virtual-channel

Function

The virtual-channel enable command configures the virtual channel (VC) mode for RAPS PDU transmission in a sub-ring.

The virtual-channel disable command configures the non-virtual-channel (NVC) mode for RAPS PDU transmission in a sub-ring.

The undo virtual-channel enable command configures the non-virtual-channel (NVC) mode for RAPS PDU transmission in a sub-ring.

By default, RAPS PDUs are transmitted in NVC mode in a sub-ring.

Format

virtual-channel { enable | disable }

undo virtual-channel enable

Parameters

Parameter	Description	Value
enable	Enables the VC mode for RAPS PDU transmission in a sub-ring.	-
disable	Disables the VC mode for RAPS PDU transmission in a sub-ring. That is, the NVC mode is used.	-

Views

ERPS ring view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

ERPSv2 supports both single- and multi-ring topologies.

In multi-ring topologies, the VC or NVC mode can be used to transmit RAPS PDUs in a sub-ring:

VC mode: RAPS PDUs in a sub-ring are transmitted to the major ring by the intersecting node. The RPL owner port of the sub-ring blocks both RAPS PDUs and data traffic.
NVC mode: RAPS PDUs in a sub-ring are terminated on the intersecting nodes. The RPL owner port of the sub-ring blocks data traffic but not RAPS PDUs.

You can run the virtual-channel command to configure the RAPS PDU transmission mode in a sub-ring.

Prerequisites

The version v2 command has been executed to specify ERPSv2.
The sub-ring command has been executed to configure an ERPS ring as a sub-ring.

Configuration Impact

If a sub-ring uses the VC mode to transmit RAPS PDUs, you must run the virtual-channel disable or undo virtual-channel enable command to restore the RAPS PDU transmission mode to NVC before running the undo sub-ring command to restore the sub-ring to a major ring.

Example

# Configure the VC mode for RAPS PDU transmission in ERPS sub-ring 5.

<HUAWEI> system-view
[HUAWEI] erps ring 5
[HUAWEI-erps-ring5] version v2
[HUAWEI-erps-ring5] sub-ring
[HUAWEI-erps-ring5] virtual-channel enable