selftests: pmtu: Add test_pmtu_vti4_exception test

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This test checks that PMTU exceptions are created only when
needed on IPv4 routes with vti and xfrm, and their PMTU value is
checked as well.

We can't adopt the same approach as test_pmtu_vti6_exception()
here, because on IPv4 administrative MTU changes won't be
reflected directly on PMTU.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Stefano Brivio 2018-03-17 02:31:44 +01:00 • committed by David S. Miller

parent 35b49424b8

commit 5e84430bb8

1 changed files with 70 additions and 10 deletions

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tools/testing/selftests/net/pmtu.sh

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