17 Dell Compellent Using Storage Center with FCoE and Linux
# cat ifcfg-eth1.10
DEVICE="eth1.10"
ONBOOT="yes"
BOOTPROTO=static
IPADDR=10.10.26.95
NETMASK=255.255.0.0
MTU=9000
VLAN=yes
Once the interfaces have been enabled, jumbo frames connectivity can be confirmed by sending large
packet pings to another jumbo frame enabled host on the network.
# ping -M do -s 8972 10.10.26.151
PING 10.10.26.151 (10.10.26.151) 8972(9000) bytes of data.
8980 bytes from 10.10.26.151: icmp_seq=1 ttl=64 time=0.137 ms
8980 bytes from 10.10.26.151: icmp_seq=2 ttl=64 time=0.129 ms
Once healthy connectivity has been confirmed, the process of configuring iSCSI can begin. In this
example “/etc/iscsi/iscsid.conf” will be edited to change the value of “node.session.queue_depth” from
“32” to “64” in an attempt to increase throughput.
The process of configuring the iSCSI targets begins with iSCSI discovering available targets on the Storage
Center and logging into those targets addresses. It should be noted that the Storage Center being targeted
by iSCSI is an entirely separate Storage Center from the Storage Center providing FCoE connected
storage. This highlights the power and flexibility of a converged network. The iSCSI targeted Storage
Center is using Virtual Ports with 2 independent fault domains (the two VLANs that the Linux server is
aware of). Because it is using Virtual Ports, the control ports for each fault domain can be targeted, and
each control port will report back all available targets in its fault domain, simplifying the configuration
process.
# iscsiadm -m discovery -t st -p 10.10.140.4
10.10.140.4:3260,0 iqn.2002-03.com.compellent:5000d31000006923
10.10.140.4:3260,0 iqn.2002-03.com.compellent:5000d31000006925
# iscsiadm -m discovery -t st -p 172.16.26.4
172.16.26.4:3260,0 iqn.2002-03.com.compellent:5000d31000006922
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