Use tcp/ip dscp or l2cos to prioritize fc traffic – Brocade Network Advisor SAN User Manual v12.3.0 User Manual
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Brocade Network Advisor SAN User Manual
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Adding an FCIP circuit
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8. The Metric list is used to identify a failover circuit. By assigning a non-zero metric (1), you
identify the circuit as a failover circuit. By default, a circuit is assigned a metric of 0. If a metric
0 circuit fails, FCIP trunking tries first to retransmit any pending send traffic over another circuit
with a metric of 0. If no circuits with a metric of 0 are available, then the pending send traffic is
retransmitted over any available circuit with a metric of 1.
The default metric value for a crossport circuit configuration is 1. If a failover circuit is created
with a metric of 0, it will be used for load balancing and not for failover.
9. Designate a Failover Group ID for the circuit from 0 through 9. A value of 0 designates the
default failover group or no failover group.
With circuit failover groups you can better control which metric 1 circuits will be activated if a
metric 0 circuit fails. For Circuit Failover Grouping, you define a set of metric 0 and metric 1
circuits that are part of the same failover group. When all metric 0 circuits in the group fail,
metric 1 circuits will take over data transfer, even if there are metric 0 circuits still active in
other failover groups. For more information on Circuit Failover Grouping, refer to
NOTE
Failover Group ID will only be enabled when the switch or chassis is using Fabric OS v7.2 and
later.
10. Select values for bandwidth settings. An uncommitted bandwidth is not allowed on an FCIP
circuit. You must select Committed bandwidth. If you want to use ARL, set Minimum and
Maximum bandwidth values. Bandwidth grows towards the maximum and reduces towards the
minimum based on traffic conditions. If you do not want to use ARL, set Minimum and
Maximum to the same value to set a single committed bandwidth. Refer to
on page 942 for more information about ARL.
NOTE
The Committed value range in the Add FCIP Circuit dialog box depends on the Extension Switch
or Blade platform.
NOTE
For the Brocade 7840, the Minimum bandwidth value is 20 Mbps and Maximum bandwidth
value is based on the available license and port speed. For example, if user selects 1G port for
connectivity and 10G port for HA connectivity, the maximum allowed bandwidth on the circuit
is 1 Gbps but for 10G and 40G combination, the maximum allowed bandwidth on the circuit is
10 Gbps.
11. If the physical connection exists, click Verify IP Connectivity to test the connection between
switch one and switch two. The IP connectivity of the connection is tested with the ping utility.
12. Select Advanced Settings from the Add FCIP Circuit dialog box and continue if you want to do
any of the following:
•
Disable selective acknowledgement if your system cannot support selective
acknowledgement.
•
Set the keep alive timeout to a value other than the default of 10 seconds.
•
Set the minimum retransmission time to a value other than the default of 100 ms.
•
Set the maximum retransmits to a value other than the default.
•
Use TCP/IP DSCP or L2CoS to prioritize FC traffic.