On 3/2/18 8:36 AM, Stefano Brivio wrote: > Currently, administrative MTU changes on a given netdevice are > not reflected on route exceptions for MTU-less routes, with a > set PMTU value, for that device: > > # ip -6 route get 3000::b > 3000::b from :: dev vti_a proto kernel src 3000::a metric 256 pref medium > # ping6 -c 1 -q -s10000 3000::b > /dev/null > # ip netns exec a ip -6 route get 3000::b > 3000::b from :: dev vti_a src 3000::a metric 0 > cache expires 571sec mtu 4926 pref medium > # ip link set dev vti_a mtu 3000 > # ip -6 route get 3000::b > 3000::b from :: dev vti_a src 3000::a metric 0 > cache expires 571sec mtu 4926 pref medium > # ip link set dev vti_a mtu 9000 > # ip -6 route get 3000::b > 3000::b from :: dev vti_a src 3000::a metric 0 > cache expires 571sec mtu 4926 pref medium
Addresses in the 2001:db8: range should be used for commit messages. And please codify the above expectation as a test under tools/testing/selftests/net
