Prevent DHCPv6 and ICMPv6 control packets from affecting idle timeouts

You can use the terminating filter action exclude-accounting to exclude all DHCPv6 and ICMPv6 control traffic from being considered for idle-timeout detection for tunneled subscribers at the LAC. Include this term at the [edit firewall family inet6 filter filter-name term term-name then] hierarchy level. Apply the filter in the dynamic profile as an input and output filter. In earlier releases, DHCPv6 and ICMPv6 control traffic prevents the idle timeout from ever expiring, leading to incorrect detection of idle periods. When connections are charged based on the time the call is connected, this can result in high call charges.