Gateway Auto-Discovery and Route Advertisement for Segment Routing Enabled Data Center Interconnection
draft-drake-bess-datacenter-gateway-01
BESS Working Group J. Drake
Internet-Draft A. Farrel
Intended status: Informational E. Rosen
Expires: December 18, 2016 Juniper Networks
June 16, 2016
Gateway Auto-Discovery and Route Advertisement for Segment Routing
Enabled Data Center Interconnection
draft-drake-bess-datacenter-gateway-01
Abstract
Data centers have become critical components of the infrastructure
used by network operators to provide services to their customers.
Data centers are attached to the Internet or a backbone network by
gateway routers and one data center typically has more than one
gateway for commercial, load balancing, and resiliency reasons.
Segment routing is a popular protocol mechanism for operating within
a data center, but also for steering traffic that flows between two
data center sites. In order that one data center site may load
balance the traffic it sends to another data center site it needs to
know the complete set of gateway routers at the remote data center,
the points of connection from those gateways to the backbone network,
and the connectivity across the backbone network.
This document defines a mechanism using the BGP Tunnel Encapsulation
attribute to allow each gateway router to advertise the routes to the
prefixes in the data center site to which it provides access, and
also to advertise on behalf of each other gateway to the same data
center site.
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 RFC 2119 [RFC2119].
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). Note that other groups may also distribute
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Drake, et al. Expires December 18, 2016 [Page 1]
Internet-Draft SR DC Gateways June 2016
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This Internet-Draft will expire on December 18, 2016.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. DC Gateway Auto-Discovery . . . . . . . . . . . . . . . . . . 4
3. Relationship to BGP Link State and Egress Peer Engineering . 5
4. Advertising a DC Route Externally . . . . . . . . . . . . . . 6
5. Encapsulation . . . . . . . . . . . . . . . . . . . . . . . . 6
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
7. Security Considerations . . . . . . . . . . . . . . . . . . . 7
8. Manageability Considerations . . . . . . . . . . . . . . . . 7
9. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 7
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 7
11.1. Normative References . . . . . . . . . . . . . . . . . . 7
11.2. Informative References . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8
1. Introduction
Data centers (DCs) have become critical components of the
infrastructure used by network operators to provide services to their
customers. DCs are attached to the Internet or a backbone network by
gateway routers (GWs) and one DC typically has more than one GW for
various reasons including commercial preferences, load balancing, and
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