Example for Establishing an EVC Model

This section provides an example for establishing an EVC model to implement inter-VLAN communication.

Networking Requirements

If various communities share the same services, such as Internet, Internet Protocol Television (IPTV), and Voice Over IP (VoIP), to facilitate management, each service can be assigned a VLAN in each community. The same service may be assigned different VLANs in different communities.

On the network shown in Figure 1, community 1 and community 2 have the same services. A service of the two communities is transmitted using the same VLAN, but a service is transmitted using different VLANs in the two communities. Devices using the same service but in different VLANs in the two communities need to communicate. To meet this requirement, an EVC model can be deployed, which has a low cost.

Figure 1 Networking diagram for an EVC model

Sub-interface 2.1, sub-interface 1.1, and sub-interface 1.2 in this example represent GE 0/1/2.1, GE 0/1/1.1, and GE 0/1/1.2, respectively.

Precautions

Services in all VLANs are on the same network segment.

Configuration Roadmap

The configuration roadmap is as follows:

Assign device interfaces in community 1 to VLAN10, and assign device interfaces in community 2 to VLAN30.
Configure an EVC model on a PE:
1. Configure a bridge domain to forward services.
2. Create an EVC Layer 2 sub-interface, add it to the bridge domain, and specify traffic encapsulation types and behaviors on the EVC Layer 2 sub-interface.

Data Preparation

To complete the configuration, you need the following data:

Number of each interface connecting each device to users
Number of each interface connecting each device to another device
ID of each VLAN to which each interface belongs
Bridge domain ID

Procedure

Assign interfaces connecting each CE to users to a specified VLAN.

# Configure CE1.

<HUAWEI> system-view
[~HUAWEI] sysname CE1
[*HUAWEI] commit
[~CE1] vlan 10
[*CE1-vlan10] quit
[*CE1] interface gigabitethernet 0/1/1
[*CE1-GigabitEthernet0/1/1] undo shutdown
[*CE1-GigabitEthernet0/1/1] portswitch
[*CE1-GigabitEthernet0/1/1] port link-type access
[*CE1-GigabitEthernet0/1/1] port default vlan 10
[*CE1-GigabitEthernet0/1/1] quit
[*CE1] interface gigabitethernet 0/1/2
[*CE1-GigabitEthernet0/1/2] undo shutdown
[*CE1-GigabitEthernet0/1/2] portswitch
[*CE1-GigabitEthernet0/1/2] port link-type trunk
[*CE1-GigabitEthernet0/1/2] port trunk allow-pass vlan 10
[*CE1-GigabitEthernet0/1/2] quit
[*CE1] commit

# Configure CE2.

<HUAWEI> system-view
[~HUAWEI] sysname CE2
[*HUAWEI] commit
[~CE2] vlan batch 10 30
[*CE2] interface gigabitethernet 0/1/1
[*CE2-GigabitEthernet0/1/1] undo shutdown
[*CE2-GigabitEthernet0/1/1] portswitch
[*CE2-GigabitEthernet0/1/1] port link-type access
[*CE2-GigabitEthernet0/1/1] port default vlan 30
[*CE2-GigabitEthernet0/1/1] quit
[*CE2] interface gigabitethernet 0/1/3
[*CE2-GigabitEthernet0/1/3] undo shutdown
[*CE2-GigabitEthernet0/1/3] portswitch
[*CE2-GigabitEthernet0/1/3] port link-type access
[*CE2-GigabitEthernet0/1/3] port default vlan 10
[*CE2-GigabitEthernet0/1/3] quit
[*CE2] interface gigabitethernet 0/1/2
[*CE2-GigabitEthernet0/1/2] undo shutdown
[*CE2-GigabitEthernet0/1/2] portswitch
[*CE2-GigabitEthernet0/1/2] port link-type trunk
[*CE2-GigabitEthernet0/1/2] port trunk allow-pass vlan 10 30
[*CE2-GigabitEthernet0/1/2] quit
[*CE2] commit

Establish an EVC model.

Configure a bridge domain on each PE.

# Configure PE1.

<HUAWEI> system-view
[~HUAWEI] sysname PE1
[*HUAWEI] commit
[~PE1] bridge-domain 10
[~PE1-bd10] quit

# Configure PE2.

<HUAWEI> system-view
[~HUAWEI] sysname PE2
[*HUAWEI] commit
[~PE2] bridge-domain 10
[~PE2-bd10] quit

Create an EVC Layer 2 sub-interface on each PE, add the EVC Layer 2 sub-interface to a bridge domain, and specify traffic encapsulation and behaviors on the EVC Layer 2 sub-interface.

