SAVI J. Bi
Internet-Draft J. Wu
Intended status: Standards Track G. Yao
Expires: November 7, 2013 Tsinghua Univ.
F. Baker
Cisco
May 6, 2013
SAVI Solution for DHCP
draft-ietf-savi-dhcp-16
Abstract
This document specifies the procedure for creating a binding between
a DHCPv4/DHCPv6 assigned IP address and a binding anchor on a SAVI
(Source Address Validation Improvements) device. The bindings set up
by this procedure can be used to filter out packets with forged
source IP address in DHCP scenario. This mechanism is proposed as a
complement to ingress filtering to provide finer-grained source IP
address validation.
Status of this Memo
This Internet-Draft is submitted in full conformance with the
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This Internet-Draft will expire on November 7, 2013.
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publication of this document. Please review these documents
Bi, et al. Expires November 7, 2013 [Page 1]
Internet-Draft SAVI DCHP May 2013
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 5
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 5
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 6
4. Deployment Scenario and Configuration . . . . . . . . . . . . 7
4.1. Elements and Scenario . . . . . . . . . . . . . . . . . . 7
4.2. Attribute . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2.1. Trust Attribute . . . . . . . . . . . . . . . . . . . 9
4.2.2. DHCP-Trust Attribute . . . . . . . . . . . . . . . . . 10
4.2.3. DHCP-Snooping Attribute . . . . . . . . . . . . . . . 10
4.2.4. Data-Snooping Attribute . . . . . . . . . . . . . . . 10
4.2.5. Validating Attribute . . . . . . . . . . . . . . . . . 11
4.2.6. Table of Mutual Exclusions . . . . . . . . . . . . . . 11
4.3. Perimeter . . . . . . . . . . . . . . . . . . . . . . . . 12
5. Binding State Table (BST) . . . . . . . . . . . . . . . . . . 13
6. DHCP Snooping Process . . . . . . . . . . . . . . . . . . . . 14
6.1. Rationale . . . . . . . . . . . . . . . . . . . . . . . . 14
6.2. Binding States Description . . . . . . . . . . . . . . . . 15
6.3. Events . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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