No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Configuration Guide - QoS

CloudEngine 12800 and 12800E V200R003C00

This document describes the configurations of QoS functions, including MQC, priority mapping, traffic policing, traffic shaping, interface-based rate limiting, congestion avoidance, congestion management, packet filtering, redirection, traffic statistics, and ACL-based simplified traffic policy.
Rate and give feedback :
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Licensing Requirements and Limitations for Priority Mapping (CE12800E)

Licensing Requirements and Limitations for Priority Mapping (CE12800E)

Involved Network Elements

Other network elements are not required.

Licensing Requirements

Priority mapping is a basic feature of a switch and is not under license control.

Version Requirements

Table 4-1 Products and minimum version supporting priority mapping

Product

Minimum Version Required

CE12800E

V200R002C50

Feature Limitations

Default Trusted Priority

  • Layer 3 physical interfaces trust DSCP priorities. This cannot be modified.

Limitations on Priority Mapping

  • The default DiffServ domain is default. In addition to this domain, the device supports a maximum of seven DiffServ domains. You can change the mapping in the DiffServ domain default, but cannot delete the domain.
  • Colors are used to determine whether the packets are discarded during congestion avoidance and are independent of the mapping between internal priorities and queues.
  • Only queues 0, 1, 2, and 6 are available for unknown unicast packets on the configured with ED-E, EG-E, and EGA-E series cards.

Limitations on Interface Priority

  • The priority of a Layer 3 physical interface is 0 and cannot be configured.
  • If no DiffServ domain is applied to an inbound interface and the interface priority is configured, the device adds a VLAN tag to received packets, uses the interface priority as the packet priority, and sends packets to queues based on the interface priority.

Limitations When Priority Mapping Is Used with Other Services

  • You can create a DiffServ domain, enable the mapping between PHBs and DSCP/802.1p priorities in the outbound direction, and configure the mapping between CoS values and queue indexes only in the Admin-VS in port mode. The configurations take effect for other VSs in port mode.

  • You can create a DiffServ domain, enable the mapping between PHBs and DSCP/802.1p priorities in the outbound direction, and configure the mapping between CoS values and queue indexes in all VSs in group mode. The configurations take effect for the local VS.

  • When FCF or NPV is configured, the mapping from PHBs to 802.1p priorities in the outbound direction cannot be disabled. Otherwise, the device cannot send backpressure signals.
  • For the CE12800E equipped with ED-E, EG-E, and EGA-E series cards, when 10GE interfaces numbered 1 to 12 are used to form a stack, stacking packets enter the interface queue corresponding to priority 7, and non-stacking packets with priority 7 enter the interface queue corresponding to priority 6. In this case, the interface queue corresponding to priority 6 is congested and packets are lost. When the CE12800E is used in a stack, 40GE/100GE interfaces are recommended. If 10GE interfaces are used, 10GE interfaces numbered 13 to 48 are recommended.

Translation
Download
Updated: 2019-05-05

Document ID: EDOC1100004202

Views: 24199

Downloads: 25

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next