Fortinet states NP7 IP reassembly handles packets fragmented into at most two pieces; for three or more fragments NTurbo must be disabled.
Checked 2026-10-02
- Vendor
- Fortinet
- Product
- FortiGate
- Subsystem
- NP7 offload
- Deployment
- on-premises
- Region
- not restricted
- Release range
- NP7 models as of 2024-05-15 article
- Checked
- 2026-10-02
Sources
- Technical Tip: How to Identify UDP NTurbo fragmentation drops and how to resolve them on NP7 FortiGates — Fortinet · tier 2 current vendor documentation · Limitations note
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting failed calls caused by large SIP messages over UDP: source note sip-fragmentation-troubleshooting-fortinet-reassembly-2-frags. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-fragmentation-troubleshooting-fortinet-reassembly-2-frags
BibTeX
@misc{warmtransfer-claim-sip-fragmentation-troubleshooting-fortinet-reassembly-2-frags,
title = {Troubleshooting failed calls caused by large SIP messages over UDP: source note sip-fragmentation-troubleshooting-fortinet-reassembly-2-frags},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-fragmentation-troubleshooting-fortinet-reassembly-2-frags},
note = {Source note sip-fragmentation-troubleshooting-fortinet-reassembly-2-frags, checked 2026-10-02}
}