The plot thickens!
This is London > Edinburgh over LINX LON1 and private peering in Edinburgh. Interesting how it just seems to be afternoons, and not weekends. This pattern continues for a few weeks beforehand. - A On Mon, Oct 15, 2018, at 8:51 AM, Chris Malton wrote: > Hi Alfie, > > It appears that 70-80ms to their router is what I was seeing from my > office in Southampton, not through it from Gatwick (I have too many > damned graphs now!).> > This was last night: > > > > You can safely ignore the packet loss around 2150-2205 - that was > a.n.other incident entirely (one of the ones I'm diagnosing for said > customer)!> > Not seeing anything today yet, however here's the above destination > for the last 10 days:> > > > Do these match with anything you're seeing? > > Regards, > > Chris > > > On 14/10/18 23:10, Alfie Pates wrote: >> I’ve been seeing some unusual latencies recently too; can you share >> some graphs and I’ll compare with mine!>> >> - A >> >> >> On Sun, Oct 14, 2018, at 9:22 PM, Chris Malton wrote: >> > Hi all, >> > >> > I've been diagnosing a load of issues with a client service >> > recently,>> > and part of that's led to adding Smokeping for literally >> > everything.>> > >> > Alas, that's turned up rather more than I had expected it to - >> > some of>> > which doesn't appear to be in my control or my DC's control or >> > my >> > client's control either - and it's skewing some of the >> > measurements!>> > >> > Of an evening, and at weekends (i.e. peak time internet usage) >> > for at>> > least the last week or so, I've been seeing very high latency on >> > round>> > trips from my rack in 4D in Gatwick to destinations in >> > JISC/JaNET. That>> > seems to be the only affected route for me, but is >> > the only one >> > via TI>> > Sparkle that I've currently found. There's a little bit of >> > packet loss>> > in the mix as well (~0.1%), but nothing I'm immediately >> > concerned >> > about.>> > >> > I've dug more into this over this weekend, and have identified that>> > >> > AS6762 appears to be where the issues lie - specifically, the >> > moment>> > traffic hits TI Sparkle's LINX router (2001:7f8:4::1a6a:1) I >> > see an>> > 80-90ms latency increase at peak times. >> > >> > Is anyone else seeing high latency on routes via TI Sparkle >> > across Linx>> > and/or is there a friendly contact at TI Sparkle I can >> > discuss this>> > with? (Separately, I've asked 4D to peer directly with >> > JISC on >> > LINX ->> > but that might take some time to get sorted) >> > >> > Thanks in advance. >> > >> > Regards, >> > >> > Chris Malton >> > >> > >> >> This email has been scanned by the MailScanner e-mail security >> system.> > >
