The problem of STP instance

DDSN · Created Dec 26, 2019 12:38:10

Hi, user_3357613
The STP instance is a concept in the MSTP region. Multiple switches form an MSTP region. A region can contain multiple instances. By default, all VLANs belong to instance 0. You can run the instance 1 vlan 10 20 command to add VLAN 10 20 to instance 1.
Problem 1: Instance 0 and instance 1 are two different instances.
Problem 2: The purpose of VLAN division is to isolate different broadcast domains. Therefore, traffic of the same VLAN must pass through different switches. The VLAN must exist on both switches. If a VLAN does not exist, traffic cannot be forwarded, not to mention instances.
For example, VLAN 372 400 418 423 426 3591 exists on both the active and standby nodes. By default, VLAN 372 400 418 423 426 3591 is in instance 0. You can specify which VLANs are in which instances.

DDSN · Created Dec 26, 2019 12:38:10

Hi, user_3357613
The STP instance is a concept in the MSTP region. Multiple switches form an MSTP region. A region can contain multiple instances. By default, all VLANs belong to instance 0. You can run the instance 1 vlan 10 20 command to add VLAN 10 20 to instance 1.
Problem 1: Instance 0 and instance 1 are two different instances.
Problem 2: The purpose of VLAN division is to isolate different broadcast domains. Therefore, traffic of the same VLAN must pass through different switches. The VLAN must exist on both switches. If a VLAN does not exist, traffic cannot be forwarded, not to mention instances.
For example, VLAN 372 400 418 423 426 3591 exists on both the active and standby nodes. By default, VLAN 372 400 418 423 426 3591 is in instance 0. You can specify which VLANs are in which instances.

The problem of STP instance

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The problem of STP instance

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