1 Reply Latest reply: Apr 13, 2016 12:05 PM by Nick Dyer RSS

    What is the Difference between iSCSI Current Portal and Persistent Portal?

    Benedict Hartmann Wayfarer

      When I have two iscsi sessions on a server connected I get the following output. What is the difference between Current and Persistent Portal in iSCSI? The reason I ask this is because I want to understand what happens when the connection to one Current Portal gets interrupted. How comes the Persistent Portal into play? And answer or point to some docu would be very much apprechiated

       

      # netstat -putan | grep iscsi

      tcp        0      0 10.5.11.249:58867       10.5.10.15:3260         ESTABLISHED 2503/iscsid    

      tcp        0      0 10.5.9.249:38582        10.5.8.15:3260          ESTABLISHED 2503/iscsid

       

      # iscsiadm -m session -P 1

      Target: iqn.2007-11.com.nimblestorage:l-nas-003-iotest-lun-v42c28ab7ea0497e6.0000000b.a8c61d51

        Current Portal: 10.5.10.15:3260,2460

        Persistent Portal: 10.5.10.14:3260,2460

        **********

        Interface:

        **********

        Iface Name: default

        Iface Transport: tcp

        Iface Initiatorname: iqn.1993-08.org.debian:01:a3d2b8841b8d

        Iface IPaddress: 10.5.11.249

        Iface HWaddress: <empty>

        Iface Netdev: <empty>

        SID: 3

        iSCSI Connection State: LOGGED IN

        iSCSI Session State: LOGGED_IN

        Internal iscsid Session State: NO CHANGE

        Current Portal: 10.5.8.15:3260,2460

        Persistent Portal: 10.5.8.14:3260,2460

        **********

        Interface:

        **********

        Iface Name: default

        Iface Transport: tcp

        Iface Initiatorname: iqn.1993-08.org.debian:01:a3d2b8841b8d

        Iface IPaddress: 10.5.9.249

        Iface HWaddress: <empty>

        Iface Netdev: <empty>

        SID: 4

        iSCSI Connection State: LOGGED IN

        iSCSI Session State: LOGGED_IN

        Internal iscsid Session State: NO CHANGE