Brocade Multi-Service IronWare QoS and Traffic Management Configuration Guide (Supporting R05.6.00) - Manual (Page 92)

78 Multi-Service IronWare QoS and Traffic Management Configuration Guide
53-1003037-02
Backward compatibility with pre-03.8.00
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• The primary use of these commands is for packet remarking (without changing the internal
priority of the packet if desired)
qos-tos trust indicates the priority to be trusted on the Ingress interface (cos, dscp or ip-prec).
qos-tos mark indicates which priority is to be marked on the Egress interface (cos or dscp).
• qos-tos trust and qos-tos mark commands are both applied at the Ingress interface (physical
or virtual).
For instructions concerning the configuration of these commands, refer to “Specifying the trust
level and enabling marking” on page 108.
NOTE
Because these commands use L4 CAM entries, this may not be used in conjunction with L2 or L3
Multicast Forwarding, or other ACL's.
DSCP-priority mapping commands
In releases prior to 03.8.00, there is a command that globally maps the DSCP priorities in the
incoming packets to an internal priority. This command: “qos-tos map dscp-priority” is not available
in release 03.8.00 and later. If you have configured the qos-tos map dscp-priority command in a
previous release, the operation of your device will not be changed by upgrading but the
configuration commands in the configuration file will be automatically updated to the commands
introduced in release 03.8.00. This will be done by the method described in the following:
• the mapping defined by the qos-tos map dscp-priority commands is converted to a
qos-mapping configuration of a decode map titled USER_DSCP_MAP.
• If the port-priority command is configured, the qos dscp encode-policy command is included in
the configuration and the decode map titled: USER_DSCP_MAP is applied globally on the
device.
Mapping from qos-tos mapping to USER_DSCP_MAP
As described previously, in release 03.8.00 and later, a configuration containing qos-tos map
dscp-priority commands is converted to a qos-mapping configuration of a decode map titled
USER_DSCP_MAP. The following qos-tos map dscp-priority commands map various DSCP priority
values to internal priorities from 0 to 7.
The following example displays the USER_DSCP_MAP configuration and binding.
Brocade(config)# port-priority
Brocade(config)# qos-tos map dscp-priority 0 2 3 4 to 1
Brocade(config)# qos-tos map dscp-priority 8 to 5
Brocade(config)# qos-tos map dscp-priority 16 to 4
Brocade(config)# qos-tos map dscp-priority 24 to 2
Brocade(config)# qos-tos map dscp-priority 32 to 0
Brocade(config)# qos-tos map dscp-priority 40 to 7
Brocade(config)# qos-tos map dscp-priority 48 to 3
Brocade(config)# qos-tos map dscp-priority 56 to 6