使用现代网络理念构造开放数据中心.pdf

1、NVIDIAOPEN DATA CENTER WITHCLOS8CUMULUSGTC China，Dec 2020#page#AGENDACLOS and BGP FundamentalsHow should it work？iBGP VS eBGPWhat BGP hammer to useBGP ConfigurationHowtomakeitworkRouting on HostA new solution for DC networkNetwork is a ServerCumulus Linux Inttroductiion#page#BGP FUNDAMENTALS#page#BG

2、P ON CUMULUS LINUXMultiprotocol supportSupports IPv4，IPv6，L2VPN-EVPNImplemented in the FRR routing suite in Cumulus LinuxHigh PerformanceProductiion in thousands of customers#page#AUTONOMOUS SYSTEM NUMBER (ASN）Each AS is uniquely identified by its ASN.Global AS assigned by a central authority CIANA）

3、Included as part of the BGP route advertisementPublic 2 byte and 4 byte ASNReserved 2 byte private range of 64512-65534 （1023）Reserved 4 byte private range of 4200000000-4294967294 （-94 million）BGP Adiacengy10.1.0.0/31Hcfd01:/127ASN:65000ASN:65001#page#BGP BEHAVIORAn AS originates their routes into

4、BGPBGP peers with other BGP speakersUses TCP port 179BGP peers exchange routesPicks the best pathInstalls in the forwarding tableAdvertises to BGP peers via UPDATESUPDATEs have AttributesAS path，communities， extended communities，etc172.16.1.101/32H主172.16.1.101AS65001Server01=AS65011#page#EBGP VS.IB

5、GPExternal BGP (eBGP） neighbors peer with different ASNSInternal BGP GiBGP） neighbors peer with the same ASNseBGPiBGPH主HTAS65011AS65020AS65020AS65020#page#TRADITIONAL BGP VS DATA CENTER EBGPSpine-Leaf NetworkAcross InternetCompany ACompany BAS11111AS22222AS65000AS65000Internet /THE888608Service Prov

6、iderAS65011AS65012AS65013AS65014AS 65000Company DCompany CAS44444AS33333#page#TRADITIONAL BGP VS DATA CENTER IBGPSpine-Leaf NetworkAcross InternetCompany ACompany BAS11111AS22222AS65000AS65000Internet /Service ProviderAS65000AS65000AS65000AS65000AS 65000Company DCompany CAS44444AS33333#page#IBGP CON