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Today many large-scale data centers host applications generating Replacing the device with one with higher port density. by upgrading the device's linecards or fabrics or If moreīandwidth was required, it was added by "scaling up" the networkĮlements, e.g. Oversubscription ratios between the layers of the network. Were sufficient to accommodate such flows, even with high Majority of traffic entering and leaving the data center, commonly
Until recently it was quite common to see the Large number of servers is to accommodate application bandwidth and The primary requirement when building an interconnection network for This section describes and summarizes network design requirements for Internet-Draft draft-ietf-rtgwg-bgp-routing-large-dc August 2015 2. Requirements and the proposed design is described in detail.įinally, this document reviews some additional considerations and Topology as the most appropriate routing protocol to meet the This is followed by arguments for selecting EBGP with a Clos Traditional hierarchical data center network topologies areĬontrasted with Clos networks that are horizontally scaled Requirements and considerations for large-scale data centers. This document first presents an overview of network design This document elaborates on the requirements that led to this designĬhoice and presents details of the EBGP routing design as well as Rely on extending Layer 2 domains across multiple network devices. More traditional DC designs, which may use simple tree topologies and (EBGP) is well suited as a stand-alone routing protocol for Network stability so that a small group of people can effectivelyĮxperimentation and extensive testing has shown that External BGP Requirements in such an environment are operational simplicity and
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Software infrastructure, such as a Web search engine. The design presented in this document is based on operationalĮxperience with data centers built to support large-scale distributed Networking designs and platforms to address this need. In order toĪccommodate networks of this scale, operators are revisiting Known as hyper-scale or warehouse-scale data centers, have a uniqueĪttribute of supporting over a hundred thousand servers. In a large-scale data center ("DC") design. This document describes a practical routing design that can be used Route Summarization within Clos Topology. Internet-Draft draft-ietf-rtgwg-bgp-routing-large-dc August 2015 8.1. EBGP Configuration Guidelines and Example ASN Scheme 15ĥ.2.2. Managing the Size of Clos Topology Tiers. The Trust Legal Provisions and are provided without warranty asġ.
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Include Simplified BSD License text as described in Section 4.e of
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Code Components extracted from this document must Please review these documentsĬarefully, as they describe your rights and restrictions with respect Internet-Draft draft-ietf-rtgwg-bgp-routing-large-dc August 2015 This document is subject to BCP 78 and the IETF Trust's Legal This Internet-Draft will expire on February 29, 2016.Ĭopyright (c) 2015 IETF Trust and the persons identified as the Material or to cite them other than as "work in progress." It is inappropriate to use Internet-Drafts as reference Internet-Drafts are draft documents valid for a maximum of six monthsĪnd may be updated, replaced, or obsoleted by other documents at any Note that other groups may also distribute Internet-Drafts are working documents of the Internet Engineering
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This Internet-Draft is submitted in full conformance with the Report on a proven and stable routing design that could be leveraged Operational experience in designing and operating large-scale dataĬenters using BGP as the only routing protocol. Set of network requirements with an emphasis on operational In this document, such dataĬenters are referred to as "large-scale" to differentiate them from Some network operators build and operate data centers that support Use of BGP for routing in large-scale data centers draft-ietf-rtgwg-bgp-routing-large-dc-07
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