Release Note для Spectra Logic spectra t120

Supported SFPs

December 2008

Spectra T950 Library

Spectra Logic recommends using quad-rate SFPs with all E-QIPs and F-
QIPs. These can be ordered directly from Spectra Logic (PN 7964).

The only quad-rate SFP manufacturers certified by Spectra Logic are:
ƒ PicoLight (Vendor PN PLR-XPL-VE-SG4-62-N)
ƒ JDSU (Vendor PN JSH-42S3AB3)

Copper RJ-45 SFPs are supported on the G3 E-QIP. Copper SFPs are 
designed for use with Gigabit Ethernet connections only and are not for use 
with Fibre Channel connections. These can be ordered directly from 
Spectra Logic (PN 7387).

The only Copper SFP manufacturers certified by Spectra Logic are:
ƒ 3COM (Vendor PN 3CSFP93)
ƒ Agilent (Vendor PN HBCU-5710R)
The minimum cable requirements when using the copper SFPs is CAT5e. 
CAT6 cable is highly recommended for distances greater than 10 feet.

Using Copper SFPs   There is currently an issue with the way copper SFPs 
report link status. A copper SFP reports a link-up status as soon as it is 
plugged into a QIP, whether or not an RJ-45 cable is plugged into it or there 
is actually a link to the network. Since there is no way for the QIP to detect 
a link-down status, there are potential problems when the link status 
changes, such as when a system reboots or when the cable is connected to 
or disconnected from a network. There are also potential problems of 
missed, dropped, or fragmented iSCSI packets when the link status 
changes.

To work around this problem, physically unplug the SFP from the QIP and 
plug it back in whenever a link status changes, including when a system 
reboots and any time the RJ-45 connecting the QIP and to the network is 
unplugged. Physically unplugging the SFP from the QIP and plugging it 
back in causes a link status change that the QIP can detect.