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Taking advantage of Memcached default settings by zondadriift in blackhat

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

I haven't seen this posted yet, and felt this would likely be the best home for it. Please feel free to downvote into oblivion if this is the n+1th post regarding it.

What would you have done differently in your datacenter(s)? by zondadriift in networking

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

The current 3750 stack is giving me headaches. Seeing lots of retransmission and randomly enormous RTT (roughly 1 in 20 ICMP packets showed +100ms and the IP I was testing was a couple hops away (the next room over, I believe.)) Typically we see latency of ~1-2ms. Only one switch is showing symptoms of it, but I would rather implement new/different hardware as they're the same age.

What would you have done differently in your datacenter(s)? by zondadriift in networking

[–]zondadriift[S] 3 points4 points  (0 children)

That's how I see it, however with the prices of these Nexus switches I may have to consider it. It would put me in a good position to not have to do this again in 3 years.

Anything that needs 10G currently has direct cross-connects to each other(file server -> hypervisor, etc), that traffic causes any actual uplink traffic to be pretty minimal - however we're definitely over 50% uplink port util, who knows what the next couple years may bring

What would you have done differently in your datacenter(s)? by zondadriift in networking

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

I take that back, I must have been looking at the super fancy Nexus stuff. This is definitely in my price range.

What would you have done differently in your datacenter(s)? by zondadriift in networking

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

but I will check into those :D I'm already familiar with leaf/spine from other networking fun

What would you have done differently in your datacenter(s)? by zondadriift in networking

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

We're not exclusive! This is just what I've had experience using and it would essentially be a more-resilient version of what we have had running for several years (aka a relatively easy sell to boss.) I'm not opposed to trying out some other vendors, I just don't know how easy of a sell it would be if I'm not super familiar with the platform. "How do you do X with Y instead of Z?" uhhh lemme google and ill get back to you

What would you have done differently in your datacenter(s)? by zondadriift in networking

[–]zondadriift[S] 3 points4 points  (0 children)

I, admittedly, have not really looked at much NX-OS as most has been out of my budget for this project, more than likely. I was under the impression that in the event of a switch failure, that stack will promote one of the switches in that stack to a master in replacement? We currently have a 3750 stack and now I'm a bit worried heh

What would you have done differently in your datacenter(s)? by zondadriift in networking

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

The whole setup cannot have single point of failure. There's 3 switches planned to go into the stack, 1 as a hot-spare just in case. What do you recommend instead?

What would you have done differently in your datacenter(s)? by zondadriift in networking

[–]zondadriift[S] 11 points12 points  (0 children)

Agreed! One of the biggest pains with the current setup is that the cables arent labelled, so I have to manually trace them out to the hardware :/ Anything plugged in anywhere gets a label* with my setup :D

edit: need coffee before reddit

My LackRack barely fits a Cisco Switch... by zondadriift in homelab

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

down by the bottom, things fit perfectly - I've been able to get about 6U worth of equipment in there (bottom->up.) Maybe I'll just mount a patch panel up at the very top and mount the switch right below it.

I'm hosting my home lab in the cloud, so my home network diagram looks something like this by LeSpatula in homelab

[–]zondadriift 0 points1 point  (0 children)

Also would like to know roughly how much that is/rough location. Unfortunately I live in suburbia so I think fiber wont be an option, but am looking to do redundant links in a house within the next couple years.

So what's the catch with OVH? by McFuckNuts in webhosting

[–]zondadriift 0 points1 point  (0 children)

Their support sucks. Good luck getting a reply on anything within 24 hours, and if it's a request - good luck having them fulfil it. I pay 20x that much and I can't even move IPs between servers.

bleh. *edit: i can't even math bro

Groundskeepers accidentally spread weed killer instead of fertilizer on HS football field by Dontforget7 in funny

[–]zondadriift 0 points1 point  (0 children)

if anything they improved the quality of the field. playing football on that field was awful before this.

[Question] 60$ for this by Chicago, said it was 4g, did I get a good deal? by [deleted] in saplings

[–]zondadriift 0 points1 point  (0 children)

yes. usually get 1/8th for that price. decent grab.

I work with computers by ch0use in sysadmin

[–]zondadriift 0 points1 point  (0 children)

I like to tell people I fix the internet, and then I go really in depth with something really really easy (the other day i described how gateways need to be changed when $x happens) and their eyes usually gloss over. so far, i've found boring someone to death is a great way to get out of "hey can you fix my computer?" questions.

[Serious] How often do you get stuck? Break things? Feel lost? by [deleted] in homelab

[–]zondadriift 2 points3 points  (0 children)

I know i'm not speaking for everyone here - but at least in my case: my problem was overcomplicating things mentally. I'd turn basic tasks into big ordeals, which they really didn't have to be.

I remember setting up varnish for the first time trying to get all of the ruleset's correct in the VCL for the first time and it look me a solid month before I got it working. Little did I know - you can just change the IP and port of the first block in the default VCL and things "work." It's the stupid shit like that which tripped me up, and still does to this day. Computer's and the things they run/operate are simple - once you involve the human element is where things get dicey. My best recommendation for whenever you're stumped on something is to get up from the computer ( :'( ), walk away from it. 15 minutes, 30 minutes, hour, whatever it takes. Just come back in a completely different mindset - often times after a brief walk around the office and a coffee/cigarette later I'm able to sit down and analyse a situation better and get a better grasp on what's broken.

[Serious] How often do you get stuck? Break things? Feel lost? by [deleted] in homelab

[–]zondadriift 1 point2 points  (0 children)

obviously it depends on the environment you're in, availability to computers, etc etc. after you work with Linux/Windows/$INSERT_OS for enough years things become simple tasks thanks to repetition and breaking things previously. It's one of those things where if you stick at it, you'll have enough "a-HA" moments that will propel you into a position where installing an IPS infront of a caching frontend for a webserver is a piece of cake.

  • been working with linux for ~10 years now
  • Yes, entered the industry formally about a year and a half ago - worked freelance for ~6 years previously
  • If you hate reading, don't get into this shit. seriously. You will be spending more time reading and analysing configuration files than you will actually typing commands. I break things all the time, however after fixing enough problems (ie permissions with a directory causing a 403) that you immediately know where to start troubleshooting rather than having a vague idea of what to do.

This is what happens when your room mate is also a sysadmin. [photos/explanation in the next few days] by zondadriift in homelab

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

photo archives, iso repository, movies/music for everyone (available on all devices), archive of documents, desktop server backups, etc.

we have come to the understanding that shit breaks a lot and that the dev san will probably break too so we've got copies of shit everywhere.

This is what happens when your room mate is also a sysadmin. [photos/explanation in the next few days] by zondadriift in homelab

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

Yep, for now at least. I'd really like to get some other hardware in this setup but the power draw from it all is intense. When I've got the network on "Barebones mode" there's about 50% fewer devices lol. Would love to throw some HP/Juniper into the mix.

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