The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Ethernet’ Category

Link archive: ASUS MN78 PRO URLs

Posted by jpluimers on 2019/02/08

Since my brother has this motherboard: M4N78 PRO GREEN.

It does WOL, but doesn’t always wake up when powered down.

–jeroen

ASUS Serial 93M0AI195747; Part 90-MIB7C0-G0EAY00Z; M4N78 PRO GREEN; UPC 61083916977; EAN 4719543169773

Posted in Ethernet, Hardware, Mainboards, Network-and-equipment, Power User, Wake-on-LAN (WoL) | Leave a Comment »

Raspberry Pi cannot be woken up by WOL, but it can send, and there is Whack-on-LAN

Posted by jpluimers on 2019/01/17

Cool stuff if you want to make your own WOL devices out of spare parts.

From old to new:

They can be woken up by anything sending magic WOL packets, including Raspberry Pi (which cannot be woken up by them, though you could use a Whack-on-LAN for that).

Basically the Raspberry Pi cannot be woken up with WOL because of a few reasons:

  1. The ethernet chip is connected over USB so it cannot pass the WOL result further on.
  2. If it could, there still is no BIOS to process the WOL result.
  3. When it is halted but has power, the CPU isn’t active. The GPU is, but cannot process the WOL.

It can be a WOL server though: [WayBackRaspberry Pi As Wake on LAN Server: 5 Steps (with Pictures)

–jeroen

Posted in Development, Ethernet, Hardware Development, Network-and-equipment, Power User, Raspberry Pi, Wake-on-LAN (WoL) | Leave a Comment »

Strange MAC addresses starting FA:8F:CA without OUI in your network? They are Locally Administered Addresses and likely from Google.

Posted by jpluimers on 2019/01/07

A while ago, I write about Locally Administered Addresses: a few series of MAC addresses you can use on your local network: MAC address ranges safe for testing purposes (Locally Administered Address).

A while ago, I found ones in my network and ones in my WiFi SSID survey starting with FA:8F:CA. They did not show up in the Wireshark · OUI Lookup Tool nor their manufacturer database.

But with bit 7 turned off they start with F8:8F:CA which does show up as “F8:8F:CA Google, Inc.”

They appear to be Google devices, in my case Google ChromeCast ones, though they can also be Google Home ones.

Google does “magic” with networks, just look at a few of the links here:

–jeroen

Posted in Ethernet, Google, Internet, Network-and-equipment, Power User, Ubiquiti, WiFi | Leave a Comment »

Going to test some USB 3 gigabit ethernet adapters based on Realtek RTL8153 and Asix AX88179 chips

Posted by jpluimers on 2018/07/27

Later on, I might add a USB31000S in the mix, but I will do some initial testing with USB 3 gigabit ethernet adapters based on Realtek RTL8153 and Asix AX88179 chips.

Things I will focus on with my Retina MacBook Pro 2015 model are:

  • CPU usage
  • Throughput
  • Duration between reconnect on USB after suspend, and renewing the DHCP lease
  • Promiscuous mode capabilities

Some links for my references:

A first impression from the above links is that for Realtek chipset based devices, drivers are more readily included in operating systems, and these chipsets are better at VLAN handling.

–jeroen

Posted in Ethernet, LifeHacker, Network-and-equipment, Power User, USB, USB, USB-C | Leave a Comment »

MAC address ranges safe for testing purposes (Locally Administered Address)

Posted by jpluimers on 2017/10/25

Similar to IP ranges for private networks that are safe for testing

  • 10.0.0.0/8 (255.0.0.0)
  • 172.16.0.0/12 (255.240.0.0)
  • 192.168.0.0/16 (255.255.0.0)
  • fd00::/8

there are also locally administered MAC address ranges safe for testing

  • x2:xx:xx:xx:xx:xx
  • x6:xx:xx:xx:xx:xx
  • xA:xx:xx:xx:xx:xx
  • xE:xx:xx:xx:xx:xx

Thanks to [WayBack] Sam and [WayBackPeter for answering.

