[strongSwan] Backupserver attribute in strongswan unity plugin

sivaprasad at freescale.com sivaprasad at freescale.com
Thu May 7 12:26:45 CEST 2015

Hi all,

I am working in VPN client-server mode (using strongswan 5.2.1 on both DUT which are acting as gateways) where client requests a virtual ip, and server responds.
Options like , split-tunnel and dns are supported as expected

I noticed that I can use backupserver( when server is down, client tries to establish tunnel with backup server) option by configuring in /etc/strongswan.d/charon/attr.conf  as
28681 =,

Log says
"loaded attribute UNITY_BACKUP_SERVERS: c8:c8:c8:19"
"processing UNITY_BACKUP_SERVERS attribute"
"handling UNITY_BACKUP_SERVERS attribute failed "

Does it suggest that strongswan unity plugin will not support backupserver option?  or Do we need to do any further configuration on client or  server side  for it to support ?

Siva Prasad

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