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

bhartm62 — Wed, 13 Apr 2016 11:45:11 GMT

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

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

Nick_Dyer — Wed, 13 Apr 2016 19:05:31 GMT

Hello Benedict,

The current portal is the connection the iSCSI is bound across at that time. The persistent portal is the address returned as part of an iSCSI discovery command; typically I believe it would be the discovery IP address.

topic Re: What is the Difference between iSCSI Current Portal and Persistent Portal? in Array Setup and Networking

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

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