SonicWall documents that SonicOS 5.8 and later drops fragmented SIP over UDP, logging 242 Packet dropped - failed processing.
Checked 2026-10-02
- Vendor
- SonicWall
- Product
- SonicOS
- Subsystem
- VoIP inspection
- Deployment
- on-premises
- Region
- not restricted
- Release range
- SonicOS 5.8 and later per 2020 article
- Checked
- 2026-10-02
Sources
- Some or all VoIP (SIP) invites are being dropped due to "242 Packet dropped - failed processing" — SonicWall · tier 2 current vendor documentation · Cause section
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting failed calls caused by large SIP messages over UDP: source note sip-fragmentation-troubleshooting-sonicwall-242-frag-sip. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-fragmentation-troubleshooting-sonicwall-242-frag-sip
BibTeX
@misc{warmtransfer-claim-sip-fragmentation-troubleshooting-sonicwall-242-frag-sip,
title = {Troubleshooting failed calls caused by large SIP messages over UDP: source note sip-fragmentation-troubleshooting-sonicwall-242-frag-sip},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-fragmentation-troubleshooting-sonicwall-242-frag-sip},
note = {Source note sip-fragmentation-troubleshooting-sonicwall-242-frag-sip, checked 2026-10-02}
}