Configuring Egress Shaping Per Queue - Cisco 500 Series Administration Manual

Quality of Service
Configuring QoS - General
STEP 5
STEP 1
STEP 2
STEP 3
Cisco 500 Series Stackable Managed Switch Administration Guide
• Ingress Committed Burst Size (CBS)—Enter the maximum burst size of
data for the ingress interface in bytes of data. This amount can be sent even
if it temporarily increases the bandwidth beyond the allowed limit. This field
is only available if the interface is a port.
• Egress Shaping Rate—Select to enable egress shaping on the interface.
The minimum CIR that can be configured on the Egress Shaping Rate
NOTE
field is 2Mbps instead of 64Kbps, on the following switches: SF500 ports
GE1—GE4, and SG500 ports GE—49-GE52.
• Committed Information Rate (CIR)—Enter the maximum bandwidth for the
egress interface.
• Egress Committed Burst Size (CBS)—Enter the maximum burst size of data
for the egress interface in bytes of data. This amount can be sent even if it
temporarily increases the bandwidth beyond the allowed limit.
Click Apply. The bandwidth settings are written to the Running Configuration file.

Configuring Egress Shaping per Queue

In addition to limiting transmission rate per port, which is done in the Bandwidth
page, the device can limit the transmission rate of selected egressing frames on a
per-queue per-port basis. Egress rate limiting is performed by shaping the output
load.
The device limits all frames except for management frames. Any frames that are
not limited are ignored in the rate calculations, meaning that their size is not
included in the limit total.
Per-queue Egress rate shaping can be disabled.
To define egress shaping per queue:
Click Quality of Service > General > Egress Shaping per Queue.
The Egress Shaping Per Queue page displays the rate limit and burst size for each
queue.
Select an interface type (Port or LAG), and click Go.
Select a Port/LAG, and click Edit.
28
612