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mlxsw T8878: add noudpcsum vxlan option #2050

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mlxsw T8878: add noudpcsum vxlan option #2050

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7 changes: 7 additions & 0 deletions docs/configuration/interfaces/vxlan.md
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Original file line number Diff line number Diff line change
Expand Up @@ -107,6 +107,13 @@ Disable {abbr}`SLLA (Source Link-Layer Address)` and IP address learning on
the VXLAN interface.
```

```{cfgcmd} set interfaces vxlan \<interface\> parameters noudpcsum

Disable UDP checksums on the VXLAN interface. Some devices include
hardware-accelerated VXLAN offloading and require that VyOS's checksums be
disabled.
```
Comment on lines +110 to +115

@github-actions github-actions Bot May 29, 2026

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WARNING — CLI path not yet present in vyos-1x current

Doc says: set interfaces vxlan <interface> parameters noudpcsum
Source (.vyos-1x/interface-definitions/interfaces_vxlan.xml.in): the parameters node defines external, nolearning, neighbor-suppress, and vni-filter, but no noudpcsum leafNode. A repo-wide grep for noudpcsum / udpcsum in .vyos-1x/ returns zero matches (XML or Python).
Branch: rolling (vyos-1x: current)

The referenced vyos-1x PR vyos/vyos-1x#5201 appears not yet merged into the current branch this docs PR targets. Once that PR merges, this documentation will be accurate. Worth confirming the merge has landed before this docs PR is merged, otherwise the docs will describe a command that does not exist in the running VyOS image.

Minor wording nit: "VyOS's checksums" — these are kernel-generated UDP checksums on VXLAN-encapsulated packets, not something VyOS itself produces. Consider: "…require that UDP checksums on the outer VXLAN packet be disabled."


```{cfgcmd} set interfaces vxlan \<interface\> parameters vni-filter

**Enable** {abbr}`VNI (VXLAN Network Identifier)` **filtering on the VXLAN
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