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 tota
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
{1066840:106
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 +0100,
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 aggr
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 0.1ms or less. So if s
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 b
> 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 on
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
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 introd
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
> &g
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 unti
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
& kind regards,
M.
--
Marian Ďurkovič network manager
Slovak Technical University Tel: +421 2 571 041 81
Computer Centre, Nám. Slo
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