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Log Reference

CloudEngine 8800, 7800, 6800, and 5800 V200R005C00

This document provides the explanations, causes, and recommended actions of logs on the product.
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MSTP/4/MSTPLOG_PROROOT_CHANGED

MSTP/4/MSTPLOG_PROROOT_CHANGED

Message

MSTP/4/MSTPLOG_PROROOT_CHANGED:The root bridge of MSTP process changed. (ProcessID=[ProcessID], InstanceID=[InstanceID], RootPortName=[PortName], PreviousRootBridgeID=[PreRootBridgeID], NewRootBridgeID=[NewRootBridgeID], RootPwName=[PwName] PreTimeVector: Hello=[PreHello], MessageAge=[PreMessAge], Fwdly=[PreFwdly], RemainingHops=[PreMessHop], NewTimeVector: Hello=[NewHello], MessageAge=[NewMessAge], Fwdly=[NewFwdly], RemainingHops=[NewMessHop])

Description

The root bridge in the MSTP process changed.

Parameters

Parameter Name Parameter Meaning
ProcessID Indicates the ID of an MSTP process.
InstanceID Indicates the instance ID.
RootPortName Indicates the name of the root port.
PreviousRootBridgeID Indicates the bridge ID of the previous root bridge.
NewRootBridgeID Indicates the ID of the new root bridge.
RootPwName Indicates the PW name as the root port.
PreTimeVector Indicates the time before the root bridge changed.
PreHello Indicates the time of the Hello Timer before the root bridge changed.
PreMessAge Indicates the aging time of the information before the root bridge changed.
PreFwdly Indicates the forwarding delay timer before the root bridge changed.
PreMessHop Indicates the number of hops of the spanning tree before the root bridge changed.
NewTimeVector Indicates the time after the root bridge changed.
NewHello Indicates the time of the Hello Timer after the root bridge changed.
NewMessAge Indicates the aging time of the information after the root bridge changed.
NewFwdly Indicates the forwarding delay timer after the root bridge changed.
NewMessHop Indicates the number of hops of the spanning tree after the root bridge changed.

Possible Causes

Cause 1: A new device, which had the optimal bridge ID, was added.

Cause 2: The priorities of the devices or the domain configuration on the current network were modified.

Procedure

  • Cause 1: A new device, which had the optimal bridge ID, was added.
    1. Check whether the added physical link is required.

      • If the added physical link is necessary, go to Step 2.
      • If the added physical link is unnecessary, go to Step 3.

    2. Run the display stp [ process process-id ] [ instance instance-id ] [ interface interface-type interface-number | slot slot-id ] [ brief ] command to check whether the bridge ID is optimal on the entire network.

      • If the bridge ID is optimal on the entire network, go to Step 3.
      • If the bridge ID is not optimal on the entire network, go to Step 5.

    3. Check whether the bridge ID of the added device should be the optimal one on the entire network.

      • If the bridge ID of the added device should be the optimal one on the entire network, the alarm will be cleared.
      • If the bridge ID of the added device should not be the optimal one on the entire network, go to Step 4.

    4. Correctly configure the device according to the topology, and then check whether the alarm is cleared. If the alarm persists, go to Step 5.
    5. Collect trap, log, and configuration information, and contact technical support personnel.
  • Cause 2: The priorities of the devices or the domain configuration on the current network were modified.
    1. Run the display stp [ process process-id ] [ instance instance-id ] [ interface interface-type interface-number | slot slot-id ] [ brief ] command to check whether the operation of changing the vectors of the instance or the domain configuration is correct. If the operation is incorrect, go to Step 2.
    2. Correctly configure the device according to the topology, and then check whether the alarm is cleared. If the alarm persists, go to Step 3.
    3. Collect trap, log, and configuration information, and contact technical support personnel.
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Updated: 2019-04-20

Document ID: EDOC1100039602

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