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When adding a route with "mtu lock <mtu>" path MTU discovery (PMTUD) will not be tried and packets will be sent without DF bit set. Upon receiving an ICMP needs frag due to PMTUD, the kernel will not install a cached route and lower the MTU. Signed-off-by: Tim Rozet <trozet@redhat.com>
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This brings in required support for MTU lock. Should be set back to upstream once the following PR merges: vishvananda/netlink#1067 Signed-off-by: Tim Rozet <trozet@redhat.com>
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vishvananda/netlink#1067 is needed to set mtu lock on routes. Signed-off-by: Tim Rozet <trozet@redhat.com>
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vishvananda/netlink#1067 is needed to set mtu lock on routes. Signed-off-by: Tim Rozet <trozet@redhat.com>
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When adding a route with "mtu lock " path MTU discovery (PMTUD) will not be tried and packets will be sent without DF bit set. Upon receiving an ICMP needs frag due to PMTUD, the kernel will not install a cached route and lower the MTU.