LiveKit experienced a minor incident on September 22, 2025 affecting Global SIP, lasting 3h 17m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Sep 22, 2025, 08:13 AM UTC
We are currently investigating reports of SIP calls into EU region not working
- identified Sep 22, 2025, 09:53 AM UTC
The issue has been identified and a fix is being implemented.
- identified Sep 22, 2025, 10:30 AM UTC
The fix has been deployed to all regions.
- monitoring Sep 22, 2025, 11:07 AM UTC
A fix has been implemented and we are monitoring the results.
- resolved Sep 22, 2025, 11:30 AM UTC
The incident is resolved.
- postmortem Sep 23, 2025, 04:35 AM UTC
On Friday, Sep 19, 2025 at 11.21pm UTC, we rolled out a change to our SIP gateway servers that reduced the allowed MTU size for incoming packets to 1500 bytes. While this did not affect all calls, 5% of calls where INVITE messages exceeded the SIP mandated MTU size of 1500 got dropped. These may have appeared like network issues to any affected users. The fix was to increase the MTU size limit on the SIP gateway and this resolved the issue. To prevent similar incidents in the future, we have already added to both our monitoring and our release verification suite to cover this case.