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Running tcpdump on kni interfaces brings BGP sessions down #570

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andrenth opened this issue Jun 21, 2022 · 2 comments
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Running tcpdump on kni interfaces brings BGP sessions down #570

andrenth opened this issue Jun 21, 2022 · 2 comments
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Operational demand This issue would make Gatekeeper safer and/or cheaper to operate
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Version 1.2

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@andrenth
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When I run tcpdump on one of the KNI interfaces used by Gatekeeper, it immediately brings down BGP sessions running on the respective interfaces (the connection state in Bird changes to "Neighbor lost").

There are no correlated errors that I could find. ifconfig and ethtool outputs don't change during the tcpdump execution. There are no Gatekeeper logs, and the only kernel messages are the ones indicating the interfaces entered or left promiscuous mode.

Once tcpdump is stopped, the session is restablished via BGP's retry mechanisms.
@AltraMayor AltraMayor added the Operational demand This issue would make Gatekeeper safer and/or cheaper to operate label Jun 21, 2022
@AltraMayor AltraMayor added this to the Version 1.2 milestone Jun 21, 2022
@AltraMayor
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Once this issue is taken back again, verify if pull request #623 solved this issue by ignoring requests to set promiscuous mode.

@AltraMayor AltraMayor mentioned this issue Jan 30, 2024
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AltraMayor added a commit that referenced this issue Mar 1, 2024
@AltraMayor
cps: replace DPDK's KNI library with virtio-user
f23b7ef 
DPDK dropped its KNI library at version 23.11.
This commit replaces DPDK's KNI library with virtio-user.

This commit closes #481, closes #570, closes #585, closes #674.
AltraMayor added a commit that referenced this issue Mar 1, 2024
@AltraMayor
cps: replace DPDK's KNI library with virtio-user
53e42db 
DPDK dropped its KNI library at version 23.11.
This commit replaces DPDK's KNI library with virtio-user.

This commit closes #481, closes #570, closes #585, closes #674.
@AltraMayor
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Pull request #678 replaced DPDK's KNI library with virtio-user, and virtio-user does not have this problem.

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Operational demand This issue would make Gatekeeper safer and/or cheaper to operate
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Version 1.2
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@andrenth @AltraMayor