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Configuration Guide - Device Management

S7700 and S9700 V200R013C00

This document describes the configurations of Device Management, including device status query, hardware management, CSS, SVF, PoE, OPS, OIDS, energy-saving management, information center, fault management, NTP, synchronous ethernet, PTP.
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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).
CSS Feature Limitations

CSS Feature Limitations

Features Not Supported in a CSS

After two switches set up a CSS, the following features are not supported in the CSS:
  • Synchronous Ethernet clock

  • Precision Time Protocol (PTP) (IEEE 1588)

CSS Specifications and Limitations

  • For MAD specifications:
    • A maximum of four direct detection links can be configured for each member switch in a CSS.
    • MAD in relay mode can be configured on a maximum of four Eth-Trunks in a CSS.
    • In V200R008C00 and earlier versions, a maximum of 64 Eth-Trunks can be configured on a relay agent to provide the relay function for multiple CSS systems. This restriction does not apply to versions later than V200R008C00.

Requirements for Loading a License for a CSS

To load a license for a CSS, see FAQ "How Do I Install a License File for a CSS?".

Configuration Guidelines for CSS Card Clustering
  • If MPUs of S7700 switches have flexible service units (FSUs) installed, the CSS connection mode cannot be set to CSS card connection. If an S7700 switch uses the CSS card connection mode and an FSU is installed on an MPU, the FSU is powered off.
  • When VS08/VS04 CSS cards are used to set up a CSS, the bandwidth that the MPUs provide to LPUs decreases because the CSS cards consume some bandwidth of the MPUs.

  • In a CSS set up using MPUs (SRUHsor SRUEs), if one chassis has two MPUs installed and the other has one MPU installed, MAD in relay mode need be configured.

Configuration Guidelines for Service Port Clustering

Hardware Installation:
  • Using LPUs with the same port speed is recommended. If member switches are connected using LPUs with different port speeds, inter-chassis forwarding may be unstable.
  • When member switches are connected in service port connection mode, FSUs can be installed on the member switches.
  • In service port clustering, if a device has CSS cards installed, CSS cards will be powered off.
Software Configuration:
  • When switches using SRUAs, SRUBs, SRUCs, and SRUDs set up a CSS in service port clustering mode, the system software file (system startup package) must be saved in the CF card. If the system software file is saved in the flash memory, the CSS cannot be set up in service port clustering mode.

  • If a switch using SRUCs needs to set up a CSS with a switch using SRUDs, run the undo detect-engine enable command to disable SRU hardware engine on the switch using SRUDs (and restart the switch for the configuration to take effect), and then configure the CSS function. If SRU hardware engine is not disabled on the switch using SRUDs, the two switches may restart repeatedly or the CSS may split and then merge.

  • Avoid deploying inter-chassis forwarding services on the LPUs that provide service ports for clustering. Such LPUs preferentially forward received traffic from local ports, so inter-card load balancing cannot be implemented.
  • If a load balancing profile is configured on the LPUs that provide service ports for clustering, traffic distribution among cluster links is affected, or even traffic loss may occur. The load balancing profile configured using the load-balance-profile command controls the load balancing mode used on cluster links. (If the specified profile does not exist, the default load balancing mode is used.) When configuring the load balancing mode for a specific type of packets using the mpls field, l2 field, ipv4 field, or ipv6 field command, you are advised to specify multiple keywords in the command so that traffic can be load balanced properly.
  • If the capwap source interface command has been executed to specify the source interface used by the AC to establish a CAPWAP tunnel with an AP, the port interface enable command configuration may fail because of insufficient ACL resources. The port interface enable command is used to add CSS member ports to a logical CSS port.

  • After a service port is configured as a CSS member port of a logical CSS port, the service port can transmit only CSS-related traffic and cannot be configured with any other services. Most commands are unavailable in the corresponding interface view, except the following
    • set flow-stat interval
    • description (interface view)
    • log-threshold input-rate output-rate
    • trap-threshold
    • display interface
    • display interface brief
    • display interface description
    • display counters
    • reset counters interface
    • reset counters if-mib interface
    • set flow-statistics include-interframe

Version Rollback:

If a member switch has FSUs installed and uses the service port connection mode, it cannot be downgraded to a version that does not support the service port connection mode. Therefore, before downgrading the system version to such a version, delete the configuration of the service port connection.

Updated: 2019-04-20

Document ID: EDOC1100065738

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