tc-notify erps ring

Function

The tc-notify erps ring command configures an ERPS ring to notify other ERPS rings of its topology change.

The undo tc-notify erps ring command disables the topology change notification function.

By default, an ERPS ring does not notify other ERPS rings of its topology change.

Format

tc-notify erps ring { ring-id1 [ to ring-id2 ] } &<1-10>

undo tc-notify erps ring { ring-id1 [ to ring-id2 ] } &<1-10>

Parameters

Parameter	Description	Value
ring-id1	Specifies the ID1 of an ERPS ring.	The value is an integer ranging from 1 to 255. The value of <ring-id2> must be greater than or equal to <ring-id1>.
to ring-id2	Specifies the ID2 of an ERPS ring.	The value is an integer ranging from 1 to 255. The value of <ring-id2> must be greater than or equal to <ring-id1>.

Parameter

Description

Value

ring-id1

Specifies the ID1 of an ERPS ring.

The value is an integer ranging from 1 to 255.

The value of <ring-id2> must be greater than or equal to <ring-id1>.

to ring-id2

Specifies the ID2 of an ERPS ring.

The value is an integer ranging from 1 to 255.

The value of <ring-id2> must be greater than or equal to <ring-id1>.

Views

ERPS ring view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
erps	write

Usage Guidelines

Usage Scenario

If an upper-layer Layer 2 network is not notified of the topology change in an ERPS ring, the MAC address entries remain unchanged on the upper-layer network and therefore user traffic is interrupted. To ensure traffic transmission, run the tc-notify erps ring command so that an ERPS ring can notify specific rings of its topology change.

Prerequisites

The version v2 command has been run to specify ERPSv2.

Configuration Impact

After the ERPS rings receive the topology change notification from an ERPS ring, they send Flush forwarding database (Flush-FDB) messages on their separate rings to instruct their nodes to update MAC addresses so that user traffic is not interrupted.

If the tc-notify erps ring command is run more than once, all configurations take effect.

Precautions

If an ERPS ring topology changes, the ERPS ring notifies the specified ERPS rings of its topology change. If the ERPS ring that has been specified to receive the topology change notification does not exist, the configuration does not take effect.

Example

# Configure ERPS ring 5 to notify ERPS rings 1 through 3 of its topology change.

<HUAWEI> system-view
[~HUAWEI] erps ring 5
[*HUAWEI-erps-ring5] version v2
[*HUAWEI-erps-ring5] tc-notify erps ring 1 to 3