Change Details

MTU calculation in ip6_output() needs to consider the link MTU even if it retrieved a value from the route. It's possible that the link MTU might have been reduced (e.g. by a RA) to a value that is smaller than the value cached in the route.

`ip6_calcmtu()` only looks at the interface MTU if neither the TCP hostcache nor the route provides an MTU. Update the routes so they do not provide stale MTUs.

MTU `ip6_calculation in ip6_output() needs to considmtu()` only looks at the interface MTU if neither the link MTU even if it retrieved a value from the routeTCP hostcache nor the route provides an MTU. It's possible that the link MTU might have been reduced (e.g. by a RA) to a value that is smaller than the value cached in the routeUpdate the routes so they do not provide stale MTUs.