iSCSI interface specifications

Provisioning Guide for VSP One Block
Version
10.2.x
Audience
anonymous
Part Number
MK-23VSP1B012-00
Protocol layer Item Specifications
All iSCSI target function Supported.
iSCSI initiator function Supported.

However, 25-Gbps iSCSI channel boards do not support the iSCSI initiator function.
Path switching

Windows: Microsoft DSM/MPIO

Linux: Device Mapper Multipath are available.

Native Multipath are available.

For details, contact customer support.
Number of connected hosts (connections) 127 connections per port.

The load on iSCSI ports increases when the number of connections increases. Use no more than 127 connections or less per port .
Physical layer, MAC layer Link 10 Gbps (optic): 10 Gbps SFP+

10 Gbps (copper): 10 Gbps/1 Gbps

25 Gbps (optic): 25 Gbps SFP28
Transfer speed 10 Gbps (optic): 10 Gbps

10 Gbps (copper): 10 Gbps/1 Gbps

25 Gbps (optic): 25 Gbps
Connector type 10 Gbps (optic): LC

10 Gbps (copper): RJ-45

25 Gbps (optic): LC
Cable 10 Gbps (optic): Multimode fiber cable (OM2/OM3/OM4)

10 Gbps (copper):

  • Category 6a LAN cable when the transfer speed is 10 Gbps.
  • Category 5e/6a LAN cable when the transfer speed is 1 Gbps.

25 Gbps (optic): Multimode fiber cable (OM3/OM4)
Network switch L2 switch, L3 switch

10 Gbps (optic): Conforms to IEEE 802.3ae (10 Gbps SFP+).

10 Gbps (copper):

  • Conforms to IEEE 802.3an (10GBASE-T).
  • Conforms to IEEE 802.3ab (1000BASE-T).

25 Gbps (optic): Conforms to IEEE 802.3by (25GBASE SR SFP28).
Cascading switches Up to five switches can be cascaded. If you increase the number of cascaded switches, the number of host I/O delays increases. Keep the number of cascaded switches to minimum.
MAC address Assigned to each port (fixed value).

Worldwide unique addresses are set at shipment. MAC addresses cannot be changed.
Maximum transmission unit (MTU) 1500/4500/9000 bytes (Ethernet frames)
Jumbo frame Supported.
Link aggregation Not supported.
VLAN Supported.

VLANs can be configured in the range of 1 to 4094 (port-based VLANs for switches are also available).
TCP/IP IPv4 Supported.
IPv6 Supported.
Subnet mask Supported.
Gateway Supported.
DHCP Not supported.
DNS Not supported.
Ping transmission Supported.
IPsec1 Not supported.
TCP port number 3260 (default)

The TCP port number can be changed in the range of 1 to 65535. Note the following:

  1. When you change the TCP port number, also change the settings of the host to be accessed.
  2. When you change the TCP port number, verify whether the new number is filtered and disabled by a switch on the path.
Fragmentation Not supported.
Window scale Supported.

Window size: 64 KB (default)/128 KB/256 KB/512 KB/1 MB
iSCSI iSCSI name Both the IQN2 and EUI3 formats are supported.

A worldwide unique IQN value is automatically set when an iSCSI target is set. However, iSCSI names can be changed.
Error recovery level Level 0.

Errors are corrected when a host retries. Levels 1 and 2 are not supported.
Header digest, data digest Supported.

Header digest and data digest protect headers and data in iSCSI communication from errors. iSCSI ports use these functions based on the host settings. However, if the functions are used, performance degrades (the rate of degradation changes depending on the host capabilities and the content of communication).
CHAP Supported.

CHAP is used to authenticate that login is performed by the registered hosts to access storage systems4.
Mutual CHAP Supported (not supported for connection with Linux hosts).

Mutual CHAP is used to authenticate that login is performed by hosts to access the registered storage systems. Mutual CHAP is also called two-way authentication.
Number of registered CHAP users Up to 256 users per iSCSI port
iSNS Supported.

By using iSNS (Internet Storage Name Service), you can discover targets without directly knowing their IP addresses.

Notes:

  1. Security Architecture for Internet Protocol: A group of protocols for authenticating and encrypting IP packets.
  2. IQN: iSCSI Qualified Name. The IQN format uses Internet domain names. Each name consists of a type identifier (iqn), year and month when a domain was established, domain name, and any name (string) you want to use.

    Example: iqn.1994-04.jp.co.hitachi:rsd.d7m.t.10020.1b000.Tar

  3. EUI: 64-bit Extended Unique Identifier. The IEEE EUI-64 format consists of a type identifier (eui) and a hexadecimal EUI-64 identifier in ASCII code.

    Example: eui.0123456789ABCDEF

  4. According to the iSCSI standard, CHAP authentication can be performed in a login session where an iSCSI initiator logs in to an iSCSI target, and a discovery session where connectable iSCSI initiators are searched for . Both types of sessions are supported.
  5. Not available for 25-Gbps iSCSI channel boards.