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Questions tagged [redundancy]

Redundancy is the duplication of critical components or functions of a system with the intention of increasing reliability of the system, usually in the case of a backup or fail-safe.

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Redundant DNS setup

I have a problem with my DNS setup and I really can't understand what's wrong with it. We host our own public DNS servers on 2 different networks (technically, we have 3 DNS servers on 3 different IP ranges but only 2 are in different physical…
Stephane
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HAProxy to the rescue? (multiple machines w. vhosts)

This is more of a 'best practice' or 'input appreciated' question. Currently we manage about 5 webservers (in two DC's) that run Nginx for PHP websites. The plan is to redesign the setup so it is more manageable from an administrative point of…
Matt
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Can I use two different servers for one site? how?

Is it possible to use two servers (or more) for the same site, and with different data? For example server1 has page1.html, and server2 has page2.html and they both can be accessed from www.site.com. Is it possible? How do you think that can be…
stacker
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Using a Dell PowerConnect to set up load balancing/redundancy, 1 switch 2 routres 2 private wan links

We have different locations connected by two different WAN providers. Each site has a dell powerConnect 6224 and two cisco routers with the WAN connections (we don’t have access to router admin). The 6224 connects to each cisco LAN port and to our…
user44661
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How to configure samba+winbind with AD redundancy?

I work for a company that offers a software solution for network management. Part of the solution is proxy authentication. An already legacy option in our software, is to configure a proxy to use NTLM authentication (among other possible…
EdgarLemke
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How to set up Parallel Redundancy Protocol on linux?

I'm trying to setup a PRP connection between to Linux machines (Ubuntu 20-04 LTS) following the doc from TI. The module hsr is present (modprobe hsr works), but when I tried to use iproute2, it seems that it was compiled without support of…
grep
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Finding network topology issues

I am trying to check a network with redundant links for possible issues with switching (STP?) and/or routing. I have a feeling that the issues are intermittent but I'm struggling to find a method how to detect these. What I am trying to do is to…
Tom L.
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Load balance the Load balancer

I am looking to get load balancing for my load balancer. We are looking to create a fully HA network. All of our servers are redundant, the databases are redundant, but above them is a single server running nginx as a reverse proxy to distribute…
bulgarian-beast
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Simple redundant "clone" of a linux server?

My current setup involves a small Linux server that runs a few services (LoRaWAN server, some visualization dashboards, and VPN allowing external access to devices on that network). I want to make it more robust so there is no (or little) downtime…
Gloomy
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EIGRP for Failover

Preface: Reading through O'Reilly's Network Warrior in the chapter "Ethernet Resiliency he describes the following Scenario (Trying to keep this in the limits of fair use): alt text http://www.kbrandt.com/files/HSRP_Limitation.png "Assume that the…
Kyle Brandt
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Pacemaker/Corosync: how to emergency-shutdown all resources (VMs qemu/kvm)

Good morning everyone - Running a 6 node Pacemaker/Corosync cluster with lots of productive qemu/kvm VMs on it, we were wondering how to best do an "emergency shutdown" of the whole lot, ie. when the UPS signals "AC fail" and "low battery". After…
Christian
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How to set-up a secondary/redundancy LTE internet connection?

We're a small-medium office in Vancouver Canada, and we're looking to set-up a secondary/redundancy LTE internet connection. We're looking at purchasing the Unifi Dream Machine Pro to solve this issue, however, I read in the catalog that the LTE…
Vivin Oommen
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Mirror Linux Systems Running Game Servers And Payment Managing servers

I am building a sort of professional hosting service and want to be able to just switch machines if something goes down on one I use AMP which is a web server along with a game hosting server platform as well as whmcs which is kind of a payment…
Jack Schumacher
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Server Redundancy

I have web hosts at 3 different locations. I want to create a fail-safe for the websites, so if one host is down, the web sites are still available.
Jean
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stp - avoid links with packet loss

We have a set of devices connected in a ring, that are using stp (using https://github.com/mstpd/mstpd at the moment) to avoid issues with the loop. What we have seen, is that while stp can adapt the network when a link is fully broken, it ignores a…
eglasius
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