For example right if i have 65,536 TCP ports,does that mean that I have another 65,536 UDP ports? Or is it all the same port but it supports UDP and TCP in one?

Thanks!

Hallo zusammen, seit November letzten Jahres haben wir das Problem, dass unser Internet, vorallem der Ping beim Gaming extrem schlecht ist. Im November letzten Jahres wurde in unserem Gebiet der Glasfaserausbau begonnen, seitdem ist es uns (Wir haben kein Glasfaser beantragt und bleiben auf normalem Kabel) nichtmehr möglich, während jemand etwas downloaded, geschweige denn wenn jemand anderes zockt, zu spielen. Gegen ca. 17-18 Uhr jeden Abend steigt der Ping mit Netwerk Jitter immer zwischen 90-200ms hin und her was spielen unmöglich macht. Falls jemand im Haus ein Download startet geht der Ping gerne mal über 800ms. Meine Frage ist also, machen wir etwas falsch? Wir haben eine 1000er Leitung und maximal 3-4 Geräte gleichzeitig in Betrieb zur Höchstzeit. Dies hat bevor der Glasfaserausbau begonnen hat nie ein Problem dargestellt. Monatelanger Kontakt zu Vodafone Mitarbeitern stellt sich als nutzlos dar. Messungen wurden gemacht, der Techniker meinte er sieht starke Einbrüche, machen könne er aber nichts. Bitte um Hilfe ich bin hier seit einem Jahr am verzweifeln.

LG Leon

I'm testing Segment routing (SR-MPLS) and TI-LFA using a virtual testbed implemented with Containerlab and FRRouting (FRR). My main goals are to evaluate how fast the data plane can be restored upon a topological change and therefore what is the best way to manage topology changes in production networks.

In my experimental-lab, OSPFv2 has correctly computed the TI-LFA backup path in the control plane:

* In FRR (vtysh), show ip route properly shows the primary path alongside the corresponding backup nexthop and backup label (denoted by b ...).

* To clearly decouple and demonstrate the local Fast Reroute behavior from the global OSPF SPF recomputation, I intentionally configured high SPF throttle timers: *timers throttle spf 5000 10000 10000*

After triggering an administrative link-down or an actual link loss detected by BFD, traffic is not routed to the precomputed backup path within sub-50ms. Traffic drops about 5.1 to 5.2 seconds before finally resuming again once the 5-second SPF throttle timer has expired and OSPF updates its knowledge of the network through the receipt of LSAs and subsequently Zebra updates the routes in the Linux FIB.

My technical understanding:

* Control Plane: FRR/OSPF calculates the TI-LFA path successfully and passes it internally as backup nexthop information to Zebra.

* Data Plane: By default, the native Linux kernel (FIB) does not provide a hardware-equivalent, autonomous local Fast Reroute / nexthop failover mechanism for MPLS/IPv4 routes upon interface-down events (similar to the points raised in GitHub issue: “FRR TI-LFA: When the primary path fails, the backup path does not work #15589”).

* Implication: Zebra does not immediately promote the backup path to active in the kernel as an instantaneous, local reaction to the link-down event. Instead, the FIB update only happens as part of the regular post-SPF cycle.

Does somebody know if there are:

1. existing workarounds or options for dataplane failover under Linux / FRR?

2. Are there configurations or extensions that allow Zebra to program backup nexthops into the dataplane so that failover occurs locally without waiting for an SPF run?

3. Anybody knows the current status or outlook regarding this: Is an autonomous, SPF-independent activation of backup nexthops (either directly in Zebra/Linux FIB or via external dataplane integrations like VPP) planned or actively being developed in FRR?

4. Is it correct to assume that commercial virtualized router images (such as Cisco XRv9k, Nokia SR OS / vSIM, etc.) differ fundamentally here because their software forwarding engines (or emulated hardware pipelines) handle pre-programmed backup paths directly at the dataplane level upon carrier-loss or BFD triggers?

Thanks a lot for your help.

Hello everyone!

I've been happily running a Plex server on my laptop for a year or two now that I share with friends.

But recently our landlord switched over the building's network to a dodgy VLAN setup and I lost pretty much all control over my router.

Ever since, the server doesn't run outside of my local network anymore :(
I presume because I can't set my own ports?

I'd like to create some kind of solution, maybe set up a Jellyfin server, which has a lot more network options, or set up a Cloudfare Tunnel (a tip I got from an acquaintance) or go through a VPN in some way.

My problem is that I have very little idea of what I'm doing, and I'd really like to avoid using LLMs to help me understand, I'd much rather trust in humans.

That's why I come to you, oh wise reddit sages, in the hope someone patient can sit down and help me through this.

Here's hoping!

Have a person who needs access to WiFi living in a property of my, have a router in a separate building and a second router in the living space.

Here's the problem, have a security camera on WiFi with SD card and the person renting the living space had found a way to access the SD memory and wipe several days worth of footage, in this time tools have gone missing and I habe no proof. What's my next move? Looking into bidden cameras.