BYOIP (bring your own IP)
1. BYOIP (bring your own IP)
The next topic we'll be discussing is BYOIP. Enterprises want to move their applications to the Cloud, but worry about having to swap their IP addresses for one's from their Cloud provider. We hear from our customers that managing the migration of IP addresses can be one of the most challenging aspects of a Cloud migration for network administrators. Here at Google Cloud, we now allow you to bring your own IP, or BYOIP addresses to Google's network infrastructure across all our 24 regions. By bringing over your own IP addresses, you can accelerate your migration while minimizing downtime, as well as significantly reducing your network infrastructure costs. With Google Cloud, your BYOIP prefixes can be broken into blocks as small as 16 addresses, or S/28. It can be distributed to any region, and can also be used for global load balancers, creating more flexibility with the resources you already have. You can also advertise the IP addresses you bring to Google Cloud globally to all peers. BYOIP enables customers to assign IP addresses from a public IP range that they own, to Google Cloud resources. With BYOIP, customers can route traffic directly from the Internet to their VMs without having to go through their own physical networks. After the IP addresses are imported, Google Cloud manages them in the same way as Google-provided IP addresses with these exceptions. The IP addresses are available only to the customer who brought them, and idle or in-use IP addresses incur no charges. The object that the IP address is assigned to can have a regional scope, like a VM or the forwarding rule of a network load balancer. It can also have a global scope, like the forwarding rule of a global external application load balancer. It must support an external address type, because BYOIP ranges will be advertised by Google to the public Internet. BYOIP, bring your own IP addresses, are a way to incorporate your existing static external IP addresses into Cloud environments. They are compatible with most resources that support static external IP addresses. You can leverage BYOIP addresses for Classic VPN gateway tunnels as PRIP addresses, external Google Kubernetes Engine forwarding rules, and configuring static IP addresses for VMs within state-full managed instance groups. However, there are certain limitations. BYOIP addresses cannot be used as PRIP addresses for HA VPN gateway tunnels, or as external IP addresses for VPN gateway tunnels in general. Additionally, shared VPC service projects, Google Kubernetes Engine nodes and pods, and managed instance groups with automatic IP allocation, do not support the use of BYOIP addresses. BYOIP prefixes cannot overlap with subnet or alias ranges in the VPC used by the customer. Overlapping BGP route announcements can be problematic. BGP is a routing protocol that picks the most efficient route to send a packet. If Google and another network advertise the same route with matching or mismatched prefix lengths, BGP can not work properly, you might experience unexpected routing and packet loss. For example, suppose you're advertising a 203.0.112.0/20 address block, and you're using BGP to route packets, you could bring a 203.0.112.0/23 address block that you own to Google, using BYOIP, and set it up to route externally. Because the /23 block is contained within the /20 block, BGP route announcements may overlap. If you're maintaining the routing registry correctly, BGP routing practices cause the more specific route to take precedence. Thus, the /23 block will take precedence over the /20 block. However, if the 23 route ever stopped being advertised, the /20 block could be used.2. Let's practice!
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