Alcatel-Lucent 6850-48 Network Guide

Configuring Global QoS Parameters

Configuring QoS

page 40-16

OmniSwitch AOS Release 6 Network Configuration Guide

• When automatic NMS prioritization is enabled, QoS policies that specify priority are not applied to the 

NMS traffic. Other QoS policies, however, are applied to this type of traffic as usual. If a policy speci-
fies rate limiting, then the policy with the lowest rate limiting value is applied.

The switch automatically trusts the priority of IP phone traffic by default. This means that the priority 
value contained in packets originating from IP phones is used for the ingress priority. The default priority 
value configured for the QoS port receiving such traffic is used for the egress priority of the packet.

IP phone traffic is detected by examining the source MAC address of the packet to determine if the 
address falls within the following ranges of IP phone MAC addresses:

00-80-9F-54-xx-xx to 00-80-9F-64-xx-xx 
00-80-9F-66-xx-xx to 00-80-9F-6F-xx-xx.

In addition to prioritizing IP phone traffic, it is also possible to automatically prioritize non-IP phone traf-
fic. This is done by adding up to four MAC addresses or four ranges of MAC addresses to the predefined 
QoS “alaPhone” MAC address group. See 

 for more information.

 command is used to enable or disable automatic prioritization of IP phone traffic. In addi-

tion, this command also specifies whether to trust the IP phone traffic (the default) or apply a specified 
priority value to the traffic. For example, the following command specifies a priority value to apply for 
ingress IP phone traffic:

-> qos phones priority 1

To trust IP phone traffic, enter the following command:

-> qos phones trusted

To disable automatic IP phone traffic prioritization for the switch, enter the following command:

-> qos no phones

Note that When automatic prioritization of IP phone traffic is enabled, QoS policies that specify priority 
are not applied to the IP phone traffic. Other QoS policies, however, are applied to this type of traffic as 
usual. If a policy specifies rate limiting, then the policy with the lowest rate limiting value is applied.

Quarantine Manager and Remediation (QMR) is a switch-based application that interacts with the 
OmniVista Quarantine Manager (OVQM) application to restrict the network access of quarantined clients 
and provide a remediation path for such clients to regain their network access. This functionality is driven 
by OVQM, but the following QMR components are configured through QoS CLI commands:

• Quarantined MAC address group. This is a reserved QoS MAC address group that contains the 

MAC addresses of clients that OVQM has quarantined and that are candidates for remediation. The 
default name of this group is “Quarantined”, but the user can specify a different name using the 

 command. 

• Remediation server and exception subnet group. This is a reserved QoS network group, called 

“alaExceptionSubnet”, that is configured with the IP address of a remediation server and any subnets to 
which a quarantined client is allowed access. The quarantined client is redirected to the remediation 
server to obtain updates and correct its quarantined state. IP addresses are added to this group using the 

 command.