other important configurations:

- /etc/iscsi/iscsid.conf
other than chap config parameters

diff iscsid.conf iscsid.conf.orig
< #node.session.timeo.replacement_timeout = 120
< node.session.timeo.replacement_timeout = 15
---
> node.session.timeo.replacement_timeout = 120
130,131c125
< #node.session.err_timeo.lu_reset_timeout = 30
< node.session.err_timeo.lu_reset_timeout = 20
---
> node.session.err_timeo.lu_reset_timeout = 30
168,169c162
< # node.session.initial_login_retry_max = 8
< node.session.initial_login_retry_max = 12
---
> node.session.initial_login_retry_max = 8
178,179c171
< #node.session.cmds_max = 128
< node.session.cmds_max = 1024
---
> node.session.cmds_max = 128
183,184c175
< #node.session.queue_depth = 32
< node.session.queue_depth = 128
---
> node.session.queue_depth = 32
310,311c301
< #node.session.iscsi.FastAbort = Yes
< node.session.iscsi.FastAbort = No
---
> node.session.iscsi.FastAbort = Yes


- network adapters dedicated to iSCSI config files
they are 10Gb/s interfaces
(
lspci gives
05:00.0 Ethernet controller: Intel Corporation 82599 10 Gigabit Dual Port Backplane Connection (rev 01)
)
/etc/sysconfig/network-scripts/ifcfg-eth4
DEVICE=eth4
BOOTPROTO=static
HWADDR=XX:XX:XX:XX:XX:XX
ONBOOT=yes
IPADDR=10.10.100.227
NETMASK=255.255.255.0
TYPE=Ethernet
MTU=9000

similar for eth5 (ip is 10.10.100.227)

ifup eth4
ifup eth5

- /etc/sysctl.conf
net.ipv4.conf.eth4.arp_announce=2
net.ipv4.conf.eth4.arp_ignore=1
net.ipv4.conf.eth4.arp_filter=2
#
net.ipv4.conf.eth5.arp_announce=2
net.ipv4.conf.eth5.arp_ignore=1
net.ipv4.conf.eth5.arp_filter=2

to acquire modification:
sysctl -p

Verify ping to the portal (10.10.100.7) from both interfaces
ping -I eth4 10.10.100.7
ping -I eth5 10.10.100.7

to verify jumbo frame connections (if configured, as in my case):
ping 10.10.100.7 -M do -s 8792 -I eth4
ping 10.10.100.7 -M do -s 8792 -I eth5


- configuration of the iscsi interfaces
iscsiadm -m iface -I ieth4 --op=new
iscsiadm -m iface -I ieth5 --op=new
iscsiadm -m iface -I ieth4 --op=update -n iface.hwaddress -v XX:XX:XX:XX:XX:XX
iscsiadm -m iface -I ieth5 --op=update -n iface.hwaddress -v YY:YY:YY:YY:YY:YY


output of some commands with this config

# iscsiadm -m session | grep mylun
tcp: [3] 10.10.100.7:3260,1 iqn.2001-05.com.equallogic:0-xxxxxxxx-mylun (non-flash)
tcp: [4] 10.10.100.7:3260,1 iqn.2001-05.com.equallogic:0-xxxxxxxx-mylun (non-flash)

with "-P 1" option

Target: iqn.2001-05.com.equallogic:0-xxxxxxxx-mylun (non-flash)
        Current Portal: 10.10.100.38:3260,1
        Persistent Portal: 10.10.100.7:3260,1
                **********
                Interface:
                **********
                Iface Name: ieth5
                Iface Transport: tcp
                Iface Initiatorname: iqn.1994-05.com.redhat:aea9b71a9aaf
                Iface IPaddress: 10.10.100.228
                Iface HWaddress: <empty>
                Iface Netdev: eth5
                SID: 3
                iSCSI Connection State: LOGGED IN
                iSCSI Session State: LOGGED_IN
                Internal iscsid Session State: NO CHANGE
        Current Portal: 10.10.100.37:3260,1
        Persistent Portal: 10.10.100.7:3260,1
                **********
                Interface:
                **********
                Iface Name: ieth4
                Iface Transport: tcp
                Iface Initiatorname: iqn.1994-05.com.redhat:aea9b71a9aaf
                Iface IPaddress: 10.10.100.227
                Iface HWaddress: <empty>
                Iface Netdev: eth4
                SID: 4
                iSCSI Connection State: LOGGED IN
                iSCSI Session State: LOGGED_IN
                Internal iscsid Session State: NO CHANGE

# multipath -l mympfriendlyname
mympfriendlyname (one_of_my_luns_wwid) dm-6 EQLOGIC,100E-00
size=30G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=0 status=active
  |- 12:0:0:0 sdf 8:80  active undef running
  `- 13:0:0:0 sdg 8:96  active undef running

HIH discussion,

Gianluca