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Configuration Guide - Device Management

S9300, S9300E, and S9300X V200R012C00

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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CSS Connection Modes

CSS Connection Modes

Member switches can set up a CSS through CSS card connection or service port connection.
  • CSS card connection

    Member switches are connected using CSS cards on MPUs or SFUs and cluster cables.

  • Service port connection

    Member switches are connected using service ports on service cards, without requiring CSS cards. The service ports must be configured as physical member ports of logical CSS ports. Figure 3-25 shows physical member ports and logical CSS ports in a CSS.

    Figure 3-25  Service port connection
    • Physical member port

      A physical member port is a service port used to set up a CSS link between CSS member switches. Physical member ports forward service packets or CSS protocol packets between member switches.

    • Logical CSS port

      A logical CSS port is bound to physical member ports for CSS connections. Each CSS member switch supports two logical CSS ports.

Table 3-2 compares the CSS card connection and service port connection modes.
Table 3-2  Comparison of CSS connection modes
Item CSS Card Connection Service Port Connection Description
Whether CSS cards are required


If MPUs and SFUs have integrated CSS cards, no CSS cards are required.
No The CSS card connection mode ensures high stability and low latency, and facilitates CSS troubleshooting.
Whether service ports are occupied No Yes The service port connection mode occupies service ports and requires at least 10GE ports on service cards.
Cluster cable connection requirements CSS cards of switches must be connected according to cable connection rules. Switches can set up a CSS as long as they are connected by one cluster cable. It is recommended that the switches be connected by at least two cluster cables. The service port connection mode is more flexible:
  • Even if multiple cluster cables fail, the CSS can still work, as long as one cluster cable is working normally.
  • The CSS card connection mode requires complex cabling and allows only a few faulty cluster cables. For example, LE0D0VSTSA00 (S9300) CSS card connection allows only one faulty cluster cable. LE2D2VS08000 (S9300E) CSS card connection allows at most three faulty cluster cables in case of full-mesh connections.
Configuration complexity Simple Complex The service port connection mode requires service ports to be configured as physical member ports of logical CSS ports.
Updated: 2018-09-03

Document ID: EDOC1100038289

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