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d1ae37dc68
Without the previous commit, TCP failed to switch to alternative IPv6 routes immediately upon carrier loss. It would persist with the dead route until reaching the threshold net.ipv4.tcp_retries1, leading to unnecessary delays in failover. Let's add a selftest for this scenario to ensure TCP fails over immediately upon a carrier loss event. Before: TEST: TCP IPv4 failover [ OK ] TEST: TCP IPv6 failover [FAIL] After: TEST: TCP IPv4 failover [ OK ] TEST: TCP IPv6 failover [ OK ] Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com> Signed-off-by: Sagarika Sharma <sharmasagarika@google.com> Link: https://patch.msgid.link/20260430200909.527827-3-sharmasagarika@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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