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S1720GFR, S2700, S5700, and S6720 V200R010C00 Web-based Configuration Guide

This document describes the configuration and maintenance of device through the web network management system. The web network management system provides the functions of viewing device information and managing the entire system, interfaces, services, ACL, QoS, routes, security, and tools.
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STP

STP

The following sections describe how to query the STP information and set the global STP parameters, STP parameters on an interface, and parameters of an MST region.

The Spanning Tree Protocol (STP) is applicable to ring networks. It uses certain algorithms to implement path redundancy and prune a ring network into a tree-type network. This prevents increase and infinite circulation of packets in the ring network.

STP Information

You can view STP information on the STP Information page.

Procedure

  1. Choose Service Management > STP > STP Information in the navigation tree to open the STP Information page.
  2. Detailed STP information is displayed, as shown in Figure 2-125.

    Figure 2-125  STP Information

STP Global

You can set global STP parameters on the STP Global page.

Context

On certain networks, you need to modify STP parameters of some switches to optimize their performance.

Procedure

  1. Choose Service Management > STP > STP Global in the navigation tree to open the STP Global page, as shown in Figure 2-126.

    Figure 2-126  STP Global

    Table 2-68 describes the parameters on the STP Global page.

    Table 2-68  STP Global

    Parameter

    Description

    STP

    Indicates whether to enable STP. The options are Enabled and Disabled. By default, STP is enabled.

    Instance

    Instance

    Indicates the ID of a multi-spanning tree instance (MSTI). You can enter any MSTI ID ranging from 0 to 4094.

    Root type

    Indicates the root type of the switch. The options are:
    • Not set

      The root type is not set.

    • Primary

      The switch is configured as root switch of the MSTI.

    • Secondary

      The switch is configured as the backup root switch of the MSTI.

    By default, the Not set option is selected.

    Priority

    Specifies the priority of the switch.

    The priority is a major basis for the spanning tree calculation. You can set different priorities for a switch in different MSTIs.
    NOTE:

    In an instance, if Root Type is Not set, you can select a priority from the drop-down list box. If Root Type is Primary or Secondary, the priority cannot be set.

    Advanced Configuration

    BPDU protection

    Indicates whether to enable BPDU protection. The options are Enable and Disable. By default, BPDU protection is disabled.

    After BPDU protection is enabled, the switch shuts down the edge interfaces that receive BPDUs and notifies the NMS. The shutdown interfaces can only be manually started by the network administrator.

    Timeout

    Indicates the timeout interval. The timeout interval is calculated based on the hello interval and hello time multiplier.

    Working mode

    Indicates the working mode of STP. The options are:
    • MSTP

      The switch sends MSTP BPDUs in this mode.

    • STP

      The switch sends STP BPDUs in this mode.

    • RSTP

      The switch sends RSTP BPDUs in this mode.

    The default mode is MSTP.

    Max hop count

    Indicates the maximum hop count of the spanning tree in an MST region. The default value is 20.

    This parameter limits the network scale of the spanning tree in the MST region. A configuration message has the maximum hop count on the root bridge. The hop count decreases by 1 every time the configuration message passes a switch. When the hop count decreases to 0, the configuration message is discarded; therefore, switches with larger hop count from the root bridge cannot participate in the spanning tree calculation. This limits the network scale in an MST region.

    Standard for path cost calculation

    Indicates the algorithm used to calculate the path cost. The options are:
    • dot1t

      Indicates the algorithm defined in IEEE 802.1t.

    • dot1d-1998

      Indicates the algorithm defined in IEEE 802.1d.

    • legacy

      Indicates Huawei algorithm.

    The default algorithm is dot1t.

    Diameter

    Indicates the network diameter in the MST region. The default value is 7.

    The network diameter refers to the maximum number of devices between any two devices on a network.

    The network diameter reflects the network scale. A larger network diameter indicates a larger network scale.

    STP convergence mode

    Indicates the STP convergence mode. The options are:
    • Fast

      In this mode, the switch deletes the useless MAC address entries and ARP entries directly.

    • Normal

      In this mode, the switch sets the remaining aging time of the MAC address entries and the ARP entries to 0 and ages them. If the number of ARP aging detection times is greater than 0, the switch carries out aging detection of the ARP entries.

    The default mode is Normal.

    Set Bridge Diameter and Timer

    Forward delay

    Indicates the delay of port status transition. The default value is 1500 centiseconds.

    Hello time

    Indicates the interval for sending hello packets. The root bridge sends hello packets at this interval to check whether faulty links exist. The default value is 200 centiseconds.

    Max age

    Indicates the maximum lifetime of a configuration message. This parameter determines whether a configuration message has expired. The default value is 2000 centiseconds.

  2. Set the parameters.
  3. Click Apply to complete the configuration.

STP Interface

You can set STP parameters on an interface.

Context

On certain networks, you need to modify STP parameters of some switches to optimize their performance.

Procedure

  1. Choose Service Management > STP > STP Interface in the navigation tree, and the STP Interface page is displayed.
  2. Select an interface and click Configure, and the STP Interface Settings page is displayed, as shown in Figure 2-127.

