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Questions tagged [bgp]

BGP (Border Gateway Protocol) is one of the core routing protocols of the internet.

BGP (Border Gateway Protocol) is a protocol for exchanging routing information between gateway hosts (each with its own router) in a network of autonomous systems.

BGP is known as a path-vector protocol, the routing table contains a list of known routers, the addresses they can reach, and a cost metric associated with the path to each router so that the best available route is chosen.

Resources

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bird2 BGP how to announce subnets from the same ASN but from another router

I am trying to learn more about BGP / IPv6, this is my goal: Currently, for testing, I have a VM from a provider that gives me an /44 network This is the current configuration on that VM: router id ; define OWNASN = 1234; protocol…
nbari
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Minimal BGP confguration fails with Sophos SG230 and Alcatel Omniswitch

I got a really minimal network setup with just three BGP routers each in its separate AS. There are two Alcatel Omniswitch and one Sophos SG230, which is connected to both the Alcatels. As soon as one of the Alcatel announces a directly accessible…
andi-ko
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Reached cloud router limits

I have reached the limit of 5 cloud routers per region, if I edit the quotas I can see only a project limit, is it possible to increase the limit of 5 cloud routers per region? if yes, how? Also I noticed that I can create another cloud router in a…
turbos
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Forwarding packets using multiple servers

I have a IP block from RIR. I'm using two providers for make anycast to "some" IPs. I will call this as A and B. I want forward to other provider when that IP not at that location. I'm using two Ubuntu servers to BGP announce and forwarding packets,…
Hoto Cocoa
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Configuring BGP with local-preference set with FRRouting

I want to configure a multi-homed BGP router with preference for one ISP. My actual setup will only receive the default routes and not the full BGP feed from the upstream ISPs. But in this test setup I have a network setup as following and my aim is…
Saumya Kanta Swain
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Attempting to use Ubuntu 18.04 IP forwarding, but it will not forwarding packets received over GRE tunnel

I have two servers, server A and server B. Traffic for a certain subnet, 192.168.1.0/24, comes in through server A. Server A has a GRE tunnel setup with server B, and routes all traffic received for 192.168.1.0/24 over the GRE tunnel to server…
Michale Anthony
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Is it possible to filter directly connected networks redistribute with BGP based on a peer basis?

Assume a simplified case in which router R1 is connected to two BGP peers: one eBGP peer and one iBGP peer. Is there a possibility to advertise directly connected routes only to one of them automatically i.e. whenever a new directly connected…
daniel_p
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Route-Distinguisher (RD) to import and export the prefixes?

Why can't we use Route Distinguisher(RD) as a tag to import and export the prefixes/routes. It is also a unique value per customer, why use the second parameter?
Not-a-Coder
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How to announce IP address in BGP on Cisco router?

I have a BGP router which announces my networks, but I need announce its IP address in BGP. How I can do that?
Puckel
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Routing to a simulated network running inside an AWS Instance

So, we're running a simulated network on a server in AWS and i'm trying to figure our how to enable routing to that simulated network both from inside AWS and from our remote offices. Our VPC CIDR is 10.10.0.0/18 The Simulated network is…
MCC
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How to connect to a BGP network?

A service provider we're working with delivers us data via two(for resiliency) 1Gbps cross connects. He's located in a datacenter nearby the datacenter where our server is located. We don't have a switch, nor do we have a router, just one single…
TheJeed
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How to create a group of servers listening on the same IP-address, allowing failover/takeover?

I'd like to deploy a web application in a robust manner. The application itself is written using Elixir, which runs on top of Erlang/OTP, meaning that the application can be deployed on different nodes which can internally manage failover/takeover…
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