No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

NE40E-M2 V800R010C10SPC500 Feature Description - LAN Access and MAN Access 01

This is NE40E-M2 V800R010C10SPC500 Feature Description - LAN Access and MAN Access
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Hybrid VLAN-based Layer 2 Protocol Tunneling Application

Hybrid VLAN-based Layer 2 Protocol Tunneling Application

When each edge device interface on a backbone network connects to more than one user network and some Layer 2 protocol data units (PDUs) from the user networks carry VLAN tags while others do not, configure hybrid VLAN-based Layer 2 protocol tunneling to allow both the tagged and untagged Layer 2 PDUs from the user networks to be tunneled across the backbone network. Layer 2 PDUs from the user networks then travel through different Layer 2 tunnels to reach the destinations to perform Layer 2 protocol calculation.

In Figure 5-10, PEs on the backbone network edge must tunnel both tagged and untagged Layer 2 PDUs from a large number of VLAN users across the backbone network.

Figure 5-10 Hybrid VLAN-based Layer 2 protocol tunneling networking

PE1, PE2, and PE3 constitute a backbone network. LAN-A and LAN-C belong to VLAN 3; LAN-B and LAN-D belong to VLAN 2. All LANs send tagged Layer 2 PDUs. CE1 can forward Layer 2 PDUs carrying VLAN 2 and VLAN 3. CE2 can forward Layer 2 PDUs carrying VLAN 3. CE3 can forward Layer 2 PDUs carrying VLAN 2. CE1, CE2, and CE3 also run an untagged Layer 2 protocol, such as LLDP.

To tunnel both tagged and untagged Layer 2 PDUs from a large number of VLAN users across the backbone network, configure hybrid tagged and hybrid untagged attributes and enable both interface-based and VLAN-based Layer 2 protocol tunneling on the user-side interfaces of PE1, PE2, and PE3.

The Layer 2 protocol tunneling process is as follows:
  1. PE1 receives tagged and untagged Layer 2 PDUs and adds the default VLAN ID of the interface that has received the untagged Layer 2 PDUs to these PDUs.

  2. PE1 replaces the multicast destination MAC address in the Layer 2 PDUs with a specified multicast MAC address based on the configured mapping between the multicast destination MAC address and the specified multicast MAC address.

  3. The internal devices on the backbone network forward the Layer 2 PDUs with a specified multicast MAC address to the egress devices.

  4. The egress devices PE2 and PE3 restore the original destination MAC address in the Layer 2 PDUs based on the configured mapping between the multicast destination MAC address and the specified multicast address. They also remove the outer VLAN tags and send the Layer 2 PDUs to the user networks.

Download
Updated: 2019-01-02

Document ID: EDOC1100058405

Views: 16417

Downloads: 18

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next