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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.

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What kind of routes can be propagated to VPC route tables?

in AWS, What kind of routes can be propagated to VPC route tables ? I know: site-to-site VPN routes via Virtual Private Gateway anything else ?
exeral
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NGINX: Map IP to ASN

in Preparation for GDPR I want my NGINX to not log IP's any longer, but log the AS Number. To map the ip to an AS number, I would use the BGP datasets from Ripe, and import them in an MySQL table. But: How do I map the Data inside NGINX? Is the…
margau
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Cisco - BGP Best Path Algorithm - Which criteria

I set up below topology on Cisco IOU environment. R1, R2 and R3 routers are configured with one loopback interface on each, having "1.1.1.1", "2.2.2.2" and "3.3.3.3" addresses respectively. These loopbacks are advertised on OSPF as well as BGP…
Jim Raynor
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bind address of application on multihomed server

I have a multi-homed server running bgp via quagga If I fire up an application on this server that initiates a connection, by default it is going to choose the interface with the lowest metric, ie the address of the neighbour of the bgp router,…
camelccc
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How can one update BGP ASN on an Azure Virtual Network Gateway?

I have an existing Azure Virtual Network Gateway I'm attempting to reconfigure for use for BGP, per https://azure.microsoft.com/en-us/documentation/articles/vpn-gateway-bgp-resource-manager-ps/ . However, I cannot find how to change the default…
cjp
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Benefits of peering with Transit Providers at exchange points

Whilst investigating choices of IXPs and browsing through member lists, I realised that Hurricane Electric publicly peered on AMS-IX and other popular IXs. I also came across their peering policy that says they are open to peering with anyone.…
jduncanator
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Internet Routing with BIRD

I am testing BIRD to put into production to replace several VPN appliances I am using to route to my AWS site. I've never used BIRD before so please forgive ignorance/ If I put a test windows machine behind this routing server I am able to route…
bakesale
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How can I multipath BGP prefixes of equal AS-path length?

Say I have two routes of 10.0.0.0/8. One has an AS-path of 100 200 300, the other has 400 500 300. How can I make BGP install both routes into the FIB on a Cisco router?
awkisopen
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How long BGP reconnect happens?

when the bgp peer is down or during initial startup if the bgp speaker is not able to reach the peer, how long will the reconnect tries happen? will the bgp speaker try reconnecting infinitely ?
Hemanth
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Border Gateway Protocol

I'm moving our company out of managed hosting into our own colocation. I have a variety of high quality options for bandwidth and my network consultant suggests we run BGP with multiple providers in an active/active setup. While this sounds great…
Tiffany Walker
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Network outage - Mapping, Checking network, BGP, Traceroute, RIPE

At first, I'm not able to name my question properly, so this will be adjusted I recently experienced an international network gap. Mean when some part of world wide network is unavailable. I'm able to find out using ping,traceroute,nmap tools where…
Marek Sebera
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Peering with an internet exchange

Our organization is planning to peer with the local internet exchange, we are planning to obtain an AS number to allow us to do this. However I was unsure if we also need our own IP address space to get connectivity. Would anyone be able to clarify…
RayQuang
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What routing protocol to use with MPLS?

My MPLS provider is giving us a choice to use static routes or BGP for our new MPLS setup. What are advantages/disadvantages of the 2 choices? What is more commonly used?
Alex
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How to get ip prefixes from children of given as number?

So, for example I have as number as10282 how I can get ip prefixes of children for the given as number? bgp lookup tool Given tool is exactly what I need (with ticked include downstream prefixes), but I need to implement it in my application, how…
shake
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Site of origin with MPLS

I'm learning about MPLS. I have two sites in my scenario using eBGP for PE-CE communication, and both using the same ASN (deliberately as I want to know about SOO) and I cannot advertise a route from one site into the other due to the AS Path…
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