iscsiadm do not allow to discovery the same LUN with second NIC

Issue

• iscsiadm do not allow to discovery the same LUN with a second NIC when using multipath, as described in the tentative bellow:

  # iscsiadm --mode iface --op=new --interface iscsi-0
  # iscsiadm --mode iface --op=new --interface iscsi-1
  
  # iscsiadm --mode iface --op=update --interface iscsi-0 --name=iface.net_ifacename --value=eth0
  # iscsiadm --mode iface --op=update --interface iscsi-1 --name=iface.net_ifacename --value=eth1
  

  • Discovery using first NIC works properly:

  # iscsiadm -m discovery -t st -p 172.17.50.10 -I iscsi-0
  172.17.50.10:3260,1 iqn.2012-08.com.example:test:10000:test5
  

  • But when try with the second NIC, the following error appears:

  # iscsiadm -m discovery -t st -p 172.17.50.10 -I iscsi-1
  iscsiadm: cannot make connection to 172.17.50.10: Connection timed out
  iscsiadm: cannot make connection to 172.17.50.10: Connection timed out
  iscsiadm: cannot make connection to 172.17.50.10: Connection timed out
  iscsiadm: cannot make connection to 172.17.50.10: Connection timed out
  iscsiadm: cannot make connection to 172.17.50.10: Connection timed out
  iscsiadm: cannot make connection to 172.17.50.10: Connection timed out
  iscsiadm: connection login retries (reopen_max) 5 exceeded
  iscsiadm: No portals found
  

• The same behavior occurs if I change the interface order (tried interface iscsi-1 first and iscsi-0 second), the first discovery happens successfully and the second shows the same problem. How to fix it?