Virtual Subnet: A L3VPN-based Subnet Extension Solution
draft-xu-l3vpn-virtual-subnet-00

The information below is for an old version of the document
Document Type Active Internet-Draft (individual)
Last updated 2013-07-15
Replaced by draft-ietf-l3vpn-virtual-subnet
Stream (None)
Intended RFC status (None)
Formats pdf htmlized (tools) htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
Network working group                                             X. Xu  
Internet Draft                                      Huawei Technologies         
Category: Informational                              
                                                               S. Hares  
                                                               
                                                                 Y. Fan 
                                                          China Telecom 
                                                           
                                                           C. Jacquenet 
                                                         France Telecom 
                                                         
Expires: January 2014                                     July 15, 2013 
                                                                                
                                      
          Virtual Subnet: A L3VPN-based Subnet Extension Solution 
                                      
                      draft-xu-l3vpn-virtual-subnet-00 

Abstract 

   This document describes a Layer3 Virtual Private Network (L3VPN)-
   based subnet extension solution referred to as Virtual Subnet, which 
   can be used as a kind of Layer3 network virtualization overlay 
   approach for data center interconnect. 

Status of this Memo 

   This Internet-Draft is submitted in full conformance with the   
   provisions of BCP 78 and BCP 79.  

   Internet-Drafts are working documents of the Internet Engineering    
   Task Force (IETF), its areas, and its working groups. Note that    
   other groups may also distribute working documents as Internet-   
   Drafts. 

   Internet-Drafts are draft documents valid for a maximum of six months 
   and may be updated, replaced, or obsoleted by other documents at any 
   time. It is inappropriate to use Internet-Drafts as reference 
   material or to cite them other than as "work in progress." 

   The list of current Internet-Drafts can be accessed at    
   http://www.ietf.org/ietf/1id-abstracts.txt. 

   The list of Internet-Draft Shadow Directories can be accessed at   
   http://www.ietf.org/shadow.html. 

 
 
 
Xu, et al.            Expires January 15, 2014                [Page 1] 


Internet-Draft               Virtual Subnet                   July 2013 
 
   This Internet-Draft will expire on January 15, 2014. 

Copyright Notice 

   Copyright (c) 2013 IETF Trust and the persons identified as the   
   document authors.  All rights reserved.  

   This document is subject to BCP 78 and the IETF Trust's Legal   
   Provisions Relating to IETF Documents   
   (http://trustee.ietf.org/license-info) in effect on the date of   
   publication of this document. Please review these documents   
   carefully, as they describe your rights and restrictions with respect 
   to this document. Code Components extracted from this document must 
   include Simplified BSD License text as described in Section 4.e of 
   the Trust Legal Provisions and are provided without warranty as 
   described in the Simplified BSD License.   

Conventions used in this document 

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", 
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this 
   document are to be interpreted as described in RFC-2119 [RFC2119]. 

Table of Contents 

   1. Introduction ................................................ 4 
   2. Terminology ................................................. 6 
   3. Solution Description......................................... 6 
      3.1. Unicast ................................................ 6 
         3.1.1. Intra-subnet Unicast .............................. 6 
         3.1.2. Inter-subnet Unicast .............................. 7 
      3.2. Multicast .............................................. 9 
      3.3. CE Host Discovery ...................................... 9 
      3.4. ARP/ND Proxy .......................................... 10 
      3.5. CE Host Mobility ...................................... 10 
      3.6. Forwarding Table Scalability .......................... 10 
         3.6.1. MAC Table Reduction on Data Center Switches ...... 10 
         3.6.2. PE Router FIB Reduction .......................... 11 
         3.6.3. PE Router RIB Reduction .......................... 12 
      3.7. ARP/ND Cache Table Scalability on Default Gateways .... 14 
      3.8. ARP/ND and Unknown Uncast Flood Avoidance ............. 14 
      3.9. Path Optimization ..................................... 14 
   4. Considerations for Non-IP traffic .......................... 15 
   5. Security Considerations .................................... 15 
   6. IANA Considerations ........................................ 15 
   7. Acknowledgements ........................................... 15 
Show full document text