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Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 20 DLPs D300 to D399
DLP- D355 Change Distance Extension Port Settings for the FC_MR-4 Card
Step 4 Click Apply.
Step 5 Return to your originating procedure (NTP).
Table 20-28 FC_MR-4 Card Distance Extension Port Settings
Parameter Description Options
Port (Display only) The card port number. 1 through 4
Enable Distance
Extension
If checked, allows additional distance by providing
a GFP-T based flow control scheme. It enables the
node to be a part of a Storage Area Network (SAN)
with long-distance, remote nodes. If left unchecked,
the remaining options are not available for editing.
If Distance Extension is enabled, set the connected
Fibre Channel switches to Interop or Open Fabric
mode, depending on the Fibre Channel switch. By
default, the FC_MR-4 card will interoperate with
the Cisco MDS storage products.
—
Auto Detect
Credits
If checked, enables the node to detect the transmit
credits from a remote node. Credits are used for link
flow control and for Extended Link Protocol (ELP)
login frames between Fibre Channel/fiber
connectivity (FICON) Switch E ports.
—
Credits
Available
Sets the number of credits if an ELP login frame
setting is missing or if the ELP login frame cannot
be detected. Credits Available is editable only if
Auto Detect Credits is unchecked.
Note Longer distances between connected
devices need more credits to compensate for
the latency introduced by the long-distance
link. The value should never be greater than
the number of credits supported by the Fibre
Channel/FICON port.
Numeric. 2 through 256,
multiples of 2 only
Autoadjust GFP
Buffer
Threshold
If checked, guarantees the best utilization of the
SONET/SDH transport in terms of bandwidth and
latency.
—
GFP Buffers
Available
Sets the GFP buffer depth. GFP Buffers Available is
editable if Autoadjust GFP Buffer Threshold is
unchecked. For shorter SONET transport distances,
Cisco recommends lower values to decrease
latency. For longer SONET transport distances,
Cisco recommends higher values to provide higher
bandwidth.
Numeric. 16 through 1200,
multiples of 16 only
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