[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-09-04。"],[],[],null,["# Cloud Router overview\n=====================\n\nCloud Router is a distributed and fully managed offering that provides\n[Border Gateway Protocol\n(BGP)](https://en.wikipedia.org/wiki/Border_Gateway_Protocol) speaker and\nresponder capabilities.\nCloud Router works with Cloud Interconnect,\nCloud VPN, and Router appliances to create [dynamic\nroutes](/vpc/docs/routes#dynamic_routes) in VPC networks based on\nBGP-received and custom learned routes.\n\nCloud Router and the [Andromeda network virtualization stack\n(Andromeda) (PDF\ndownload)](https://www.usenix.org/system/files/conference/nsdi18/nsdi18-dalton.pdf)\nwork together. Andromeda handles all packet routing and forwarding capabilities,\nand Cloud Routers manage corresponding BGP sessions.\nCloud Routers don't provide packet routing or forwarding capability.\n\nGoogle Cloud products that use Cloud Router\n-------------------------------------------\n\nThe following table describes products that use Cloud Router:\n\nCloud NAT relies on Cloud Routers for control plane capabilities,\nbut not for BGP session management.\n\nKey features\n------------\n\nCloud Router offers the following features:\n\n- BGP session management, including support for [Bidirectional Forwarding\n Detection (BFD)](/network-connectivity/docs/router/concepts/bfd) and [MD5\n authentication](/network-connectivity/docs/router/how-to/use-md5-authentication).\n\n- [Advertised routes](/network-connectivity/docs/router/concepts/advertised-routes): advertise IP\n ranges to your network when you use a [supported\n product](#cloud-products-that-use-cloud-router).\n\n- [Learned routes](/network-connectivity/docs/router/concepts/learned-routes):\n Cloud Router uses routes received from BGP peers and custom learned\n routes to create [dynamic routes](/vpc/docs/routes#dynamic_routes) in\n VPC networks.\n\n- [BGP route policies](/network-connectivity/docs/router/concepts/bgp-route-policies-overview): BGP\n route policies let you set rules to filter BGP routes or modify BGP route\n attributes.\n\nIP protocols support\n--------------------\n\nCloud Router supports IPv6 route exchange through either of the\nfollowing:\n\n- BGP over IPv6\n- BGP over IPv4 using multiprotocol BGP (MP-BGP)\n\nFor information about advertising IPv6 prefixes, see [Advertising subnet IPv6\naddress ranges](/network-connectivity/docs/router/concepts/advertised-routes#ipv6-conditions).\n\nYou can create the following types of BGP sessions:\n\n- IPv4 BGP sessions that exchange only IPv4 prefixes\n- IPv6 BGP sessions that exchange only IPv6 prefixes\n- IPv4 BGP sessions using MP-BGP that exchange both IPv4 and IPv6 prefixes\n- IPv6 BGP sessions using MP-BGP that exchange both IPv4 and IPv6 prefixes\n\nIPv6 BGP peering and IPv6 route exchange aren't supported for the following\nresources:\n\n- Classic VPN tunnels\n- Router appliance (part of Network Connectivity Center)\n- Cross-Cloud Interconnect VLAN attachments\n\nYou can configure an IPv4 BGP session and an IPv6 BGP session simultaneously for\nan HA VPN tunnel or a Dedicated Interconnect\nVLAN attachment. When you configure both BGP sessions simultaneously, the IPv4\nBGP session only exchanges IPv4 routes, and the IPv6 BGP session only exchanges\nIPv6 routes.\n\nWhat's next\n-----------\n\n- To help build your network topology with Cloud Router, see\n [Best practices for Cloud Router](/network-connectivity/docs/router/concepts/best-practices).\n\n- To find definitions for Cloud Router terminology, see\n [Key terms](/network-connectivity/docs/router/concepts/key-terms).\n\n- [Establish BGP sessions](/network-connectivity/docs/router/how-to/configuring-bgp)\n\n- [Create an HA VPN to a peer VPN gateway](/network-connectivity/docs/vpn/how-to/creating-ha-vpn)\n\n- [Create HA VPN gateways to connect VPC\n networks](/network-connectivity/docs/vpn/how-to/creating-ha-vpn2)\n\n- [Create VLAN attachments](/network-connectivity/docs/interconnect/how-to/dedicated/creating-vlan-attachments)\n (Dedicated Interconnect).\n\n- [Configure multiprotocol BGP for IPv4 or IPv6 BGP sessions](/network-connectivity/docs/router/how-to/configuring-mp-bgp)"]]
