Release Notes

Connectivity considerations
12 Dell EMC PowerVault ME4 Series and Linux | 3924-BP-L
2. Execute the following CLI command to show the host-port information. The following shows
information for one FC port.
# show ports detail
Ports Media Target ID Status
Speed(A) Health Reason Action
--------------------------------------------------------------------------------
---------
A0 FC(P) 207000c0fff03b17 Up 16Gb
OK
Topo(C) PID SFP Status Part Number Supported Speeds
------------------------------------------------------------------
PTP N/A OK FTLF8529P3BCV-1D 4G,8G,16G
2.2.2 iSCSI
The following iSCSI network best practices are recommended:
• Use dual network switches to provide network-level redundancy.
• Use two dedicated iSCSI networks to isolate iSCSI traffic between the hosts and the ME4 Series
array from other public or application traffic. See Table 2 for an example.
• Use two dedicated network ports on the host for path redundancy.
• Use 10 Gb network HBAs and switches for better performance.
• Use auto-negotiate for all interfaces that negotiate at full-duplex and at the maximum speed of the
connected port.
• Enable flow control on all servers and switch ports that handle iSCSI traffic. A minimum of receive
(RX) flow control should be enabled for all switch interfaces used by the servers and storage systems
for iSCSI traffic.
• Enable symmetric flow control for all server interfaces used for iSCSI traffic.
• For multipathed iSCSI, use two separate VLANs and separate IP subnets.
• Disable unicast storm control on iSCSI switches.
• Disable multicast or set multicast storm control to enabled at the switch level for all iSCSI VLANs.
• If using Jumbo frames for improved performance, make sure all devices on the transmission path
have Jumbo frames enabled and support 9,000 as the maximum transmission unit (MTU).
• If the switches do not support both flow control and Jumbo frames at the same time, Dell EMC
recommends choosing flow control over Jumbo frames.
• Refer to the ME4 Series Deployment Guide on Dell.com/support for additional iSCSI best-practice
information.
iSCSI port assignment examples
Network/VLAN
iSCSI HBA port
ME4 Series iSCSI ports
All-iSCSI port configuration
FC/iSCSI port configuration
Network 1/VLAN 1
eth0
A0, B0, A2, B2
A2, B2*
Network 2/VLAN2
eth1
A1, B1, A3, B3
A3, B3*
*In an FC/iSCSI configuration, only ports A2, A3, B2, and B3 are available. Ports A0, A1, B0, and B1 are reserved for FC.