Dell C1048P Port Extender Networking Command-Line Reference Guide for the C900 - Page 612

Command History Version 9.9(0.0) 9.7(0.1) 9.7(0.0) 9.3(0.0) Description Introduced on the C9010. Introduced on the S3048-ON and S4048-ON. Introduced on the S6000-ON. Introduced on the S4810, S4820T, S6000, and MXL platforms. Usage Information You must apply this buffer policy at the interface level for the attributes to be applicable in conjunction with the DCB input policy. For each QoS policy buffer, you can specify the shared buffer threshold limit, the ingress buffer size, buffer limit for pausing the acceptance of packets, and the buffer offset limit for resuming the acceptance of received packets. When PFC detects congestion on a queue for a specified priority, it sends a pause frame for the 802.1p priority traffic to the transmitting device. You can use set up both the administrative and peer-related PFC priorities. For example, you can configure the intended buffer configuration for all 8 priorities. If you configure the number of lossless queues as 4 and if the administrator-configured priorities configured within the DCB input policy is applied, then the configuration for those priorities are pre-designed. However, if the peer-provided priorities are applied, although a DCB input policy is present, the peer-provided priorities become effective for buffer configuration. This method of configuration provides an easy and flexible technique to accommodate both administratively-configured and peer-configured priorities. Example Dell(conf)# qos-policy-buffer test Dell(conf-qos-policy-buffer)#queue 0 pause no-drop buffer-size 128000 pausethreshold 103360 resume-threshold 83520 Dell(conf-qos-policy-buffer)# queue 4 pause no-drop buffer-size 128000 pausethreshold 103360 resume-threshold 83520 dcb-policy buffer-threshold (Interface Configuration) Assign the DCB policy to the DCB buffer threshold profile on interfaces. This setting takes precedence over the global bufferthreshold setting. C9000 Series Syntax Parameters dcb-policy buffer-threshold profile-name buffer-threshold profile-name Configure the profile name for the DCB buffer threshold Enter the name of the profile, which can be a string of up to 32 characters in length. Default None Command Modes INTERFACE mode Command History This guide is platform-specific. For command information about other platforms, see the relevant Dell Networking OS Command Line Reference Guide. Data Center Bridging (DCB) 612