4/11/2023 0 Comments Best trace ipipConfigure IP in IP encapsulation for only cross subnet traffic.However, you cannot mix encapsulation types within an IP pool. You can configure each IP pool with different encapsulation configurations. Calico can perform encapsulation on: all traffic, no traffic, or only on traffic that crosses a subnet boundary. Cross subnetĮncapsulation of workload traffic is typically required only when traffic crosses a router that is unable to route workload IP addresses on its own. However, VXLAN has a slightly higher per-packet overhead because the header is larger. VXLAN is supported in some environments where IP in IP is not (for example, Azure). Encapsulation typesĬalico supports two types of encapsulation: VXLAN and IP in IP. This is why Calico supports encapsulation, so you can send traffic between workloads without requiring the underlying network to be aware of workload IP addresses. For example, public cloud environments where you don’t own the hardware, AWS across VPC subnet boundaries, and other scenarios where you cannot peer Calico over BGP to the underlay, or easily configure static routes. However, not all networks are able to route workload IP addresses. As such, they can route unencapsulated traffic to the right host for the endpoint that is the ultimate destination. Networks become aware of workload IP addresses through layer 3 routing techniques like static routes or BGP route distribution, or layer 2 address learning. ipipMode field (IP in IP encapsulation).This how-to guide uses the following features: You might also decide to run your entire Calico network with encapsulation as an overlay network – as a quick way to get started without setting up BGP peering or other routing information in your underlying network. In this case, Calico can selectively encapsulate only the traffic that is routed between the VPCs/subnets, and run without encapsulation within each VPC/subnet. A common example is if you are using Calico networking in AWS across multiple VPCs/subnets. However, selectively using overlays/encapsulation can be useful when running on top of an underlying network that cannot easily be made aware of workload IPs. This gives you the highest performance and simplest network the packet that leaves your workload is the packet that goes on the wire. In general, we recommend running Calico without network overlay/encapsulation. However, due to so many devices connecting to the internet, a newer standard has been finalized to allow even more connections - that is IPv6.Enable inter workload communication across networks that are not aware of workload IPs. This allows ~4,294,967,296 different IP-addresses to be assigned to different devices (and yes, that's a lot). The standard of IP-addresses has been IPv4 for quite long, which, in a human readable format, consists of four numbers, each ranges from 0 to 255: e.g. In fact, not only web servers but any online device can be identified with this method, and allowing us to look up some basic information about the IP-address you provided. , that is called a DNS-query), and upon receiving information about it, your browser can connect to the right server, downloading contents of the site. When you open a website, you send out a query to find your website (e.g. How does work? Every device on a network is identified using a unique address called IP-address (IP means Internet Protocol).
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