Dell Networking S6000 System, Справочное руководство

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Default The default size of the ingress buffer is 45 KB. The default buffer limit at which the
port sends the pause to peer and recommences the sending of packets to the peer
is 10 KB. The default threshold weight of the shared buffer space is 10.
Command
Modes DCB-BUFFER-THRESHOLD mode
Command
History
Version 9.3(0.0) 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
S4810-YU-MR-Dell(conf)# qos-policy-buffer test
S4810-YU-MR-Dell (conf-qos-policy-buffer)#queue 0 pause no-drop
buffer-size 128000 pause-threshold 103360 resume-threshold
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S4810-YU-MR-Dell (conf-qos-policy-buffer)# queue 4 pause no-
drop buffer-size 128000 pause-threshold 103360 resume-threshold
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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 buffer-threshold setting. This utility is supported on the S6000 platform.
Syntax
dcb-policy buffer-threshold profile-name
Parameters
buffer-
threshold Configure the profile name for the DCB buffer threshold
Data Center Bridging (DCB)
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