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Cisco Bug: CSCur21953 - App fault when using IPv6 only interfaces and joining a cluster via SSH

Last Modified

Nov 27, 2020

Products (1)

  • Cisco IronPort Email Security Appliance Software

Known Affected Releases

13.5.1-084 8.0.1-023 8.5.6-074

Description (partial)

When attempting to join a cluster using the 'clusterconfig' command, you may encounter the following error:

Failed to join the cluster.
Error was: '(\'egg/ _cluster_make_auto_invdef|3950\', "<type \'exceptions.KeyError\'>", "\'ip\'", \'[egg/ _clusterjoin_batch|5746] [egg/

In order for this error to occur, the following conditions must be met on the ESA that is joining the cluster:

1) The ESA has an IP interface with only an IPv6 address configured (no IPv4 address)
2) That interface is alphabetically above the IP interface that the appliance is connecting from

Additionally, the cluster you are joining must be configured to communicate by IP address (See CLI: clusterconfig -> communication)
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