Brocade Multi-Service IronWare QoS and Traffic Management Configuration Guide (Supporting R05.6.00) - Manual (Page 64)

50 Multi-Service IronWare QoS and Traffic Management Configuration Guide
53-1003037-02
Configuring QoS
3
2. If you have already formed a LAG with the same configuration, you can change the
configuration by making changes to the LAG’s primary port.
3. If the LAG configuration is deleted, each of the port in the LAG (primary and secondary) will
inherit the QoS configuration of the primary port.
LAG configuration rules for QoS configurations using commands that begin with
the qos keyword
NOTE
Due to hardware considerations on the Brocade NetIron CER and Brocade NetIron CES devices, the
encode policy must be applied on the ingress interface.
In port-level QoS configurations where QoS configurations using commands that begin with the qos
keyword are used, the considerations listed below must be followed.
1. The secondary ports configured in the LAG must not have any QoS values configured on them.
2. The qos commands that are configured on the primary port are applied to all ports in the LAG.
3. Once the LAG is formed, you can change the QoS configuration for all ports in the LAG by
making changes to the LAG’s primary port and you cannot make changes to the QoS
configurations directly to any of the secondary ports.
4. If the LAG is deleted, the QoS configuration will only be retained on the primary port.
Due to hardware considerations on the Brocade NetIron CER and Brocade NetIron CES devices, the
encode policy must be applied on the ingress interface. This restriction results in the encode
policies being applied to all packets coming in on the ingress port, regardless of egress port. See
example configuration below.
!
Brocade(config)# interface ethernet 2/1
Brocade(config)# qos dscp encode-policy on
Brocade(config)# enable
Brocade(config)# priority force
Brocade(config)# priority 5
Brocade(config)# drop-precedence force
Brocade(config)# drop-precedence 3
Brocade(config)# mac access-group 1302 in
!
access-list 1302 permit any any 11 etype any dscp-marking 60
!
With the qos dscp encode-policy on and access-list 1302 applied, all packets coming in on
interface e 2/1 and VLAN 11 will have a modified dscp value of 60 on the egress regardless of the
egress port.
In the example, packets not matching the ACL would have the port value set, per “Forcing the drop
precedence of a packet” on page 46.