Source-Group Tag eXchange Protocol (SXP)
draft-smith-kandula-sxp-01
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Michael Smith
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Rakesh Kandula
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2014-08-08
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Network Working Group M. Smith
Internet-Draft R. Kandula
Intended status: Informational Cisco Systems
Expires: February 9, 2015 August 08, 2014
Source-Group Tag eXchange Protocol (SXP)
draft-smith-kandula-sxp-01
Abstract
This document discusses source-group tag exchange protocol (SXP), a
control protocol to propagate IP address to Source Group Tag (SGT)
binding information across network devices.
Requirements Language
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 [RFC2119].
Status of this Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79. This document may not be modified,
and derivative works of it may not be created, except to format it
for publication as an RFC or to translate it into languages other
than English.
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This Internet-Draft will expire on February 9, 2015.
Copyright Notice
Copyright (c) 2014 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
Smith & Kandula Expires February 9, 2015 [Page 1]
Internet-Draft Source-Group Tag eXchange Protocol (SXP) August 2014
(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
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described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 4
2. SXP Overview . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. SXP Operation . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. SXP Connection Management . . . . . . . . . . . . . . . . 5
3.1.1. SXP Connection . . . . . . . . . . . . . . . . . . . . 5
3.1.2. SXP Message integrity/authenticity . . . . . . . . . . 6
3.1.3. SXP Connectivity Discovery and Connection Recovery . . 6
3.1.4. SXP Connection Setup Sequence . . . . . . . . . . . . 7
3.1.5. SXP Connection States . . . . . . . . . . . . . . . . 7
3.2. Binding Database . . . . . . . . . . . . . . . . . . . . . 8
3.2.1. SXP Learned IP-SGT Binding recovery . . . . . . . . . 9
4. Message Formats . . . . . . . . . . . . . . . . . . . . . . . 9
4.1. Bit and Octet Numbering Convention . . . . . . . . . . . . 9
4.2. SXP Message Header . . . . . . . . . . . . . . . . . . . . 9
4.3. Attribute Formats . . . . . . . . . . . . . . . . . . . . 10
4.4. SXP OPEN and OPEN_RESP Message . . . . . . . . . . . . . . 12
4.4.1. Capabilities Advertisement . . . . . . . . . . . . . . 13
4.4.2. Keepalive and Hold Time Negotiation . . . . . . . . . 16
4.5. SXP UPDATE Message . . . . . . . . . . . . . . . . . . . . 21
4.5.1. UPDATE Attributes . . . . . . . . . . . . . . . . . . 22
4.5.2. UPDATE Message Samples . . . . . . . . . . . . . . . . 30
4.6. SXP ERROR Message . . . . . . . . . . . . . . . . . . . . 33
4.6.1. Error Codes . . . . . . . . . . . . . . . . . . . . . 34
4.7. SXP PURGE-ALL Message . . . . . . . . . . . . . . . . . . 35
4.8. SXP KEEPALIVE Message . . . . . . . . . . . . . . . . . . 35
5. Update Message Handling . . . . . . . . . . . . . . . . . . . 35
5.1. UPDATE Message Validation . . . . . . . . . . . . . . . . 35
5.2. UPDATE Message processing . . . . . . . . . . . . . . . . 37
5.3. Generating UPDATE Message . . . . . . . . . . . . . . . . 41
6. SXP Failure Scenarios . . . . . . . . . . . . . . . . . . . . 42
7. SXP Timers . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8. SXP Version Negotiation . . . . . . . . . . . . . . . . . . . 45
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