• Author : Patrik Olsson

 
 

BGP peering configuration examples for service providers

Service providers proficiently use BGP to deliver their services to their customers and communicate witht their peers. This article features some design considerations and configuration examples to try to showcase how a service provider could use BGP and other functionality to operate their networks. 1 BGP peering configuration example for service providers 1.1 Service provider edge A typical service provider edge will be running one or more several peers connecting the SP to its customers and other SPs. This type of autonomous systems is called transit AS. The role of this type of network is to aggregate neighboring networks to...
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Internet BGP peering examples for enterprises

Enterprises seeking redundancy for their Internet connetivity and agility to change service provider when needed, greatly benefit from having their own AS number and IP addresses that can be announced using their own BGP routers. This article features some design considerations and configuration to achieve this in a common enterprise scenario. 1 Internet BGP peering examples for enterprises 1.1 Enterprise edge A typical use case of BGP for an enterprise is to create a possibility to have redundant SPs as Internet uplinks and have its own private IP range (PI) that does not belong to any SP (addresses that belongs...
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BGP primer for Internet peering

Internet is not one single network, it consists of a number of networks owned and operated by different commercial and non-commercial entities. Each network is considered its own autonomous system. To separate the networks from each other, each network has a number called autonomous system number (AS number). The delegation of AS numbers is done by the organizations ARIN (Americas), RIPE (Europe) and APIC (APAC). These organization also delegate IP addresses that each AS is allowed to use. To exchange routing information for IP addresses between each AS, a protocol is needed, aswell as a router with the role to...
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Automating L3 EVPN instances deployment using CloudVision Portal

The intention of this article is to show how CloudVision Portal can be used to deploy L3 EVPN instances on one switch, or many switches, using a CloudVision Portal configlet builder. A complete demonstration of how CloudVision Portal is used to deploy an EVPN instance and EVPN fabric can be found here The configlet builder example provided on the GitHub Arista repo covers L3 EVPN deployments using physical interfaces as SVI as CE facing interface. The configlet builder example can be used on top of any EVPN underlay and overlay. Below is a step by step procedure which describes how to import...
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Deploying L2 and L3 services with Multiple Tenants on a Single Interface

The intention of this post is to provide a configuration example on how multiple tenants could be deployed on a single physical interface with a mix of multiple L2 and L3 EVPN services. Ponder the network in below diagram, where two EVPN end point switches have multiple tenants (Tenant A, B, C and D) connected on the same physical interface. The interface in this case is Ethernet3, at the respective sites. Tenant A and B want L2 EVPN services. Tenant C and D want L3 EVPN services. Please note that the IP core in the diagram could be a spine...
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Automating EVPN fabric deployment using CVP

To simplify and speed up the deployment of an EVPN fabric, CloudVision Portal can be a powerful tool to work with. The intention of this post is to divide this up into steps to simplify, qualify the actions steps needed and provide an example CloudVision Portal configlet builder to execute needed tasks in CloudVision. A complete demonstration of how CloudVision Portal is used to deploy an EVPN instance and EVPN fabric can be found here First of all, there needs to be a decision of which deployment model of EVPN underlay and overlay that suits the particular deployment being worked on....
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Automating L2 EVPN instances deployment using CloudVision Portal

The intention of this article is to show how CloudVision Portal can be used to deploy L2 EVPN instances on one switch, or many switches, using a CloudVision Portal configlet builder. A complete demonstration of how CloudVision Portal is used to deploy an EVPN instance and EVPN fabric can be found here The configlet builder example provided at GitHub Arista repo covers L2 EVPN deployments using MLAG, single interface, VLAN trunk, access VLAN, symmetric routing and asymmetric routing. The configlet builder example can be used on top of any EVPN underlay and overlay. Below is a step by step procedure is...
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