Re: [uknof] fs reliability
Interestingly I have been seeing similar failures lately, but on other 3rd party optics. Not had a failed FS.com optic yet. Typically it has been resolved by just reseating the optic. Oli -Original Message- From: uknof On Behalf Of Stuart Henderson Sent: 09 August 2018 12:34 To: uknof Subject: [uknof] fs reliability I've been trying out FS transceivers. Nothing fancy, just 10Gb LR SFP+ for data centre interconnects etc. Out of 8 deployed there have been 2 where the link has failed, then the reported Tx power from DOM has shown as -40.0 dBm - one shortly after deploying, one after ~2 months. Worse still it's intermittent, they have come back to life afterwards. fs support think this is faulty modules rather than a switch problem. I wondered if anyone else is seeing a similar failure mode, or what sort of failure rate you're seeing? (FS themselves are claiming <1.5% but then they would, wouldn't they..) Should I just buy flexoptix? They are over twice the price though it doesn't take many train tickets to London to cover that ..
Re: [uknof] MTP Single Mode cables - Wanted
MTP is generally only available in OM3 and OM4 in my experience, never seen them in singlemode. We buy them from swalecomponents.com (Siemon branded). On 22 August 2016 at 22:09, Charlie Boisseau wrote: > > On 22 Aug 2016, at 20:56, Phil Bartlett > wrote: > > > > I'm needing to buy some MTP (Female) 12 way fanout cables (Single mode > LC) > > > > Can anyone recommend anyone in the London or surrounding area? > > > > http://www.completeconnect.co.uk/ > > Can vouch for quality. Easy to work with. Have UK assembly facility, and > can outsource to China for bulk orders. > > C > > > -- Oliver Elliott Senior Network Specialist IT Services, University of Bristol t: 0117 39 (41131)
Re: [uknof] JANET DoS
Janet are being cagey about the details of the attack because the attackers keep adapting attack vectors based on their responses. We've also seen a lot of DNS loss here too fwiw. On 8 December 2015 at 10:35, Paul Thornton wrote: > Morning folks, > > I'm sure those involved are busy firefighting, but the JANET DoS attack > seems to have ratcheted up a gear today, or certainly the end user impact > has. > > The site I'm currently at seems to have external connectivity but 90% loss > on DNS. Does anyone know if they are filtering udp/53 (which would make > sense if this is a spoofed reflection attack)? > > Paul. > > -- Oliver Elliott Senior Network Specialist IT Services University of Bristol e: oliver.elli...@bristol.ac.uk t: 0117 39 (41131)
