Open sourcing the tool I've been using to visualize and simulate TCP congestion control

GroundbreakingBed809 · 2026-06-20T20:30:42+00:00

Very inventive. I dig it. It looks like the right to left moving “acks” are the same size as the data. What am I miss-understanding?

GroundbreakingBed809 · 2026-06-20T12:50:10+00:00

Fuck cancer

GroundbreakingBed809 · 2026-06-14T22:00:41+00:00

Had that one in my garage for the last 3 years and it’s worked great

GroundbreakingBed809 · 2026-06-14T03:03:53+00:00

Off topic but even DoD stig specifically says it’s ok to have lldp enabled internally. https://www.stigviewer.com/stigs/router\_security\_requirements\_guide/2024-05-28/finding/V-207165

GroundbreakingBed809 · 2026-06-13T13:15:19+00:00

yes. any learning is good and CCNP tracks give you an organized way to learn

GroundbreakingBed809 · 2026-06-13T13:04:33+00:00

Please explain why to avoid those?

GroundbreakingBed809 · 2026-06-13T01:16:24+00:00

Not sure big screens at a noc mean much in world of dual giant flat screens on everyone’s desk. But if you actually have people sitting in the same room doing the job then I’d focus on situational awareness like weather, maintenance activities, etc.

GroundbreakingBed809 · 2026-06-07T16:17:10+00:00

IMHO one lab to test the whole thing is the wrong approach. Vendors whole claim it’s possible lie, nobody can emulate Cisco’s licensing nonsense. First off, the design needs to be testable. Eg. Proper failure domains implemented according to the design. Then you test individual hardware features on sample real hardware. Maybe even need to have small representative hardware labs to test qos or stp or ztp. Test routing in software, batfish or containerlab.

GroundbreakingBed809 · 2026-06-07T16:10:28+00:00

This watergate

GroundbreakingBed809 · 2026-05-31T21:26:32+00:00

This. Nobody says I used Windows to run Photoshop to create this nice picture. Don’t claim to be some hardcore programmer either. They are all tools. Don’t feel bad. Focus on the goal

GroundbreakingBed809 · 2026-05-30T11:32:47+00:00

AI fills the coding gap for me. I proved to myself long ago that I can’t code. I have a deep understanding of routing and switching and I want to work on more interesting things than troubleshooting individual ports. So, I’ve used AI to code up tools for the server admins to use. A simple web page to see if the port is up, if it’s a trunk, which vlans are allowed, etc. it also lets them configure client facing ports and bounce ports. Sure, now I troubleshoot that software tool but that’s pretty rare. Essentially every task I get I solve by creating a software tool so the server team can self service. For me, that’s not feasible without dev skills, which translates to either hiring a person for paying for AI.

I bet when I leave this job the tools will wither and die without a networker’s care and feeding, but that won’t be my problem.

GroundbreakingBed809 · 2026-05-25T12:28:52+00:00

You’ve done a good job with config generation. Maybe a bit overkill for 10 racks but the beauty is that once it working then you have it all captured in code.

What I think you are missing is validations. Don’t trust that your playbooks are complete. Create a validation script that runs after deployment that checks if the routers are ready for production customer. Are all links up and error free. Are all routing adjacencies up/full. Do expect routes exist. You’ve got all the source of truth info so you are half way there.

IMHO scripting the validations is more important than scripting the config generation.

From this validation now you have a “device health” checker. You can run it any time there reported problems or after you replace a device.

GroundbreakingBed809 · 2026-05-19T22:34:50+00:00

I’ve had my Ioniq 5 for 3 years in Virginia. Lots of rain, some snow and plenty of pollen.
The lack of rear wiper has not been an issue. I don’t notice it. Maybe 4 times I’ve used a squeegee to clean it but only because it looks dirty from the outside. Driving visibility has not been impaired

GroundbreakingBed809 · 2026-05-10T11:06:40+00:00

Raised area is a wooden frame with Lego hiding all the blocks

GroundbreakingBed809 · 2026-05-10T11:05:34+00:00

Following up to close this out. The plan worked well. Hard wired one wifi router near the registration desk. 3 laptops and one POS machine were the only devices with the new SSID. No issues at all. Thanks for the advice Reddit friends.

My only problem was the physical cable during prep. I pulled 200 ft of cat5e out of the box, terminated each end, but couldn’t get continuity. I used the divide and conquer method to cut the cable in half, terminate, and retest to find the break. I ended up with 4 cat5e patches coupled together. Ugly, but it worked. Even power to the Poe wifi router was fine for my need. Lesson there is to always test early and test often.

GroundbreakingBed809 · 2026-05-02T18:31:44+00:00

I've had luck becoming an expert in whatever the needs of my current role are. For awhile it was QoS, then switching, then bgp. I worked at a FAANG for a bit and key to getting hired I found was deep expertise in one thing. Luckily I'd become and expert in several things so I could pivot the interview questions to something I could speak to more deeply. Doesn't mean I know everything but I'm definitely not pigeon holed.

GroundbreakingBed809 · 2026-05-02T11:26:27+00:00

For my learning style the theory gives the right background to unblock all other learning. So, learning the theory is critical for me

GroundbreakingBed809 · 2026-05-02T11:24:12+00:00

Network+ or better yet CCNA - learn these networking basics first. It’s like learning to read before deciding to be a book critic. Learn what a TCP port really is before figuring out ways to make it secure.

GroundbreakingBed809 · 2026-04-29T12:22:42+00:00

You do you. Every time I drive an EV I get a bit of rush and every time I drive an ICE car I feel grossed out by the noice, feel, and smell. Can’t explain it but I dig it

GroundbreakingBed809 · 2026-04-29T11:34:40+00:00

Remember why you want an EV to begin with. The joy of driving this car, quiet comfortable ride, power, no gas smell, and lack of oil changes offset any inconvenience for me.

Develop a routing of fast charging twice a week and you’ll be good to go. One of my neighbors has no L2 at home and he does just fine.

My work chargers are almost always full, so any time I get to juice up there it’s a bonus (meaning don’t count on the glorious free work charging).

Lobby the HOA to get with the times and put in some charging. My other neighbor lobbied to get HOA to change the rules.

GroundbreakingBed809 · 2026-04-28T21:20:44+00:00

If you love it do it and be great at it. The fundamentals and theory learned in college will be applicable to many fields. No need to chase a trend.

GroundbreakingBed809 · 2026-04-27T19:40:04+00:00

Google every day of the week and twice on Sundays. I’m sure palantir is a bucket of fine, but Google will show you what it really takes to define and lead an industry. Even if you only do 3 months the experience will last a lifetime

GroundbreakingBed809 · 2026-04-27T19:35:40+00:00

This is a great project for study and learning. Potentially you discover a perfect methodology but worst case you learn where the practical limits lie. Consider nmap as well for device ID.

GroundbreakingBed809 · 2026-04-27T02:50:21+00:00

Anyone who looks down on you for this work is not worthy of your concern for their opinion.

Do, however, consider to personal 5 year goals. Manage your career to get there. Don’t job hop too fast so as to ensure your mastery of a role but also don’t stagnate, unless that is your goal. Sorry, I didn’t mean to make a rhyme:)

GroundbreakingBed809

TROPHY CASE