ccc

Format

ccc [ ip-interworking ] ccc-connection-name interface { interface-type1 | interface-type1 interface-number1 } [ access-port ] [ interface-number1 ] out-interface { interface-type2 | interface-type2 interface-number2 } [ access-port ] [ interface-number2 ] [ jitter-buffer depth | idle-code idle-code-value ] ^*

undo ccc [ ip-interworking ] ccc-connection-name

Parameters

Parameter	Description	Value
ip-interworking	Enables IP interworking for a local CCC connection.	-
ccc-connection-name	Specifies a CCC connection name that uniquely identifies a CCC connection on a PE.	The value is a string of 1 to 31 case-sensitive characters, spaces not supported. The string can contain spaces if it is enclosed in double quotation marks (").
interface interface-name1	Specifies the name of the AC interface connected to a CE.	-
interface-type1	Specifies the type of the AC interface connected to a CE.	-
interface-number1	Specifies the number of the AC interface connected to a CE.	-
access-port	Specifies that only untagged packets can be forwarded. By default, all packets can be forwarded. This parameter applies only to Ethernet main interfaces.	-
raw	Sets the encapsulation type on the AC interface to raw.	-
out-interface interface-name2	Specifies the name of the AC interface connected to the other CE.	-
interface-type2	Specifies the type of the AC interface connected to the other CE.	-
interface-number2	Specifies the number of the AC interface connected to the other CE.	-
outraw	Sets the encapsulation type on the AC interface to tagged.	-
jitter-buffer depth	Specifies the depth of the jitter buffer, that is, the maximum jitter delay allowed. The deeper the jitter buffer is, the greater the capabilities against the jitter. A deep jitter buffer, however, may cause a long delay when data streams are reestablished. Therefore, only an appropriate jitter buffer can ensure quality transmission of services.	The value is an integer ranging from 1 to 64, in milliseconds. The default value is 4.
idle-code idle-code-value	Specifies the idle code that is filled in manually when the jitter buffer underflow occurs. Underflow refers to the situation where there are insufficient packets in the jitter buffer to be forwarded. The idle code has no significance, and can be set to any value.	The value ranges from FF to FF, in hexadecimal notation. The default value is FF.

Views

System view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
l2vpn	write

Usage Guidelines

Usage Scenario

VPWS in CCC mode applies to small MPLS networks with simple topologies. It needs neither signaling negotiation nor control packet exchange. Therefore, it consumes fewer resources and is easy to understand. However, it is inconvenient for maintenance, requires manual configuration of the administrator, and has poor scalability.

Two CEs connected to the same PE can communicate with each other using a local CCC connection established between the two CEs.

Prerequisites

MPLS L2VPN has been enabled.

Configuration Impact

An interface cannot serve as both an L2VPN AC interface and an L3VPN AC interface at the same time. If an interface is bound to an L2VPN, its Layer 3 features such as the IP address and routing protocol will not take effect. If an interface is bound to an L2VPN and an L3VPN at the same time, only the L2VPN connection is available. The L3VPN connection becomes available after the interface is unbound from the L2VPN.

Precautions

A local CCC connection is bidirectional and therefore only one connection is required.
A sub-interface that is bound to a VPWS can be deleted only after it is unbound from the VPWS.
raw and tagged can be specified in the ccc interface out-interface command only when the CCC connection is established on an Ethernet link and IP interworking is not configured.
By default, the encapsulation type on Ethernet main interfaces and Ethernet sub-interfaces is raw.

Example

# Create a local CCC connection between two CEs connected to the same PE.

<HUAWEI> system-view
[~HUAWEI] mpls lsr-id 1.1.1.1
[*HUAWEI] mpls
[*HUAWEI-mpls] quit
[*HUAWEI] mpls l2vpn
[*HUAWEI-l2vpn] quit
[*HUAWEI] ccc ccc-connect-1 interface GigabitEthernet 0/1/0 out-interface GigabitEthernet 0/1/1

ccc