D-Link DSN-3400-20 User Guide - Page 93

Table 5-2. Advanced System Settings

Get D-Link DSN-3400-20 - Xstack 1X10GBE Iscsi San Array 3U PDF manuals and user guides
UPC - 790069299773
View all D-Link DSN-3400-20 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 93 highlights

Advanced Setting Table 5-2. Advanced System Settings Description Remote System Time Date and time of the xStack Storage, adjusted for its local time zone. iSCSI Port Number Specifies the TCP port number used for the iSCSI communication. The default value for the iSCSI protocol is 3260 and should not be changed. TCP/IP - Time to Live Specifies the Time To Live value set in the header of outgoing IP packets. This value determines the maximum number of seconds an IP packet can live in the network without reaching its destination. This limits the number of hops an IP packet can pass through before being discarded. Default is 64 seconds. TCP/IP - Maximum IP Segmentation Specifies the largest amount of data, in bytes, that TCP is willing to send in a single segment. For best performance, this value should be set small enough to avoid IP fragmentation, which can lead to excessive retransmissions if there is packet loss. Default is 8960 bytes. TCP/IP - Window Scale For efficient use of high bandwidth networks, a larger TCP window size can be used. This option increases the maximum window size from 65,535 bytes to 1 Gigabyte. Scaling up to larger window sizes is a part of what is necessary for TCP Tuning. This option is used only during the TCP 3-way handshake. The window scale value represents the number of bits to left-shift the 16-bit window size field. The window scale value can be set from 0 (no shift) to 14. Default is 0. TCP/IP - Timestamp Causes the receiving computer to send a time-stamp reply back to the originating computer. Systems can use time-stamp requests and replies to measure the transmission speed of datagrams on a network.. Choices are:  Enabled = TCP/IP timestamp is enabled.  Disabled = TCP/IP timestamp is disabled. (default) TCP/IP - PMTU Determines whether the xStack Storage automatically adapts its packet size. Choices are:  Enabled = xStack Storage automatically adapt its packet size. (default)  Disabled = xStack Storage keeps its default packet size (576 bytes), even if it receives an ICMP request to change its packet size. This can render some remote systems unreachable, because if intermediate systems on the path to the remote system cannot support the default packet size, the xStack Storage ignores their requests to make the packets smaller. TCP/IP - Reset Upper Layer Counter Determines whether the TCP/IP upper layer counters can be reset. Resetting the counters simplifies the ability to look at the counters for an accurate percentage of packets sent or received. Choices are:  Enabled = upper layer counters can be reset.  Disabled = upper layer counters cannot be reset. (default) Email Notification Enabled Indicates whether the xStack Storage will send an alert notifications by email when an event occurs. Choices are:  Enabled = xStack Storage will send an email alert. If you select this setting, the following four fields must also be completed.  Disabled = xStack Storage will not send an email alert. (default) Email To Address Enter the email address where notifications are to be sent. This can be an individual email address or a distribution list. Email From Address Enter an IP address, email address, or other meaningful entry that identifies the xStack Storage as the source of the email. xStack Storage Management Center Software User's Guide 83

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
xStack Storage Management Center Software User’s Guide
83
Table 5-2. Advanced System Settings
Advanced Setting
Description
Remote System Time
Date and time of the xStack Storage, adjusted for its local time zone.
iSCSI Port Number
Specifies the TCP port number used for the iSCSI communication. The default
value for the iSCSI protocol is 3260 and should not be changed.
TCP/IP – Time to Live
Specifies the Time To Live value set in the header of outgoing IP packets. This
value determines the maximum number of seconds an IP packet can live in the
network without reaching its destination. This limits the number of hops an IP
packet can pass through before being discarded. Default is 64 seconds.
TCP/IP – Maximum IP Segmentation
Specifies the largest amount of data, in bytes, that TCP is willing to send in a
single segment. For best performance, this value should be set small enough to
avoid IP fragmentation, which can lead to excessive retransmissions if there is
packet loss. Default is 8960 bytes.
TCP/IP – Window Scale
For efficient use of high bandwidth networks, a larger TCP window size can be
used. This option increases the maximum window size from 65,535 bytes to 1
Gigabyte. Scaling up to larger window sizes is a part of what is necessary for TCP
Tuning. This option is used only during the TCP 3-way handshake. The window
scale value represents the number of bits to left-shift the 16-bit window size field.
The window scale value can be set from 0 (no shift) to 14. Default is 0.
TCP/IP – Timestamp
Causes the receiving computer to send a time-stamp reply back to the originating
computer. Systems can use time-stamp requests and replies to measure the
transmission speed of datagrams on a network.. Choices are:
Enabled = TCP/IP timestamp is enabled.
Disabled = TCP/IP timestamp is disabled. (
default
)
TCP/IP – PMTU
Determines whether the xStack Storage automatically adapts its packet size.
Choices are:
Enabled = xStack Storage automatically adapt its packet size. (
default
)
Disabled = xStack Storage keeps its default packet size (576 bytes), even if it
receives an ICMP request to change its packet size. This can render some
remote systems unreachable, because if intermediate systems on the path to
the remote system cannot support the default packet size, the xStack Storage
ignores their requests to make the packets smaller.
TCP/IP – Reset Upper Layer Counter
Determines whether the TCP/IP upper layer counters can be reset. Resetting the
counters simplifies the ability to look at the counters for an accurate percentage of
packets sent or received.
Choices are:
Enabled = upper layer counters can be reset.
Disabled = upper layer counters cannot be reset. (
default
)
Email Notification Enabled
Indicates whether the xStack Storage will send an alert notifications by email when
an event occurs. Choices are:
Enabled = xStack Storage will send an email alert. If you select this setting, the
following four fields must also be completed.
Disabled = xStack Storage will not send an email alert. (
default
)
Email To Address
Enter the email address where notifications are to be sent. This can be an
individual email address or a distribution list.
Email From Address
Enter an IP address, email address, or other meaningful entry that identifies the
xStack Storage as the source of the email.