–jeroen

References:

Posted in Ethernet, Internet, Network-and-equipment, Power User | Leave a Comment »

T568A and T568B termination – TIA/EIA-568 – Wikipedia

Posted by jpluimers on 2017/08/04

Edit 20260424: Cisco images via Wayback Machine as some of the links had died. Added some extra notes.

Note to self: looking at the various patch cables, it looks like most manufacturers prefer T568B over T568A. Not sure why. I adopted T568B to avoid any confusion.

As I always forget the images on FTP/STP/UTP wiring in both connectors and outlets and forget which standard is T568A and T568B: T568A and T568B termination – TIA/EIA-568 – Wikipedia:

Read the rest of this entry »

Posted in Ethernet, Hardware, Network-and-equipment, Power User | Leave a Comment »

Getting the vendor from an ethernet network MAC address on-line through the Wireshark OUI Lookup Tool.

Posted by jpluimers on 2016/11/18

In networks, often you want to know which manufacturer or vendor is behind a MAC address.

An easy way to look this up on-line is by using the
Wireshark · OUI Lookup Tool which should have had MAC or MAC address in the title.

It uses both the extensive /etc/manuf Wireshark Ethernet vendor codes and well-known MAC address prefixes (which is a long text file generated from several sources). Some of the prefixes are just the 24-bit (6-hex digit) OUIs, but others are much more fine grained.

What’s really cool is that the tool accepts a very lenient formatting of inputs: full, partial, various hex separators (including none), case insensitive, and vendor names/abbreviations. So entries like these magically work.

0000.0c
08:00:20
01-00-0C-CC-CC-CC
missouri

–jeroen

Posted in Ethernet, Network-and-equipment, Power User | Leave a Comment »

MikroTik CRS226-24G-2S+RM Review – A super switch

Posted by jpluimers on 2016/04/18

Interesting device: Our review of the MikroTik CRS226-24G-2S+RM a 1U rackmount 24 port gigabit switch with dual 10 gigabit Ethernet SFP+ ports and a slick management interface.

Source: MikroTik CRS226-24G-2S+RM Review – A super switch

It’s fanless, support SFP+ and many people seem to like it.

Pictures are at Just got my CRS226-24G-2s+RM! – MikroTik RouterOS.

There is also a desktop version of it called CRS226-24G-2S+IM.

–jeroen

Future reading:

Posted in Ethernet, Network-and-equipment, Power User | Leave a Comment »

Mac/PC: sending Wake-on-LAN (WOL) packets

Posted by jpluimers on 2014/07/25

I’ve succesfully woken up these machines:

  • HP XW6600 running ESXi 5.1
  • ThinkPad W701U running Windows 7

I still need to try to wake up a Mac Mini Server running OS X 10.6 (Snow Leopard).

MacBook Air on 10.7 (Lion) and Retina on 10.8 (Mountain Lion) won’t work as they are WiFi only, and WOL does not work over WiFi.

On 10.7 and up it might not work on a Mac Mini Server either, as Apple Introduced Dark Wake.

I used these tools to send WOL packets: Read the rest of this entry »

Posted in *nix, Apple, ESXi5.1, Ethernet, Hardware, HP XW6600, Linux, Mac OS X / OS X / MacOS, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Network-and-equipment, openSuSE, OS X 10.8 Mountain Lion, Power User, SuSE Linux, Virtualization, VMware, VMware ESXi, Wake-on-LAN (WoL), Windows, Windows 7 | Leave a Comment »

Some Mikrotik and RouterOS Links to get it running on ESXi for experimental purposes.

Posted by jpluimers on 2014/03/27

RouterOS runs on many kinds of hardware. Of course on the MikroTik hardware itself (which always comes with a license), but also on x86 hardware, even virtualized systems.

In that respect, it looks a bit like pfSense, or Endian, but on steroids and closed source.

Here are some links focused on MikroTik  on ESXi (which is great for experimental purposes):

WOL (Wake ON LAN)

–jeroen

via: Routers.

Posted in ESXi4, ESXi5, ESXi5.1, ESXi5.5, Ethernet, Internet, Network-and-equipment, Power User, routers, Virtualization, VMware, VMware ESXi, Wake-on-LAN (WoL) | Tagged: , | Leave a Comment »