[BPF] allow UDP gso packets to nodeport tunnel #11653
Open
+6
−6
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
UDP protocols like QUIC make use UDP_SEGMENT to send large datagrams that the stack segments to avoid fragmentation. Without this change we would only send back an ICMP packet to big to reduce MTU which would not have any effect the the packet would be treated like lost and performance dramatically drops. With this change we can encap UDP gso packets into the VXLAN tunnel when traffic is forwarded from one node to another.
marvin-tigera
added
release-note-required
sridhartigera
approved these changes
Jan 13, 2026
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
UDP protocols like QUIC make use UDP_SEGMENT to send large datagrams that the stack segments to avoid fragmentation. Without this change we would only send back an ICMP packet to big to reduce MTU which would not have any effect the the packet would be treated like lost and performance dramatically drops.
With this change we can encap UDP gso packets into the VXLAN tunnel when traffic is forwarded from one node to another.
Description
Related issues/PRs
fixes #11367
Todos
Release Note
Reminder for the reviewer
Make sure that this PR has the correct labels and milestone set.
Every PR needs one
docs-*label.docs-pr-required: This change requires a change to the documentation that has not been completed yet.docs-completed: This change has all necessary documentation completed.docs-not-required: This change has no user-facing impact and requires no docs.Every PR needs one
release-note-*label.release-note-required: This PR has user-facing changes. Most PRs should have this label.release-note-not-required: This PR has no user-facing changes.Other optional labels:
cherry-pick-candidate: This PR should be cherry-picked to an earlier release. For bug fixes only.needs-operator-pr: This PR is related to install and requires a corresponding change to the operator.