Brocade Multi-Service IronWare QoS and Traffic Management Configuration Guide (Supporting R05.6.00) - Manual (Page 65)

Multi-Service IronWare QoS and Traffic Management Configuration Guide 51
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Configuring QoS
3
Configuring port-level QoS commands on CPU ports
The control packets destined to the CPU are assigned fixed priorities. The data and control packets
that are processed by the CPU are prioritized, scheduled, and rate-shaped so that the higher
priority control packets are handled before any lower priority control and data packets. The
enhanced control packet prioritization and scheduling scheme ensures the proper transmission or
reception of time-sensitive control and protocol packets.
Table 15 lists the protocol and data packets based on their priorities.
To configure a CPU port, enter the following command.
Brocade(config)# cpu-port
Brocade(config-cpu-port)#
Syntax: [no] cpu-port
The no option is used to disable QoS on the CPU port.
Configuring port-based rate shaping
You can limit the amount of bandwidth available on a CPU port by configuring the rate shaping
value for that port. To set the rate shaping value, enter the following command.
Brocade(config-cpu-port)# shaper 1000000
Syntax: [no] shaper rate
The rate parameter sets the rate shaping value for the CPU port. The acceptable value can be from
1 through 1000000 kilobits per second (Kbps).
The no option is used to reset the port shaping rate.
Configuring traffic scheduling
Traffic scheduling can be configured on a per-port and per-queue basis. Traffic scheduling affects
the outgoing traffic on the configured CPU port when bandwidth congestion occurs on that port.
One strict profile, three Weighted Round Robin (WRR) profiles, and four mixed profiles define the
scheduling attributes.The following sections describe how to configure each of the traffic
scheduling schemes:
TABLE 15 Prioritized protocol and data packets
Priority categorization Protocols
P7 LACP, UDLD, STP, RSTP, BPDU, VSRP, MRP, LLDP, VRRP, VRRP-E, 802.1x, FDP, CDP,
BFD, ERP, 802.1ag.
P6 OSPF, IS-IS, RIP, RIPNG, BGP, IPv6 Neighbor Discovery, CCP, LDP, RSVP.
P5 PIM, PIM-DM, IGMP, DVMRP, MLD.
P4 ARP, DHCP, BOOTP.
P3 Telnet, SNMP.
P2 Reserved.
P1 sFlow.
P0 Data packets.