+Version 1.6.4 (2018-03-22)
+ o Basic VRF support
+ o Simplified autoconf scripts
+ o BGP: Shutdown communication (RFC 8203)
+ o BGP: Allow exchanging LOCAL_PREF with eBGP peers
+ o BGP: Allow to specify interface for regular sessions
+ o BGP: New option 'disable after cease'
+ o RAdv: Support for more specific routes (RFC 4191)
+ o RAdv: Proper handling of prefix retraction
+ o Filter: Allow silent filter execution
+ o Filter: Fixed stack overflow in BGP mask expressions.
+ o Several bug fixes
+
+Version 1.6.3 (2016-12-21)
+ o Large BGP communities
+ o BFD authentication (MD5, SHA1)
+ o SHA1 and SHA2 authentication for RIP and OSPF
+ o Improved documentation
+ o Several bug fixes
+
+Version 1.6.2 (2016-09-29)
+ o Fixes serious bug introduced in the previous version
+
Version 1.6.1 (2016-09-22)
o Support for IPv6 ECMP
o Better handling of IPv6 tentative addresses