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 start ring ID of the ERPS ring that will be notified of the topology change.	The value is an integer that ranges from 1 to 255.
to ring-id2	Specifies the end ring ID of the ERPS ring that will be notified of the topology change. ring-id1 and ring-id2 specify a ring range. If to ring-id2 is not specified, an ERPS ring notifies only the ERPS ring specified by ring-id1 of its topology change. NOTE: You can specify the ring range for a maximum of 10 times, and the ring ranges can overlap.	The value is an integer that ranges from 1 to 255 and must be greater than or equal to ring-id1.

Parameter

Description

Value

ring-id1

Specifies the start ring ID of the ERPS ring that will be notified of the topology change.

The value is an integer that ranges from 1 to 255.

to ring-id2

Specifies the end ring ID of the ERPS ring that will be notified of the topology change.

ring-id1 and ring-id2 specify a ring range. If to ring-id2 is not specified, an ERPS ring notifies only the ERPS ring specified by ring-id1 of its topology change.

NOTE:

You can specify the ring range for a maximum of 10 times, and the ring ranges can overlap.

The value is an integer that ranges from 1 to 255 and must be greater than or equal to ring-id1.

Views

ERPS ring view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When the topology of the local ERPS ring changes and other ERPS rings is not notified of the topology change, the MAC address entries remain unchanged on the other ERPS rings and therefore user traffic is interrupted. To ensure nonstop traffic transmission, run the tc-notify erps ring command to specify ERPS rings to which topology change notifications are sent.

Prerequisites

The version v2 command has been executed to specify ERPSv2.

Precautions

The tc-notify erps ring command takes effect only on ERPS sub-rings.
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.
After other ERPS rings receive the topology change notification from an ERPS ring, they send Flush-FDB messages on their separate rings to instruct their nodes to update MAC addresses. This ensures nonstop traffic transmission.
If the tc-notify erps ring command is run more than once, all configurations 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] tc-notify erps ring 1 to 3