To Address the Space Limitation of Inner VLAN
draft-zhang-trill-vlan-extension-01
| Document | Type |
Expired Internet-Draft
(individual)
Expired & archived
|
|
|---|---|---|---|
| Author | Mingui Zhang | ||
| Last updated | 2011-06-30 | ||
| RFC stream | (None) | ||
| Intended RFC status | (None) | ||
| Formats | |||
| Stream | Stream state | (No stream defined) | |
| Consensus boilerplate | Unknown | ||
| RFC Editor Note | (None) | ||
| IESG | IESG state | Expired | |
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:
Abstract
TRILL is originally designed for customer networks. When it is used as a provider network to interconnect multiple separate users, the space of current Inner VLAN becomes insufficient. As an easy way, a new VLAN ID field is added to the Inner Ethernet frame. The new VLAN ID can be use in conjunction with the previous defined Inner VLAN. This mechanism is usually known as stacked VLANs(802.1ad, or QinQ). The stacked VLANs mechanism is analyzed in this document. The method to introduce a single longer VLAN field to current TRILL header is also analyzed in this document. In addition, a novel MAC address rewriting mechanism is also brought forward to break the space limitation of the Inner VLAN. The MAC addresses of the native frame are not used for forwarding process in transit RBridges. When the packet enters the TRILL network, the ingress RBridge (Appointed Forwarder) uses a Virtual MAC (VMAC) address to replace the real MAC and embedded the native VLAN ID into this virtual MAC address. When a packet egresses from the TRILL network, the egress RBridge will use the real MAC address to replace the virtual MAC address and deliver it to the destination on the local link.
Authors
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)