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Configure more aggressive timeouts on non-ESTABLISHED TCP flow entries#985

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FelixMcFelix wants to merge 3 commits intomasterfrom
faster-syn-expiry
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Configure more aggressive timeouts on non-ESTABLISHED TCP flow entries#985
FelixMcFelix wants to merge 3 commits intomasterfrom
faster-syn-expiry

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@FelixMcFelix FelixMcFelix commented May 7, 2026

This PR cuts down the TCP state entry expiry times for TCP flow entries which are either still within the three-way handshake or are actively being torn down. This does not affect the validity of any LFT entries which are responsible for actually procesing matched packets -- these exist on their own 60s expiry cadence.

This might have some impact on flow stat tracking for one or two packets, but the correct fix there is to get #744 over the line.

Should answer for
https://github.com/oxidecomputer/customer-support/issues/1125.

This PR cuts down the TCP state entry expiry times for TCP flow entries
which are either still within the three-way handshake or are actively
being torn down. This does not affect the validity of any LFT entries
which are responsible for actually *procesing* matched packets -- these
exist on their own 60s expiry cadence.

This might have some impact on flow state tracking, but the correct fix
there is to get #744 over the
line.

Should answer for
oxidecomputer/customer-support#1125.
@AlejandroME AlejandroME added this to the 19 milestone May 7, 2026
@FelixMcFelix FelixMcFelix marked this pull request as ready for review May 7, 2026 14:28
@twinfees twinfees added the customer For any bug reports or feature requests tied to customer requests label May 7, 2026
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