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pmanak
Staff & Editor
Staff & Editor
April 6, 2026

Technical Tip: VXLAN over IPsec VPN NP7Lite processor offloading issue

  • April 6, 2026
  • 0 replies
  • 406 views
Description This article describes an issue where VXLAN traffic over IPsec VPN cannot be offloaded by FortiGate firewalls with NP7Lite processors.
Scope FortiGate with NP7Lite processor.
Solution

FortiGate firewalls with NP7lite processors are unable to offload the VXLAN traffic over IPsec VPN. This can be confirmed by running the #diagnose sys session list command and checking the ofld_fail_reason field.

 

session info: proto=6 proto_state=01 duration=2 expire=3597 timeout=3600 refresh_dir=both flags=00000000 socktype=0 sockport=0 av_idx=0 use=3
origin-shaper=
reply-shaper=
per_ip_shaper=
class_id=0 ha_id=0 policy_dir=0 tunnel=/ vlan_cos=0/255
state=may_dirty npu
statistic(bytes/packets/allow_err): org=349/5/1 reply=22713/18/1 tuples=2
tx speed(Bps/kbps): 0/0 rx speed(Bps/kbps): 0/0
orgin->sink: org pre->post, reply pre->post dev=41->42/42->41 gwy=1.1.2.2/0.0.0.0
hook=pre dir=org act=noop 1.1.1.1:60318->2.2.2.2:80(0.0.0.0:0)
hook=post dir=reply act=noop 2.2.2.2:80->1.1.1.1:60318(0.0.0.0:0)
pos/(before,after) 0/(0,0), 0/(0,0)
src_mac=6e:55:50:3e:02:f9
misc=0 policy_id=10 pol_uuid_idx=1014 auth_info=0 chk_client_info=0 vd=5
serial=00000ec4 tos=ff/ff app_list=0 app=0 url_cat=0
rpdb_link_id=00000000 ngfwid=n/a
npu_state=0x000400 ofld-O
npu info: flag=0x81/0x81, offload=9/0, ips_offload=0/0, epid=20/0, ipid=6/6, vlan=0x05ab/0x05aa
vlifid=6/0, vtag_in=0x05ab/0x0000 in_npu=1/0, out_npu=1/0, fwd_en=0/0, qid=7/0, ha_divert=0/0
no_ofld_reason:
ofld_fail_reason(kernel, drv): none/none, none(0)/VXLAN-ib-not-offloaded(9)
npu_state_err=00/00

 

The issue is currently under investigation and will be resolved in an upcoming firmware version.

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