Re: Ethernet port "bounce" command?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, 2021-03-02 at 08:33 +1100, Cameron Simpson wrote:
> Aye. FWIW, in a former life the place I worked at made all our
> crossover cables yellow so that we knew what we were looking at.

I'd always understood that gigabit didn't need crossover cables, though
just read that it's in the spec that gigabit can handle peer to peer
without a crossover cable, devices don't actually have to incorporate
that features into themselves.  Argh!  Back to square one.

Autocrossover was possible on 10/100 megabit ethernet devices, too, but
much more rarely implemented.

The old 10/100 ethernet crossover cable just crosses over two pairs in
the cable, and ignores the other two pairs (completely ignores them,
they're generally not used at all, and not crossed over).  Cheap
ethernet cables bundled with some routers didn't even wire up the spare
4 pins.

Gigabit ethernet cable crosses over all four pairs.

So, label your cables (half-crossed, fully-crossed, 2-pairs crossed, 4-
pairs crossed, whatever label makes the most sense to you).

Quite a few of us only connect computers together through switches or
routers, so don't use crossover cables.  But some of us also have
connect a switch to a switch, when doing inter-room networking.  I
wonder how many routers or switches stuff-up auto crossover?
 
-- 
 
uname -rsvp
Linux 3.10.0-1160.15.2.el7.x86_64 #1 SMP Wed Feb 3 15:06:38 UTC 2021 x86_64
 
Boilerplate:  All unexpected mail to my mailbox is automatically deleted.
I will only get to see the messages that are posted to the mailing list.
 
_______________________________________________
users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx
Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx
Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure



[Index of Archives]     [Older Fedora Users]     [Fedora Announce]     [Fedora Package Announce]     [EPEL Announce]     [EPEL Devel]     [Fedora Magazine]     [Fedora Summer Coding]     [Fedora Laptop]     [Fedora Cloud]     [Fedora Advisory Board]     [Fedora Education]     [Fedora Security]     [Fedora Scitech]     [Fedora Robotics]     [Fedora Infrastructure]     [Fedora Websites]     [Anaconda Devel]     [Fedora Devel Java]     [Fedora Desktop]     [Fedora Fonts]     [Fedora Marketing]     [Fedora Management Tools]     [Fedora Mentors]     [Fedora Package Review]     [Fedora R Devel]     [Fedora PHP Devel]     [Kickstart]     [Fedora Music]     [Fedora Packaging]     [Fedora SELinux]     [Fedora Legal]     [Fedora Kernel]     [Fedora OCaml]     [Coolkey]     [Virtualization Tools]     [ET Management Tools]     [Yum Users]     [Yosemite News]     [Gnome Users]     [KDE Users]     [Fedora Art]     [Fedora Docs]     [Fedora Sparc]     [Libvirt Users]     [Fedora ARM]

  Powered by Linux