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Table 9: Fabric Bandwidth
Fabric Bandwidth
Total fabric bandwidth
Available bandwidth
Bandwidth threshold
Total required bandwidth
Lower required bandwidth
The Bandwidth Threshold acts a check point to ensure substantial bandwidth availability to carry traffic to
the fabric cards.
User can set the threshold value starting with 10 and in increments of 10.
For example, consider that the bandwidth threshold is set to 20%. If the available bandwidth goes below 10%,
then the network interfaces of the line card are shut. If the available bandwidth goes above 20%, then the
network interfaces of the line card are unshut. The following table provides threshold references.
Table 10: Threshold Reference
Threshold
Bandwidth
threshold
Definition
Maximum bandwidth that is
supported between a line card NPU
and all fabric cards.
Total fabric bandwidth available
for traffic.
A percentage value denoting a limit
for bandwidth consumption.
Being a system level setting, the
threshold applies to all the line card
NPUs in the chassis.
Total Fabric Bandwidth x
Bandwidth Threshold.
Total fabric bandwidth x
(Bandwidth Threshold - 10%)
This computation is applicable only
for bandwidth threshold values
20% or higher.
For bandwidth threshold values of
below 20%, the "Lower required
bandwidth" is equal to "Total
required bandwidth".
Percentage
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10
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Cisco Nexus 9808 NX-OS Mode Switch Hardware Installation Guide
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Set Fabric Bandwidth Threshold
Significance
It is a constant value that is defined
by the hardware capacity.
It is a variable denoting real-time
bandwidth consumption.
It is a user configurable limit;
default value is 5%.
If is a calculated value as a function
of user-defined threshold.
Network interfaces on line card are
active only when "Available
bandwidth" is more than "Total
required bandwidth".
If is also a calculated value as a
function of user-defined threshold
and denotes a lower cut-off for
disabling network interfaces on line
card.
Disabling happens when "Available
bandwidth" falls below the "Lower
required bandwidth".
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