Understanding the License-Based Restriction on Aggregate
Bandwidth
The Cisco CSR 1000v includes a license shaper that may restrict the aggregate bandwidth of the router
’
s
interfaces. For example, if a 50 Mbps license is installed, then a maximum of 25 Mbps of bidirectional traffic
is possible.
The license shaper regulates the throughput on interfaces for both priority traffic and non-priority traffic:
•
(Cisco IOS XE 3.10S and earlier) The license shaper regulates the throughput on non-management
interfaces only. The GigabitEthernet 0 dedicated management interface is not counted
.
•
(Cisco IOS XE 3.11S and later, and IOS XE Denali 16.2 and later) The license shaper regulates the
throughput on all interfaces.
Throughput limits are checked globally, not on a per-interface basis. The license shaper does not distinguish
between different types of traffic, such as for IPSec or NAT. If the throughput level is exceeded, then packets
may get discarded.
The figure below shows how the license shaper, also known as a traffic shaper, works. In this example, the
four interfaces on the Cisco CSR 1000v are passing an aggregated traffic level of 60 Mbps. Because this
exceeds the 50 Mbps license-enforced maximum throughput, 10 Mbps of traffic is discarded.
To check the license-based performance limiter value, use the following command for your interface:
Router# show platform hardware qfp active feature qos queue out int GigabitEthernet1 hier
det | inc max:
orig_max
: 0
,
max: 33333
child policy-map
orig_max
: 0
,
max: 500000
parent policy-map
orig_max
: 0
,
max: 1050000000
interface rate limiter
orig_max
: 0
,
max: 2500000
license performance limiter
orig_max
: 0
,
max: 10000000000
entry for ROOT/SIP infra (ignore rate)
The value for the license performance limiter field should match the current maximum throughput level as
shown with the
show platform hardware throughput level
command.
The license shaper includes an extra scheduler node in the default HQF hierarchy. The Cisco CSR 1000v
does not provide an option to detect congestion for a particular node in the HQF hierarchy.
Note
For more information about verifying the VM performance indicators, see your hypervisor documentation.
Cisco CSR 1000v Series Cloud Services Router Software Configuration Guide
190
Installing Cisco CSR 1000v Licenses
Understanding the License-Based Restriction on Aggregate Bandwidth