[SAVA] SAVA and Multihoming
denghui02 at gmail.com (Hui Deng) Thu, 31 May 2007 04:38 UTC
From: "denghui02 at gmail.com"
Date: Thu, 31 May 2007 12:38:48 +0800
Subject: [SAVA] SAVA and Multihoming
Message-ID: <1d38a3350705302138n2b72c5a2qc0a7e4dc8af7adc6@mail.gmail.com>
Hello? all
based on the discussion with Ferg of the below,
I also put down this draft as the reference for this bof,
many thanks
-Hui
Hui,
I think these should be worked on, refined, and submitted on their own.
The original SAVA "problem statement" draft is just making the case
for why SAVA needs to be done, not in addressing other problems that
it will have to address along the way. :-)
That's why I think they need to be separate drafts.
If you agree, please forward these to the mailing list for comment,
along my remarks (if you would like to do so).
Thanks!
- - ferg
SAVA BoF H. Deng
Internet-Draft Hitachi
Intended status: Standards Track May 28, 2007
Expires: November 29, 2007
Problem Statement for SAVA Multihome
draft-deng-sava-multihoming-problem-statement-00.txt
Status of this Memo
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This Internet-Draft will expire on November 29, 2007.
Copyright Notice
Copyright (C) The IETF Trust (2007).
Deng Expires November 29, 2007 [Page 1]
Internet-Draft SAVA Multihome Problem Statement May 2007
Abstract
This document specifies the problems for the SAVA (Source Address
Verification Architecture) regarding to multihoming issue. The
packets coming from the multihoming location may have two different
AS numbers, this will be a issue for inter-domain source address
verification.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Problems about Multihoming in the Inter-domain SAVA
architecture . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. Security Considerations . . . . . . . . . . . . . . . . . . . 7
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.1. Normative References . . . . . . . . . . . . . . . . . . . 9
6.2. Informative References . . . . . . . . . . . . . . . . . . 9
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 10
Intellectual Property and Copyright Statements . . . . . . . . . . 11
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Internet-Draft SAVA Multihome Problem Statement May 2007
1. Introduction
In the current SAVA BOF proposal[SAVA-FRAMEWORK], the architecture
has been categorized into three type of defense: access network,
intra-domain, and inter-domain. When a host is located in
multihoming scenario, the packet coming from this host may go through
two different network access providers. In this case, the AS number
with this host may have two. And current SAVA only assume the packet
coming from one AS number.
This document defines a problem with inter-domain SAVA about
multihoming issue.
Deng Expires November 29, 2007 [Page 3]
Internet-Draft SAVA Multihome Problem Statement May 2007
2. Terminology
It is assumed that the reader is familiar with the terminology used
in [RFC1654], [RFC2827]. In addition, the following terms are
defined:
The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in BCP 14, [RFC2119].
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3. Problems about Multihoming in the Inter-domain SAVA architecture
A multihoming host in SAVA network architecture may have two AS
numbers which may conflict with SAVA inter-domain solution.
In this network architecutre, as the Figure 1, the host A have two
network access connnection: ISP 1 which has network prefix a.b.c.0/24
and ISP 2 which has network prefix d.e.f.0/24, if host A follow the
case of load balance which could enhance multihoming service. the
packet from host A could go through left side router which is SAVA
supported and the other router which is SAVA supported too, but the
top BGP router will find that packet will have two type AS number
label but come from the same network address host A. SAVA may discard
the packet where come late than previous and think it is a kind of
malicuous attack
+----------+
| Provider |
| |
|m.n.o.0/24|
+----------+
|
|
+----------+
|BGP Router|
+--------|(SAVA |--------+
| | Support) | |
|AS x +----------+ |AS y
| |
+----------+ +----------+
|BGP Router| |BGP Router|
|(SAVA | | (SAVA |
| Support) | | Support) |
+----------+ +----------+
| |
| |
+----------+ +----------+
| ISP 1 | | ISP 2 |
| Network | | Network |
|a.b.c.0/24| |d.e.f.0/24|
+----------+ +----------+
| |
| +-----------+ |
| | Host A | |
+-------| |--------+
|Multihoming|
+-----------+
Deng Expires November 29, 2007 [Page 5]
Internet-Draft SAVA Multihome Problem Statement May 2007
Figure 1: SAVA Inter-domain Network Architecture for Multihoming
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4. Security Considerations
This specification operates in the security constraints and
requirements of about some events and provides the same level of
security for all three nodes.
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5. IANA Considerations
This document provides the problem description for an Inter-domain
SAVA network architecture, BGP based routing protocol
Deng Expires November 29, 2007 [Page 8]
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6. References
6.1. Normative References
[RFC1654] Rekhter, Y. and T. Li, "A Border Gateway Protocol 4
(BGP-4)", RFC 1654, July 1994.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2827] Ferguson, P. and D. Senie, "Network Ingress Filtering:
Defeating Denial of Service Attacks which employ IP Source
Address Spoofing", BCP 38, RFC 2827, May 2000.
[RFC3871] Jones, G., "Operational Security Requirements for Large
Internet Service Provider (ISP) IP Network
Infrastructure", RFC 3871, September 2004.
6.2. Informative References
[SAVA-E2E]
Wu, JP., "A End-to-end Source Address Validation Solution
for IPv6", Feb 2007,
<draft-wu-sava-solution-e2e-ipv6-00(work in progress)>.
[SAVA-FRAMEWORK]
Wu, JP., "Source Address Validation Architecture (SAVA)
Framework", Feb 2007, <draft-wu-sava-framework-00(work in
progress)>.
[SAVA-PS] Wu, JP., "Source Address Validation Architecture Problem
Statement", Feb 2007,
<draft-sava-problem-statement-00(work in progress)>.
[SAVA-SIMPLE]
Baker, F., "Simple Source Address Validation", March 2007,
<draft-baker-sava-simple-00(work in progress)>.
[SAVA-TESTBED]
Wu, JP., "SAVA Testbed and Experiences to Date", Feb 2007,
<draft-wu-sava-testbed-experience-00(work in progress)>.
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Author's Address
Hui Deng
Hitachi
301, North Building, Tower C, Raycom Infotech Park,
2, Kexueyuan Nanlu
Hai Dian District
Beijing 100080
China
Email: hdeng at hitachi.cn
- [SAVA] SAVA and Multihoming Hui Deng