Two or more Peers are are frequently disconnecting and reconnecting from a Cluster

Two or more Peers are are frequently disconnecting and reconnecting from a Cluster

Symptoms:
  1. Two or more Peers are are frequently disconnecting and reconnecting from a Cluster
    1. Peers disappear temporarily from Access page on Coordinator
    2. Only one of the affected Peers appears on the Access page on Coordinator at any time
  2. CPU usage for the sccpd may be unusually high on affected Peers and/or Coordinator
  3. The Cluster page on the Coordinator may not load properly

Cause:
  1. Each Peer needs to have a unique ID.  If two or more Peers try to connect with the same ID, the newer connection will be online and the previous Peer will be disconnected from the Cluster.  The disconnected Peer will usually try to reconnect again.  This results in the affected Peers alternating which is connected at any given moment.
  2. Check if the affected Peers have identical ID strings in /etc/cluster.conf on the Coordinator
  3. This is typically occurs when applying the configuration of a clustered unit onto another unit resulting in the duplicate IDs.

Solution:
  1. Disable Clustering on affected Peers
  2. Verify the affected Peers are no longer listed in /etc/cluster.conf on Coordinator
  3. Run on one Peer to give it a unique identity: uuidgen > /etc/identity
    1. Verify the identities are different on each affected Peer
  4. Reboot the Peer which has the new identity
  5. Re-add each Peer to Cluster
  6. Verify both Peers are Online simultaneously

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