[AusNOG] 10GBs

[Josh Tipping]

Hi Burt,

Lots of good info here around Layer 1 issues (SFP's, cables etc etc) which is worth checking. But you could easily have a more software-oriented issue, without knowing more about your problems - i.e perhaps Hypervisor to switch is not configured in a manner that the hypervisor, or your switch, likes. Are you running multiple 10G ports to each server? Does it track that packets are lost over certain physical links but not others, machines drop packets after vmotion, things like this? Is any type of etherchannel/lacp configured? How is spanning tree configured on the switch?

If you can link up some direct hosts, one port each, no hypervisors or other complexities, and smash the switch with iPERF or something, and it works just fine, then you probably have a configuration/software issue rather than optics/cables/NIC's.

10G definitely doesn't have to be difficult - but the choice of switch might be an issue. Ive never used a ZyXEL switch - but something more enterprise grade more commonly used with Hypervisors/in DC's, will almost certainly avoid some software weirdness of a cheap switch. Better 10G switches really don't have to cost a fortune these days.

Thanks and regards,
Josh Tipping
Chief Technical Officer | iCITA

From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Burt Mascareigne
Sent: Wednesday, 8 November 2017 1:23 PM
To: <ausnog at lists.ausnog.net> <ausnog at lists.ausnog.net>
Subject: [AusNOG] 10GBs

Hi Noggers

We're having "fun" with 10GB NICS, Switches and SFPs.

We can't work out which is causing drop out, packets.. we are somewhat certain packets are vanishing into the Ether..

We don't know which is causing what.

I'm not after troubleshooting, I am curious what people's view on this.

Do you buy 1 Vendor for all your 10GBs, A-Z, is there some hidden rule about mixing vendors, is this all trial and error (and very expensive at best)?

Any recommendations on set ups?  Preferred Vendors, Vender to avoid like the plague.

We're talking Servers to Switch kind of thing.  Not SANs etc.  Good ol' HyperVisor to the switch.

Thanks





Regards,


Burt Mascareigne
Mobile 0414 450 962   Office (02) 9965 5422
Address Level 19, 1 O'Connell Street, Sydney NSW 2000
Web http://www.stormnetwork.com.au<http://www.stormnetwork.com.au/>
[01-300x70]

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ausnog.net/pipermail/ausnog/attachments/20171109/a4696683/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 5873 bytes
Desc: image001.png
URL: <http://lists.ausnog.net/pipermail/ausnog/attachments/20171109/a4696683/attachment.png>