
LLDP on OpenWrt
Install and configure LLDP on OpenWrt Linux
Install and configure LLDP on OpenWrt Linux
A few months ago, I started monitoring my network with Smokeping, more about it later.
I’d also never bothered to check the speed of powerline ethernet. It “feels faster” than WiFi, so I was happy.
When I did my last Velop upgrade to OpenWrt, I did the physical manipulation at my home office desk using the powerline ethernet for various phases of the install.
I have an old web page here on my personal web site. It’s actually my single most popular page.
I write specifically about my scripting FTP file transfers web page. Go take a look, then come back for some navel gazing about it!
I noticed that my DNS aggregator, DNSMasq, was periodically getting bursts of queries about “www.belkin.com” and “heartbeat.belkin.com”.
When I last had problems with PPP, I noticed that some non-routeable IP addresses ended up getting sent out for DNS reverse lookup.
This is different than routing packets with those same (nominally) non-routeable addresses out into The Internet.
We use incredibly weak language around smartphones and point-n-click computer interfaces. It’s embarrassing.
There’s a system admin saying: It’s always DNS
But weird problems aren’t always DNS problems. Better than 50% of the time, they’re cabling problems.
I had to get my production server to clamp MSS (size of TCP data “segment” in bytes) to path MTU.
I run pacman -Syu
about once a week on my Arch Linux
machines, to stay up-to-date,
avoid security problems and generally stay at the bleeding edge
of software revisions.
Today, I ran pacman -Syu
on my Dell R530 server
and it updated the PPP package.
Trouble ensued.