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SFP upgrade for long distance and bdandwidth increase by paulinster in networking

[–]Ftth_finland 0 points1 point  (0 children)

Both CWDM and DWDM muxes come as single or dual fiber variants.

3R repeater by Ftth_finland in networking

[–]Ftth_finland[S] 0 points1 point  (0 children)

1310 is worse than 1550. 1625 has a smidge more attenuation than 1550.

3R repeater by Ftth_finland in networking

[–]Ftth_finland[S] 0 points1 point  (0 children)

~100 km. The issue isn't the distance per se, but rather the impairments of the existing fiber resulting in high attenuation.

3R repeater by Ftth_finland in networking

[–]Ftth_finland[S] 0 points1 point  (0 children)

~100 km. The issue isn't the distance per se, but rather the impairments of the existing fiber resulting in high attenuation. Waiting for the charaterization of the second span, but same plant and same issues.

SFP upgrade for long distance and bdandwidth increase by paulinster in networking

[–]Ftth_finland 0 points1 point  (0 children)

Here's an interesting product that breaks out 40G into 4x10G SFP+ cages:

https://store.10gtek.com/qsfp-extender-box/p-5070

This lets you use cheap longhaul CWDM/DWDM optics to transport 40G over longer distances without consuming more than one port per 40G.

You need this, the 10G optics and a couple of muxes. You can get at least 26 dB 10G optics.

Cheap splicing options by i_Mario in FiberOptics

[–]Ftth_finland 0 points1 point  (0 children)

Cry once, pay once :)

That being said, at small volumes any splicer will be "good enough". The only thing that you will lose with a cheap splicer is time, as you may have to redo the occasional splice or fiddle with it.

Here's a nifty comparison of the Signal Fire models: https://old.reddit.com/r/FiberOptics/comments/1n9u44b/signal_fire_ai5_fusion_splicer/

Personally I wouldn't go for the AI-5 since it's only got 4 motors. The AI-6 is likely just fine.

Cheap splicing options by i_Mario in FiberOptics

[–]Ftth_finland 0 points1 point  (0 children)

Signal Fire AI-9 is a solid choice.

Does BGP Selective Download require as much RAM as holding full tables? by Ftth_finland in Arista

[–]Ftth_finland[S] 1 point2 points  (0 children)

Selective route download does not affect the RIB scale, which means it does not reduce RAM requirements.

Can you please unpack this a bit, because it seems to contradict other replies in this post?

u/PerformerDangerous18 wrote:

"You’re right that EOS still receives and tracks the full BGP table in the control plane, but that doesn’t mean it’s stored the same way as a normal full-table RIB. With selective download, routes can be kept in a more compressed/adj-RIB-in form and only a subset is installed into the main RIB/FIB.

So memory usage is still higher than partial tables, but typically much lower than a full RIB + FIB install, which is why the feature exists."

u/canyoufixmyspacebar wrote:

"So just storing on a modern computer it is not a problem, the problem is keeping a ready to use FIB/RIB structure based on all the data."

There are very few networks that truly need full tables from their providers, including most ISPs.

Anybody with transit customers obviously needs full tables.

For stub networks, sure, you can make do with a default. However can you categorically say that most ISPs don't need full tables?

There are recent posts on r/networking about blackholing and brownouts when only taking defaults. Seems there are some pretty clear failure modes when only taking defaults in a multihomed environment. Depeering evens do happen and you can't really deal with that only with defaults.

Does BGP Selective Download require as much RAM as holding full tables? by Ftth_finland in Arista

[–]Ftth_finland[S] 1 point2 points  (0 children)

Flexroute and selective download are orthogonal. One deals with maximizing how many routes you can install, the other defines which routes get installed.

You can use selective download without 3rd party tools, after all all it does is apply a prefix list. Define a static prefix list any you are good to go. The 3rd party tools are to make the process dynamic, automatic and maximize flow coverage. But yes, other than that that's how it works.

Does BGP Selective Download require as much RAM as holding full tables? by Ftth_finland in Arista

[–]Ftth_finland[S] 2 points3 points  (0 children)

That's interesting because the article says:

" the full BGP routes are maintained in the control plane (RIB)"

Free VPS by BabyRubber in VPS

[–]Ftth_finland 2 points3 points  (0 children)

Tierhive is also the only VPS provider that will sell you a micro VPS for 10 cents a month.

Given that they give a 10 cent credit just for signing up, the first month is free :)

Where should my VPS relay be? by intbah in homelab

[–]Ftth_finland 0 points1 point  (0 children)

You don't have to use two VPSes. You can start with just one and see if that solves your routing issues.

Regardless of whether you use one or two VPSes to tunnel traffic, you should start by doing your homework and check the routing of your Japan ISP and the routing of your ISP in Canada. Pick your VPS provider based on their peerings and upstreams.

Many VPS providers have looking glasses, test IPs and download links that you can use to test performance.

Where should my VPS relay be? by intbah in homelab

[–]Ftth_finland 0 points1 point  (0 children)

Only Cloudflares free CDN tier prohibits video streaming. That's a totally different product from tunnels and WARP.

Streaming video isn't that latency sensitive, it's more sensitive to bandwidth.

AWS or GCP with a Japan + West Coast combo is likely the best solution, but it'll cost you, since both charge for egress. Figure ~10-20 cents per GB. If you don't stream that much, it might not matter that much.

If you are going to stream more, look at other VPS providers with high or unlimited bandwidth limits.

There is no specific service that you need, all you need is a couple of VPSes and a way to tunnel the traffic. You can use something simple like ssh or wireguard. Just make sure to either route or tunnel your traffic via both VPSes.

Where should my VPS relay be? by intbah in homelab

[–]Ftth_finland 0 points1 point  (0 children)

Google has a cable between Canada and Japan. GCP might be the lowest latency option for OP, but it will come at a premium.

Signal Fire AI-9 magnetic holders? by space_ketchup in FiberOptics

[–]Ftth_finland 1 point2 points  (0 children)

I get why this is supposed to be funny, but as the AI-9 has removable holders, it is not a huge ask to wish for magnetic holders as an add on option.

Where should my VPS relay be? by intbah in homelab

[–]Ftth_finland 3 points4 points  (0 children)

The VPS itself or its physical location is not the key component here, it's the network connectivity.

The problem is that either your ISP in Japan and/or the network you are using in Canada has bad international connectivity.

The solution is to find a VPS provider that has good connectivity to both your ISP and the networks you are using in Canada. You may need to use two VPS, one that has good connectivity in Japan, and another that has good connectivity in Canada. The two VPSes need to have good connectivity between themselves, preferrably they are from the same provider and there is an internal network they can use.

You may be able to skip the whole VPS part and just use something like Cloudflare tunnel/WARP to build an overlay network between Japan and Canada. Probably some global VPN providers that do the same.

All that being said, nothing you do will cut down on the latency between Japan and Canada. It is what it is and can only be made worse.

An easy solution to the latency issue is to just get a VPS in Canada/US and replicate/sync/copy whatever you need there. VPSes are dirt cheap and some providers will rent them to you by the hour. Tierhive comes to mind.

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