AutoQos for Routers
Routers can also use AutoQoS; recent IOS versions support AutoQos for
Enterprise applications. AutoQoS for Enterprise is currently supported only
on routers, and is a two-step process. The configuration can be manually
tuned after it is automatically generated.
Step 1. Application discovery and policy generation—The first step is
to enable application discovery on interfaces where QoS is
configured. NBAR is typically used for this. The router then
collects application data for the desired number of days, analyzes
the data, and creates QoS templates. You can review these configurations
before applying them to the interface.
Use the interface command auto discovery qos [trust] to enable
application discovery. Without the optional trust keyword, the
router uses NBAR. With it, the router classifies traffic by DSCP
markings. Use show auto discovery qos to view the traffic
discovered and the configuration that is implemented.
Step 2. Implement the AutoQoS policies—Apply the policies generated
by AutoQoS to the interface(s). Use the interface command auto
qos [voip [trust] fr-atm]. The optional voip keywork enables
only AutoQoS for VoIP. If you use this, you can then optionally
choose to trust the existing DSCP markings with the keyword
trust, or enable AutoQoS for frame-relay to ATM with the
optional keyword fr-atm. Use show auto qos to view the
AutoQoS configuration.