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Description
- When consecutively running tests that use ip neighbor or IpNeighbor.add, many fail with the error RTNETLINK answers: File exists, leading to AssertionError: Failed to add static arp entries
- This seems to happen when an identical configuration is added, suggesting that previous configuration has not been cleaned up.
- Either IP Neighbor cleanup is not working properly, or 'add' calls could be changed out for 'replace', which overrides previous config without failing.
Tests affected:
test_ipv4_replace_dyn_stat_arp
test_ipv4_static_route_over_static_arp
test_ecmp_nexthops_down[3]
test_ecmp_traffic_distribution[basic]
test_ecmp_distribution_lags
test_hw_drop_l3[3]
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