RE: 40G reforming

Looks like you’re right. Too many 7xxx model numbers. Either way, same result. The MAC layer in the switch treats it like a QSFP port would be. From: Tim Jackson [mailto:jackson@gmail.com] Sent: Monday, February 5, 2018 9:11 PM To: Ryan, Spencer Cc: Hunter Fuller

RE: 40G reforming

I'm pretty sure that this is only available on 7150S which is FM6000, not broadcom at all. On Feb 5, 2018 8:00 PM, "Ryan, Spencer" wrote: You don’t use 40G modules at all. Just 4 x 10G SFP+. The Broadcom trident chip is configured at the MAC layer for 40G, so it’s identical

RE: 40G reforming

You don’t use 40G modules at all. Just 4 x 10G SFP+. The Broadcom trident chip is configured at the MAC layer for 40G, so it’s identical to a real 40G port inside. Some more reading: https://www.arista.com/assets/data/pdf/Whitepapers/AgilePorts_over_DWDM_Final.pdf Spencer Ryan | Senior

Re: improving signal to noise ratio from centralized network syslogs

On 2018-02-03 15:49, Scott Weeks wrote: Then, you can watch your network in real time like so (below is all one line): tail -f /var/log/router.log /var/log/switch.log | egrep -vi 'term1|term2|termN' 'egrep -v' takes out all the lines you don't want to see while the syslog messages scroll

Re: improving signal to noise ratio from centralized network syslogs

On Mon, 05 Feb 2018 20:27:13 +, James Bensley said: > On 5 February 2018 at 18:57, wrote: > > On Mon, 05 Feb 2018 10:49:42 -0800, "Scott Weeks" said: > >> I have no knowledge of syslog-ng. Does it do the > >> real time scrolling like I mention? > > > > Use 'tail -f'

Re: improving signal to noise ratio from centralized network syslogs

On 5 February 2018 at 18:57, wrote: > On Mon, 05 Feb 2018 10:49:42 -0800, "Scott Weeks" said: >> I have no knowledge of syslog-ng. Does it do the >> real time scrolling like I mention? > > Use 'tail -f' or similar. The only problem is that with BASH based solutions is

Re: 40G reforming

I suspect that implies that you can just take a 40Gbase-SR4 module and break it out into individual "10G" multi-mode pairs for DWDM use. Has anyone tried this? I'm also very interested in using that strategy. On Mon, Feb 5, 2018 at 1:36 PM Ryan, Spencer wrote: > Indeed. Arista

RE: 40G reforming

Indeed. Arista does (did?) make at least one platform where you can do this. -Original Message- From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Marian Durkovic Sent: Monday, February 5, 2018 2:33 PM To: Baldur Norddahl Cc: nanog@nanog.org Subject:

Re: 40G reforming

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

Re: 40G reforming

Whether a 40G port can be broken into 4x10G is dependent on the router/switch hardware and the optic you use. Good news is that most 40G ports are capable of being broken out into 4x10G, since a 40G port is usually operating as 4x10G internally anyway to the ASIC. The QSFP you'll need would be a

Re: 40G reforming

hey, I want to take advantage of the fact that 40G is transported as four individual streams. Each of the four streams are to be converted from 850 nm to a 1550 DWDM channel (one channel per stream). And the reverse at the other end of the link. You probably want something similar to:

RE: 40G reforming

40G is either 4 x 10G over a single pair, or broken out into 8 fibers in the short or parallel versions. Almost all Ethernet platforms support running most or all of their 40G ports as 1 x 40 or 4 x 10. When using the breakout cables though your options are usually more limited. A 1U switch

RADB - aut-num policy question

Hello all, I'm a bit out of my element on this one and hoping someone can help. I'm putting together an aut-num entry for RADB and have a question about our Comcast peerings. We peer with AS7922 in several sites, but if you look at the actual pathing via bgp.he.net or just the routes

Re: 40G reforming

I may need to clarify that I do not want to break the port into 4x10G as such. To the switch this will be an ordinary 40G link to another switch far away. I want to take advantage of the fact that 40G is transported as four individual streams. Each of the four streams are to be converted from 850

Re: Akamai caches hammering Sophos XG firewalls

* jeremyp...@gmail.com (Jeremy Parr) [Mon 05 Feb 2018, 18:28 CET]: Somewhat OT, but before I was a jack of all trades enterprise sysadmin, I was a jack of all trades ISP sysadmin. I'm seeing an issue at a few sites where I have Sophos XG firewalls deployed where the XG gets hammered on it's

Re: improving signal to noise ratio from centralized network syslogs

On Mon, 05 Feb 2018 10:49:42 -0800, "Scott Weeks" said: > I have no knowledge of syslog-ng. Does it do the > real time scrolling like I mention? Use 'tail -f' or similar. pgppqrj2ic42P.pgp Description: PGP signature

Re: improving signal to noise ratio from centralized network syslogs

--- sh...@short.id.au wrote: In addition to that, you can use some fancy awk colour coding, so you can make it highlight certain lines based on content.. I use this for my e-mail logs, but I’m sure it could be adapted: tail -n 1000 -f /var/log/mail-submission.log | grep smtp.*relay | awk '

Re: improving signal to noise ratio from centralized network syslogs

--- ta...@lanparty.ee wrote: > This is done with the 'logging facility' > command on the devices: > > After defining your syslog server's IP > address and the level of messaging you want > (I set it to debug because I want to see > everything): > > on the routers: logging facility local0 > on

Akamai caches hammering Sophos XG firewalls

Somewhat OT, but before I was a jack of all trades enterprise sysadmin, I was a jack of all trades ISP sysadmin. I'm seeing an issue at a few sites where I have Sophos XG firewalls deployed where the XG gets hammered on it's WAN interface by Akamai hosts with TCP re-transmissions. Anyone at

40G reforming

Hello Is it possible to reform a 40G signal as individual 10G links? The idea is to use a 40G QSFP multimode MTP module such as https://www.fs.com/products/44058.html. Then connect it using a MTP breakout cable such as https://www.fs.com/products/68049.html to get four dual fiber connectors.