iSCSI session already exists - warning

JMPNETAPP — Thu, 05 Jun 2025 05:34:07 GMT

I receive the following syslog warning message about every 5 mins. This occurs for multiple IP connected iSCSI sessions. We do utilize MPIO in our environment. Our hosts are running WinSrv 2012 and are configured with two Broadcom 57810 SFP+ NICs. NIC team has been created using at least on of the interfaces from each card. NIC team is set as LACP with Hyper-V Port for load balancing. NetApp MPIO DSM has been installed on hosts as well. Hosts connect from 2 different NIC teams via iSCSI to multiple vFiler units (basically two IPs using 4 physical interfaces from the host to one iSCSI target portal address). Vfiler interfaces have been created from an interface group using e1a and e1b on the filer (FAS2240). Filer is currently running Data ONTAP version is 8.2P3.

Mon Jun 23 18:43:46 GMT [sys_mgmt_01@A-DEV-FAS-01:iscsi.warning:warning]: ISCSI: New session request from initiator iqn.1991-05.com.microsoft:at-mgmt-02.domain.dev, a session from this initiator already exists.

Has anyone seen this or know how to correct the issue if needed? Or can it be safely ignored?

Re: iSCSI session already exists - warning

deepuj — Tue, 24 Jun 2014 06:54:45 GMT

Hi,

looks like host is trying to re-log in , check for MTU size conflict on all adapters including hosts, switches and storage controller

Thanks

Re: iSCSI session already exists - warning

JMPNETAPP — Tue, 24 Jun 2014 15:45:07 GMT

deepuj, thanks for your reply.

Our Cisco 5548 switches are configured with MTU @ 9216, FAS2240 MTU @ 9000 and Hosts are set with MTU @ 9014.

Any ideas?

Thanks,

topic iSCSI session already exists - warning in Network and Storage Protocols

iSCSI session already exists - warning

Re: iSCSI session already exists - warning

Re: iSCSI session already exists - warning