This requirement is not applicable for the DODIN Backbone. Review the router configuration and determine if filters are bound to the applicable interfaces to drop all inbound IPv6 packets containing an undefined option type value regardless of whether they appear in a Hop-by-Hop or Destination Option header. Undefined values are 0x02, 0x03, 0x06, 0x9 – 0xE, 0x10 – 0x22, 0x24, 0x25, 0x27 – 0x2F, and 0x31 – 0xFF. The following example will block any inbound IPv6 packet containing either a Hop-by-Hop or Destination Option header: family inet6 { filter IPV6-INGRESS-FILTER { term HOP_BY_HOP_HEADER { from { next-header hop-by-hop; } then { syslog; discard; } } term DEST_ OPT_HEADER { from { next-header dstops; } then { syslog; discard; } } term ALLOW_TCP_ESTABLISHED { from { next-header tcp; tcp-established; } then accept; } term DENY_BY_DEFAULT { then { syslog; discard; } } } } } Note: Currently JUNOS has no method to filter option type within either Hop-by-Hop or Destination Option header. Hence, all packets with a Hop-by-Hop or Destination Option headers must be dropped. If the router is not configured to drop IPv6 packets containing a Hop-by-Hop or Destination Option extension header with an undefined option type, this is a finding.