HP Surestore 6164 Switch - Manual (Page 17)

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USING REMOTE SWITCH
You can configure switches for use with Remote Switch through Telnet or
through Web Tools. For information about using Web Tools to configure a
switch, see the Web Tools User’s Guide.
The Remote Switch feature operates in conjunction with a fibre channel to
ATM gateway. The gateway provides both a fibre channel physical
interface functioning as an E_Port and an ATM physical interface.
The gateway accepts fibre channel frames from one side of a
Remote Switch fabric, transfers them across a WAN using ATM protocol,
and passes them to the other side of the Remote Switch fabric.
To transfer frames across a WAN using ATM protocol, fibre channel frames
(from 256 to 2112 bytes) must be broken into smaller pieces (53 byte ATM
cells) at the local end of the ATM network. When they are broken into
smaller pieces, they are tunnelled inside ATM cells to be transmitted across
the ATM network. At the remote end of the ATM network these pieces are
re-assembled back into complete fibre channel frames and transmitted
through the remote fibre channel interface.
To accomplish this task, the gateway provides an E_Port interface that links
to the switch E_Port. When the link between the two E_Ports is negotiated,