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Questions tagged [anycast]

51 questions
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Transparent geographical DR website failover

We've already got webservers that are loadbalanced. And even though outages shouldn't happen, they do, for a variety of reasons. (central switch failure, misconfigured ISP routers, backbone failures, DOS attack on shared infrastructure) I want to…
Eric Falsken
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Is it possible to determine how may servers is connected to an anycast address?

It's possible to set up several servers with the same IP-address, on the internet, using anycast address. Using routing protocols , the server geographical closest to you responds to queries. I simply wonder if it is possible to determine how many…
LopLop
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Route outgoing packets from VM to GRE tunnel from which income packets came from? (TCP flows)

We have a network infrastructure with Anycast IPs on edge servers in multiple countries, those servers encapsulate traffic in GRE tunnels to endpoint nodes with virtual machines Currently we route all TX to default route with one of our EDGEs, but…
Oleg Pawson
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How does hybrid unicast/anycast work for global load balancing?

In the Dropbox Edge network write up, the author mentions that they have taken a hybrid approach by announcing both unicast and anycast ip of PoP. One can enable this hybrid GSLB by announcing both PoP’s unicast subnet (e.g. /24) and one of its…
bornfree
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How do you port forward with Anycast?

I try to Forward a Port from an Anycast IP (111.111.111.111), which has multiple POP's and the Port should be then forwarded to a single Unicast IP (10.0.0.1). All of them are reachable over a VPN, for forwarding the traffic. There is a service…
Ne00n
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Is IP Anycast helpful for fast loading website?

I'm not sure but before I purchase http://dnsmadeeasy.com IP anyast service I really need to know What is IP Anycast actually and how does this work? Can anyone explain in simple sense?
Brittney Bauer
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With anycast DNS, is it the IP or the FQDN that is doing it?

i am somewhat new to anycast and i want to know if it works on the IP or the FQDN. The reason i ask is, i have a anycastDNS account with a provider. And i would like to use my own domain name to make it whitelabel. So i could use a CNAME record to…
PixelPaul
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Is it possible to have 1 IP Address for a cluster of recursive DNS Servers?

Is it possible to have 1 or two static IP Address for a cluster of recursive (but not open relay) DNS Bind Servers that are being hosted on different cloud vpn providers? We want to have two DNS servers behind 1 ip address (one at Rackspace, one at…
Kladskull
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Geographical proximity based IP translation

I'm currently using Amazon's EC2 for my socket application to which mobile devices connect via an application I've written (it uses the server's IP address to connect). I'm looking for a Load Balancing service, that will translate an IP address to a…
Daniel
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Will anycast helps me in my case and how to implement it?

I have several servers with different IPs, deployed in different datacenters (mostly geographically close to our users). Let's imagine that this is simple web servers. What I'd like to have is a single IP address for server so all users simple use…
Alexander
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How to geolocate a server using an anycast ip?

Usually an anycast ip can be located say in the US, but the server itself thats sending the request is located in Europe. I'm wondering if there's anyway of finding out where the server is located.
Incognito
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Scanning or identifying anycast IPs

I'm trying to find a way of "identifying" anycast IPs. This turns out to be rather tricky, as it's (usually) dependant on BGP routes directing you to the nearest available host. What are common techniques of identifying if a certain IP address is a…
Mojah
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Is this anycast behaviour correct?

When connecting to an service provided using anycast, I am experiencing different behaviour depending on whether the request is made using TCP or UDP. With TCP, the request is made to address A, and the subsequent response also comes from A. With…
etheros
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Listening on all interfaces, multiple servers

I have a server listening on all interfaces for a port (using go net.Listen("tcp", ":{port}")). I also have backup server with the same code, to start if first server fails. Both machines using the same router which has an external IP address.…
Lovish Puri
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Will anycast failover to the next server if it encounters a 404 from an nginx server?

I know that anycast will failover for layer 3 issues but will anycast failover if a file is not present? I.E. like a 404? It seems like it won't, like as long as nginx returns something anycast will consider that server healthy.
user970705
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