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Environment:
- CentOS 7 with kernel 3.10.0-1062.18.1.el7.x86_64
- targetcli version 2.1.fb49
- isc-dhcpd-4.2.5
- iPXE version 1.20.1+ and 1.0.0+

I have a CentOS 7 server which can serve Window 10 boot over iSCSI with on-board 1G ethernet port and It worked very well. After installing SFP+ 10G card on the server, everything looks fine but iPXE sanboot delays about 1 minute and the server's targetcli log shows the error message, "Did not receive response to NOPIN on CID: 0, failing connection for I_T Nexus ,i,0x400027237473,,t,0x01".

I can't see any information about the error message. Could you explain what it means and how to resolve it?

sohnman
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  • This kind of thing could be an MTU problem. When you went to 10G Ethernet, did your host end up on a different subnet that was configured for jumbo frames? – Mike Andrews Apr 06 '20 at 17:03
  • @MikeAndrews No. I did not configured anything for jumbo frames.('ip link' tells MTU is 1500 for 10G NIC.) FYI, the switch is a unmanaged one. And all clients and server are in the same LAN. – sohnman Apr 07 '20 at 08:40
  • @sohnman Did you ever figure this out? – Dids Jul 07 '21 at 06:35
  • As mentioned this sounds like a packet issue, best is to use tcpdump or wireshark to try and figure out what is going on at the wire. Also full output of `ifstat` and details of which iPXE binary is used could help (maybe it is a NIC driver issue, but no way to tell without more info) iPXE could also be built with DEBUG=iscsi enabled, but tcpdumps are usually more useful in cases of iSCSI issues. – NiKiZe Jul 29 '21 at 15:17

0 Answers0