ISCSI: iswtu_evr: unexpected event id 185 reported

OMAYURCHENKO — Thu, 05 Jun 2025 05:37:16 GMT

Hi guys.

I try present LUN to Windows 2012 via iSCSI and recieve error:

Logs of FAS2040 confirm it:

[fas2040a:iscsi.warning:warning]: ISCSI: iswtu_evr: unexpected event id 185 reported

Mon Apr 28 04:52:39 GMT [fas2040a:iscsi.notice:notice]: ISCSI: New session from initiator iqn.1991-05.com.microsoft:srv-mxntap01.*.tst at IP addr 10.*.*.119

Mon Apr 28 04:53:37 GMT [fas2040a:iscsi.notice:notice]: ISCSI: Initiator (iqn.1991-05.com.microsoft:srv-mxntap01.ntap.tst) sent LUN Reset request, aborting all

Can somebody help me with troubleshooting this problem?

Re: ISCSI: iswtu_evr: unexpected event id 185 reported

OMAYURCHENKO — Tue, 29 Apr 2014 05:16:40 GMT

I found solution by myself. What I did:

1. Install wireshark on server and checktraffic between server and fas2040.

2. Found a problem with segmentation TCP/IP packet.

3. Check MTU size.

fas2040 - 9000

server (both NICs) - 9000

4. I didn`t have access to managment of switch and didn`t have opportunity check MTU size on switch.

5. Reconfigure MTU on both sides to 1500 (I know that need 9000, both this just demo)

After it everything work correct.

topic ISCSI: iswtu_evr: unexpected event id 185 reported in Network and Storage Protocols

ISCSI: iswtu_evr: unexpected event id 185 reported

Re: ISCSI: iswtu_evr: unexpected event id 185 reported