Linux

65665 readers

124 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.
No misinformation
No NSFW content
No hate speech, bigotry, etc

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 7 years ago

MODERATORS

nooter692@lemmy.ml

AgreeableLandscape@lemmy.ml

MarcellusDrum@lemmy.ml

cypherpunks@lemmy.ml

cyclohexane@lemmy.ml

d3Xt3r@lemmy.nz

Can a server's eth & wifi share the same IP address? (lemmy.world)

submitted 4 days ago by ReluctantMuskrat@lemmy.world to c/linux@lemmy.ml

28 comments fedilink hide all child comments

I'm running Linux Mint on a home server that happens to run pihole. Since it's both a dhcp and dns server for my network, it has a static ip address. It has an ethernet connection as well as wifi and it's always been my understanding that you can't have two network interfaces sharing the same IP address, so I've been looking into ways to have one network adapter enabled and the other disabled and then if the network connection of the active device is lost, the other re-enables with the same IP address and disables the other device. This mostly work.

However while debugging one bit of software that seems to have a problem with me disabling my wifi adapter, I inadvertently enabled both the eth and wifi connections while each have the same, manually assigned ip address and everything so far just seems to work. I didn't think this was possible and I'm wondering, should I expect problems? I can connect to the machine remotely fine, pihole and dvr services installed on the box work. Is there any reason to believe this won't work?

you are viewing a single comment's thread
view the rest of the comments

[–] LordCrom@lemmy.world 1 points 1 day ago (1 children)

Best thing to do here is buy a Network interface card with 2 ports that support a floating IP address for HA. each interface can plug into a separate lan switch for HA.

Last time I did this, broadcomm was a good choice.

I would not run any core services on WiFi only.

How many users ? How large a network? Could you offload dhcp/DNS to other devices to improve resiliency?

[–] ReluctantMuskrat@lemmy.world 1 points 1 day ago

I definitely don't intend to run anything core over wifi... my home servers all have direct eth connections but also have WiFi hardware that came with them. The WiFi is really just a backup in case the switch they're connected to dies. And since it turns out the eth and WiFi devices can share the same ip, having a resilient backup was easier than I expected.

In terms of size, the networks has about 70 devices and I've got 2 pi hole servers running dhcp & dns services, including unbound, all with ups' and a generator backup so it's about as resilient as I can make it.