Thread | Brutkey

@steve@mastodon.nexusuk.org

@Dragon@toast.dragon2611.net @revk@toot.me.uk @neil@mastodon.neilzone.co.uk non-IT member of staff at a customer thought that an ethernet cable looked untidy and plugged the loose end into a spare ethernet socket.

Layer 2 loop ensues, brings down the whole network (yes, they should've had STP turned on, but it seems they didn't).

The offending member of staff apparently looked quite sheepish when the tech finally tracked the loop down to the room they were still in :)

RevK :verified_r:
@revk@toot.me.uk

@steve@mastodon.nexusuk.org @Dragon@toast.dragon2611.net @neil@mastodon.neilzone.co.uk LOL...

My son did that at the office, and went to lunch.

Also we had a gigabit link from office to datacentre at ethernet level, it was all gigabit at the time.

Shall we say, err, "fun".

Yeh...

Steve Hill 🏴󠁧󠁢󠁷󠁬󠁳󠁿

🇪🇺

@steve@mastodon.nexusuk.org

@revk@toot.me.uk @Dragon@toast.dragon2611.net @neil@mastodon.neilzone.co.uk Back when I was at university, I fired up dhcpd on the computer society's firewall to serve their internal network and then went to my morning lectures. Turns out the dhcpd man page was a bit wrong and when I configured it to not hand out leases on the external NIC, it sent refusals instead. Turns out it sent refusals faster than the uni's real DHCP server could respond and took out the entire uni network. Back in those days it was a more-or-less flat /16 across the site.

Gary :party_porg:
@WiteWulf@cyberplace.social

@steve@mastodon.nexusuk.org @revk@toot.me.uk @Dragon@toast.dragon2611.net @neil@mastodon.neilzone.co.uk oh, are we doing DHCP/university network war stories? 😀

So, back before wifi was a thing, we'd have a few thousand freshers turn up each year with PCs with no NIC in them, wanting to connect to them to the halls of residence network.

The local bricks and mortar computer shop would happily sell them cheap chinese NE2000 clones. Except this one year they'd got really cheap ones, that all had the same MAC address 😳😂