# Configure PE1.

[*PE1] interface gigabitethernet 0/1/1
[*PE1-GigabitEthernet0/1/1] undo shutdown
[*PE1-GigabitEthernet0/1/1] quit
[*PE1] interface gigabitethernet 0/1/1.1 mode l2
[*PE1-GigabitEthernet0/1/1.1] encapsulation dot1q vid 10
[*PE1-GigabitEthernet0/1/1.1] bridge-domain 10
[*PE1-GigabitEthernet0/1/1.1] quit
[~PE1] interface gigabitethernet 0/1/2
[*PE1-GigabitEthernet0/1/2] undo shutdown
[*PE1-GigabitEthernet0/1/2] quit
[*PE1] interface gigabitethernet 0/1/2.1 mode l2
[*PE1-GigabitEthernet0/1/2.1] encapsulation dot1q vid 10
[*PE1-GigabitEthernet0/1/2.1] bridge-domain 10
[*PE1-GigabitEthernet0/1/2.1] commit
[~PE1-GigabitEthernet0/1/2] quit

# Configure PE2.

[*PE2] interface gigabitethernet 0/1/1
[*PE2-GigabitEthernet0/1/1] undo shutdown
[*PE2-GigabitEthernet0/1/1] quit
[*PE2] interface gigabitethernet 0/1/1.1 mode l2
[*PE2-GigabitEthernet0/1/1.1] encapsulation dot1q vid 10
[*PE2-GigabitEthernet0/1/1.1] bridge-domain 10
[*PE2-GigabitEthernet0/1/1.1] quit
[*PE2] interface gigabitethernet 0/1/1.2 mode l2
[*PE2-GigabitEthernet0/1/1.2] encapsulation dot1q vid 30
[*PE2-GigabitEthernet0/1/1.2] rewrite map 1-to-1 vid 10
[*PE2-GigabitEthernet0/1/1.2] bridge-domain 10
[*PE2-GigabitEthernet0/1/1.2] quit
[~PE2] interface gigabitethernet 0/1/2
[*PE2-GigabitEthernet0/1/2] undo shutdown
[*PE2-GigabitEthernet0/1/2] quit
[*PE2] interface gigabitethernet 0/1/2.1 mode l2
[*PE2-GigabitEthernet0/1/2.1] encapsulation dot1q vid 10
[*PE2-GigabitEthernet0/1/2.1] bridge-domain 10
[*PE2-GigabitEthernet0/1/2.1] commit
[~PE2-GigabitEthernet0/1/2] quit

Verify the configuration.

After completing the configuration, run the display bridge-domain command to view bridge domain information, including the bridge domain to which an EVC Layer 2 sub-interface belongs and the bridge domain status. The following example uses the command output on PE1.

[~PE1] display bridge-domain
The total number of bridge-domains is : 1
--------------------------------------------------------------------------------
MAC_LRN: MAC learning;         STAT: Statistics;         SPLIT: Split-horizon;
BC: Broadcast;                 MC: Unknown multicast;    UC: Unknown unicast;
*down: Administratively down;  FWD: Forward;             DSD: Discard;
--------------------------------------------------------------------------------

BDID  State MAC-LRN STAT    BC  MC  UC  SPLIT   Description
--------------------------------------------------------------------------------
10    up    enable  disable FWD FWD FWD disable

Run the display ethernet uni information command to view information about traffic encapsulation types and behaviors configured on an EVC Layer 2 sub-interface. The following example uses the command output on PE2.

[~PE2] display ethernet uni information
  GigabitEthernet0/1/1.1
    Total encapsulation number: 1
      encapsulation dot1q vid 10
    No action
  GigabitEthernet0/1/1.2
    Total encapsulation number: 1
      encapsulation dot1q vid 30
    Rewrite map 1-to-1 vid 10
  GigabitEthernet0/1/2.1
    Total encapsulation number: 1
      encapsulation dot1q vid 10
    No action

With the EVC model, users in two communities can communicate across VLANs.

Configuration Files

PE1 configuration file

#
sysname PE1
#
bridge-domain 10
#
interface GigabitEthernet0/1/1
 undo shutdown
#
interface GigabitEthernet0/1/1.1 mode l2
 encapsulation dot1q vid 10
 bridge-domain 10
#
interface GigabitEthernet0/1/2
 undo shutdown
#
interface GigabitEthernet0/1/2.1 mode l2
 encapsulation dot1q vid 10
 bridge-domain 10
#
return

PE2 configuration file

#
sysname PE2
#
bridge-domain 10
#
interface GigabitEthernet0/1/1
 undo shutdown
#
interface GigabitEthernet0/1/1.1 mode l2
 encapsulation dot1q vid 10
 bridge-domain 10
#
interface GigabitEthernet0/1/1.2 mode l2
 encapsulation dot1q vid 30
 rewrite map 1-to-1 vid 10
 bridge-domain 10
#
interface GigabitEthernet0/1/2
 undo shutdown
#
interface GigabitEthernet0/1/2.1 mode l2
 encapsulation dot1q vid 10
 bridge-domain 10
#
return

CE1 configuration file

#
sysname CE1
#
vlan batch 10
#
interface GigabitEthernet0/1/1
 portswitch
 undo shutdown
 port link-type access
 port default vlan 10
#
interface GigabitEthernet0/1/2
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10
#
return

CE2 configuration file

#
sysname CE2
#
vlan batch 10 30
#
interface GigabitEthernet0/1/1
 portswitch
 undo shutdown
 port link-type access
 port default vlan 30
#
interface GigabitEthernet0/1/2
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10 30
#
interface GigabitEthernet0/1/3
 portswitch
 undo shutdown
 port link-type access
 port default vlan 10
#
return