2.617   1.055
  
  **Server B**
  ntpq -p
       remote           refid      st t when poll reach   delay   offset  jitter
  ==============================================================================
  x10.x.x.10     LOCAL(0)        13 u  413 1024  377    0.400  -116.26  23.672
  x10.x.x.20     .PPS.            1 u  977 1024  377    0.641   -0.327   1.455
  </code></pre>