    Figure 2-127  STP Interface Settings

    Table 2-69 describes the parameters on the STP Interface Settings page.

    Table 2-69  STP Interface Settings

    Parameter

    Description

    Interface

    Indicates the name of an interface. It is displayed automatically and cannot be modified after you select an interface. You can select only one interface each time.

    MSTP

    Indicates whether to enable MSTP. By default, MSTP is enabled.

    When STP is disabled on an interface, the interface does not take part in the spanning tree calculation and is always in Forwarding state.
    NOTE:

    Loops may occur when STP is disabled on an interface.

    Instance

    Instance

    Indicates the ID of an MSTI. You can select any MSTI ID ranging from 0 to 4094.

    Port priority

    Indicates the priority of the interface. A smaller value indicates a higher priority.

    The priority of an interface affects its role in the specified MSTI. You can set different priorities for an interface in different MSTIs so that traffic of VLANs can be load balanced among different physical links.
    NOTE:

    When the priority of an interface changes, MSTP recalculates the role of the interface and changes the status of the interface.

    Path cost

    Indicates the path cost of the interface. The value range varies according to the calculation algorithm of path costs. The value ranges from 1 to 200000 when Huawei algorithm is used; the value ranges from 1 to 65535 when the algorithm defined in IEEE 802.1D is used; the value ranges from 1 to 200000000 when the algorithm defined in IEEE 802.1t is used.

    The path cost is the basis for calculating the spanning tree. If you set different path costs for an interface in different MSTIs, traffic of different VLANs is load balanced among multiple physical links.
    NOTE:

    When the path cost of an interface changes, the MSTP recalculates the spanning tree based on the new path cost.

    Advanced

    Edge port

    When the spanning tree is recalculated, edge ports transit to the Forwarding state directly, which reduces the status transition time. If an Ethernet port is not connected to any Ethernet port of the switch, you need to configure the Ethernet port as an edge port. There are three statuses: Enabled, Disabled, None. The default value is None.

    Protection mode

    Indicates the protection mode on an interface. The options are:
    • None

      No protection type is adopted.

    • Root

      Root protection prevents topology changes caused by incorrect configurations or malicious attacks.

    • Loop

      When link congestion occurs or a unidirectional link is generated, the port connected to the link cannot receive BPDUs from the upstream switch. In this case, the local switch selects a new root port, the original root port becomes the designated port, and the blocked port transits to the Forwarding state. Loop is then generated on the switching network. To prevent this problem, you can enable loop protection.

    P2P

    Indicates the point-to-point connection type of the interface. The options are:
    • Auto

      The interface automatically detects whether it is connected to a point-to-point link.

    • Force-true

      The interface is connected to a point-to-point link.

    • Force-false

      The interface is not connected to a point-to-point link.

    The default value is Auto.

    Max BPDUs sent

    Indicates the maximum number of BPDUs that an interface can send in a hello interval.

    A larger value indicates more BPDUs sent in a hello interval and therefore more system resources occupied. A proper value of this parameter can limit the rate of sending BPDUs and prevent excessive bandwidth usage when network flapping occurs.

    Digest snooping

    Indicates whether to enable digest snooping. By default, digest snooping is disabled.
    NOTE:

    You can configure digest snooping to make the BPDU key of a Huawei device the same as that of a third-party device.

    Rapid transition

    Indicates the rapid status transition mode. The options are Normal and Enhanced. The default value is Enhanced.

  3. Set the parameters.
  4. Click OK.

    NOTE:

    Select a record on the STP Interface page and click Details. Detailed STP settings of the interface are displayed.

MST Region

You can modify the configuration of an MST region.

Context

You need to modify the configuration of an MST region when you want to add a switch that is not enabled with STP to the MST region or move a switch enabled with STP from one MST region to another.

Procedure

  1. Choose Service Management > STP > MST Region in the navigation tree to open the MST Region page.
  2. Click Modify to open the Modify Revision Level page, as shown in Figure 2-128.

    Figure 2-128  Modify Revision Level

    Table 2-70 describes the parameters on the Modify Revision Level page.

    Table 2-70  Modify Revision Level

    Parameter

    Description

    Region name

    Indicates the name of an MST region. The default value is the MAC address of the switch.

    The MST region name, the VLAN mapping table, and the MSTP revision level identify the region that the switch belongs to.

    Revision level

    Indicates the MSTP revision level of the MST region.

    The MST region name, the VLAN mapping table, and the MSTP revision level identify the region that the switch belongs to.

    Instance-VLAN Mapping Configuration

    Indicates the mappings between MSTIs and VLANs. You can add, modify, or delete a mapping. The following step is to add an instance-VLAN mapping.

    Add an instance-VLAN mapping.
    1. Click Add to open the Add Instance-VLAN Mapping page.
    2. Set the parameters.
      NOTE:
      You need to set the following parameters:
      • Instance: select an instance ID.
      • VLAN: enter a VLAN ID.
    3. Click Add.

  3. Click Activate to complete the configuration.
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Updated: 2019-08-21

Document ID: EDOC1000114003

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