McDATA Eclipse 2640 SAN, Administration And Configuration Manual

Page: 117 / 276

5
Configuring iSCSI Connections
5-9
Configuring iSCSI Ports
NOTE:
Enabling reorder resistance could slightly delay recovery from
dropped packets in short data messages.
Specify the number of ACKs that trigger
Fast Retransmit
or
Fast
Recovery
using the
Threshold
field. Valid values are between 8 to 128,
with a default of 8. Larger values reduce retransmissions by causing
the SAN Router to wait longer for retransmitted packets to arrive.
This may delay the detection of dropped packets.
Setting the iSCSI parameters
After you have set the port as an iSCSI port, set the iSCSI parameters
for the port:
1. Select the
iSCSI
check box under
iSCSI/iFCP Port Parameters
.
2. Specify the port's external IP address. This IP address will be used
by the iSCSI devices to connect to the SAN Router. This is also the
iSCSI Target address to configure for your iSCSI initiator. Refer to
The iFCP/iSCSI Port IP Address
on page 2-17.
NOTE:
This IP address must be in a subnet different from the SAN
Router’s inband subnet.
3. Specify the
Subnet mask
. This is the subnet mask to use for this
port after the next port reset or system reset.
4. Configure the Next Hop Gateway address. This is the gateway
address used for this port after the next system reset. TCP ports
act as end nodes (hosts) attached to the WAN, and therefore may
have a different gateway than the default gateway used by
non-TCP ports connecting to the local SAN. Refer to
The Next Hop
Gateway IP Address
on page 2-18.
5. Configure the internal address. The internal address is used by
the SAN Router for its own internal operation and must be on the
same subnet as the SAN Router inband IP address. Refer to
The
Internal IP Address
on page 2-19
Setting Advanced iSCSI Parameters
Set the advanced iSCSI parameters to customize the iSCSI behavior of
the port. Use the following steps to carry out these tasks.