久しぶりに SA が出てます。
IPv6 provides a routing header option which allows a packet sender to
indicate how the packet should be routed, overriding the routing knowledge
present in a network. This functionality is roughly equivalent to the
"source routing" option in IPv4. All nodes in an IPv6 network -- both
routers and hosts -- are required by RFC 2640 to process such headers.
II. Problem Description
There is no mechanism for preventing IPv6 routing headers from being used
to route packets over the same link(s) many times.
No workaround is available.IPv6 Routing Header 0 is dangerous