Brocade Network OS Administrator’s Guide v4.1.1 - Manual (Page 515)

The Differentiated Services Code Point (DSCP) value affects how Auto QoS operates by specifying
the priority value for Network Attached Storage traffic on IP networks. If you do not specify a DSCP
value, the DSCP value is set to the default of 0. Higher numbers provide a higher level of priority.
The following example sets the DSCP value to 56:
switch(config)# set dscp 56
4. Identify the IPv4 network addresses (either origination or destination) used by the NAS devices by
entering nas server-ip followed by the IP address including the mask and then one of the following:
• vlan vlan_ID
• vrf vrf_Name
NOTE
Associating both a VRF and a VLAN value to the same server IP address is strongly discouraged, as
this will cause errors in reporting NAS statistics.
5. Press Enter after you add each address entry.
The following example adds two addresses, one using a VLAN mask, and the other a VRF mask.
switch(config)# nas server-ip 10.192.100.100/32 vlan 100
switch(config)# nas server-ip 10.192.100.101/32 vrf bruce
Disabling Auto QoS for NAS
Disabling Auto QoS (Quality of Service) for NAS removes the minimum bandwidth guarantee for
Network Attached Storage traffic.
Disabling Auto QoS for NAS:
• Disables Auto QoS functionality for NAS
• Restores the default bandwidth settings if you have not made any changes to the CEE map after
enabling Auto QoS. If you have made changes, the portion of the bandwidth you assigned to NAS
traffic will revert to the LAN bandwidth.
• Replaces PGID 3 with PGID 2 in the priority table
• Deletes PGID 3
• Increases the weight of PGID 2 by 20
Use the following procedure to disable Auto QoS for NAS traffic and restore the default CoS and DSCP
values.
1. Enter no nas auto-qos in configuration mode.
switch(config)# no nas auto-qos
2. Enter no set cos in route-map configuration mode to disable CoS for NAS and restore the default
value.
switch(config)# no set cos
3. Enter no set dscp in route map configuration mode to disable DSCP for NAS and restore the default
value.
switch(config)# no set dscp
Displaying Auto-NAS configurations
Network OS allows you to display Network Attached Storage server configurations for all NAS servers.
Use the following command to display the Auto-NAS configuration for a switch.
Enter show system internal nas.
Disabling Auto QoS for NAS
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