Alcatel-Lucent 7750 SR-OS, Configuration Manual

Page: 31 / 674

IP Router Configuration
7750 SR OS Router Configuration Guide Page 31
Enabling QPPB on an IP interface
To enable QoS classification of ingress IP packets on an interface based on the QoS information
associated with the routes that best match the packets the
qos-route-lookup command is necessary
in the configuration of the IP interface. The qos-route-lookup command has parameters to
indicate whether the QoS result is based on lookup of the source or destination IP address in every
packet. There are separate qos-route-lookup commands for the IPv4 and IPv6 packets on an
interface, which allows QPPB to enabled for IPv4 only, IPv6 only, or both IPv4 and IPv6. Note
however, current QPPB based on a source IP address is not supported for IPv6 packets nor is it
supported for ingress subscriber management traffic on a group interface.
The qos-route-lookup command is supported on the following types of IP interfaces:
• base router network interfaces (config>router>interface)
• VPRN SAP and spoke SDP interfaces (config>service>vprn>interface)
• VPRN group-interfaces (config>service>vprn>sub-if>grp-if)
• IES SAP and spoke SDP interfaces (config>service>ies>interface)
• IES group-interfaces (config>service>ies>sub-if>grp-if)
When the qos-route-lookup command with the destination parameter is applied to an IP interface
and the destination address of an incoming IP packet matches a route with QoS information the
packet is classified to the fc and priority associated with that route, overriding the fc and priority/
profile determined from the sap-ingress or network qos policy associated with the IP interface (see
section 5.7 for further details). If the destination address of the incoming packet matches a route
with no QoS information the fc and priority of the packet remain as determined by the sap-ingress
or network qos policy.
Similarly, when the qos-route-lookup command with the source parameter is applied to an IP
interface and the source address of an incoming IP packet matches a route with QoS information
the packet is classified to the fc and priority associated with that route, overriding the fc and
priority/profile determined from the sap-ingress or network qos policy associated with the IP
interface. If the source address of the incoming packet matches a route with no QoS information
the fc and priority of the packet remain as determined by the sap-ingress or network qos policy.
Currently, QPPB is not supported for ingress MPLS traffic on network interfaces or on CsC PE’-
CE’ interfaces (config>service>vprn>nw-if).