Please see the link below, that ugly hack should be disabled asap on all your
Cisco boxes:
https://supportforums.cisco.com/t5/lan-switching-and-routing/spanning-tree-etherchannel-guard-misconfig/td-p/1147273
MD
On Fri, 6 Apr 2018 11:31:17 -0700, Keenan Tims wrote
> What it's telling you is
Hi,
we're experiencing severe packet loss for downloads from Amazon AWS via Telia
network, tcpdump regularly shows multiple missing packets triggering SACKs like
this:
08:33:48.935415 IP 147.175.167.x.57668 > 54.231.33.x.443: Flags [.], ack
1051088, win 16384, options [nop,nop,sack 4
Many switches based on BCM Trident ASIC allow you to configure 4 consecutive
SFP+ ports as 40G link (not LACP, but using real hardware 40G framing).
In such case, you can plug 4 DWDM SFP+ modules directly into the switch, without
the need for any reformer.
M.
On Mon, 5 Feb 2018 20:03:33
On Mon, 19 Jun 2017 13:26:55 -0500, Colton Conor wrote
[snip]
> Maybe I should just ditch the 40G QSFP+ optics and use all 10G optics,
> but the switches I am using have 48 10G SFP+ ports and 6 QSFP+ ports
> built in. I know there are 40G breakout cables, but the whole point of
> 40G is to
On Wed, Nov 30, 2016 at 11:58:06AM -0500, Lee wrote:
> On 11/30/16, Mikael Abrahamsson wrote:
> > If your switch is the typical small-buffered-switch that has become more
> > and more common the past few years, then the entire switch might have
> > buffer to keep packets for
On Sat, 22 Oct 2016 21:29:22 +0200, Mark Tinka wrote
> On 21/Oct/16 19:02, Javier Solis wrote:
> > With that said, what are the best options to be able to cost effectively
> > scale without using vlans and maintaining a routed core? What technology
> > would someone suggest (mpls, vxlan,etc) to
> Compared to MPLS, a L2 solution with 100 Gb/s interfaces between
> core switches and a 10G connection for each buildings looks so much
> cheaper. But we worry about future trouble using Trill, SPB, or other
> technologies, not only the "open" ones, but specifically the proprietary
> ones based
Wait for switches with BCM Tomahawk ASICs.
They'll support exactly what you're looking for.
M.
On Wed, 08 Apr 2015 21:01:59 +0200, Piotr wrote
Hi,
There is something like this on market ? Looking for standalone switch,
1/2U, ca 40 ports 10Gb/s and about 4 ports 100Gb/s fixed or as a
On Mon, Jan 19, 2015 at 09:37:35PM -0500, Phil Bedard wrote:
I think in fairly short order both TRILL and 802.1AQ will be depercated in
place of VXLAN and using BGP EVPN as the control plane ala Juniper
QFX5100/Nexus 9300.
We also evaluated VXLAN for IXP deployment, since Trident-2
On Sat, Jan 17, 2015 at 09:15:04PM +0200, Saku Ytti wrote:
On (2015-01-17 12:02 +0100), Marian Ďurkovič wrote:
Our experience after 100 days of production is only the best - TRILL setup
is pretty straightforward and thanks to IS-IS it provides shortest-path
IP-like routing for L2
Last year we installed four 1RU TRILL switches in SIX - see
http://www.six.sk/images/trill_ring.png
Our experience after 100 days of production is only the best - TRILL setup
is pretty straightforward and thanks to IS-IS it provides shortest-path
IP-like routing for L2 ethernet packets over
On Tue, 17 Mar 2009 10:39:13 -0500, Leo Bicknell wrote
So at the end of the day, we'll again have a system which is unable to
achieve good performance over high BDP paths, since with reduced buffers
we'll have an underbuffered bottleneck in the path which will prevent full
link
On Mon, Mar 16, 2009 at 09:09:35AM -0500, Leo Bicknell wrote:
Many edge devices have queues that are way too large.
What appears to happen is vendors don't auto-size queues. Something
like a cable or DSL modem may be designed for a maximum speed of
10Mbps, and the vendor sizes the queue
.
--
Marian Ďurkovič network manager
Slovak Technical University Tel: +421 2 571 041 81
Computer Centre, Nám. Slobody 17 Fax: +421 2 524 94 351
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