Hi Melanie, I am usually using quad 1 or 8, rather than pointing DNS at the router - thats if Im too lazy to run my own in-house resolver. :-)
I do have BIND running on a raspberry pi, and it also suffers an inability to do lookups at the same time, which might just be it getting caught up in the same symptom. Tom On Wed, 22 May 2019 at 14:32, Melanie Gajic <[email protected]> wrote: > Hi Tom > > > > If you change the IOS version, you should double check it with the bug > search tool. For example 16.5 has a bug like Delay in DNS resolve after > network flap 😊 . > > Usually it is either config or firmware related. Have you tried using a > different DNS server and not going through the auto assignment ? > > > > > > > > Regards, > > > > *Melanie Gajic * > > > > *From: *uknof <[email protected]> on behalf of Tom Storey < > [email protected]> > *Date: *Wednesday, 22 May 2019 at 14:11 > *To: *James Bensley <[email protected]> > *Cc: *"[email protected]" <[email protected]> > *Subject: *Re: [uknof] Cisco 887VA - forwarding "kind of breaks" after a > week > > > > *CAUTION:* This email originated from outside of the organization. Do not > click links or open attachments unless you recognize the sender and know > the content is safe. > > > > Hey James, > > > > controller VDSL 0 > > operating mode vdsl2 > > firmware filename flash:VA_A_39m_B_38h3_24h_o.bin > > modem UKfeature > > ! > > > > This particular image was recommended to me by someone that is a bit more > familiar with BT last mile access than I am. > > > > IOS itself is down somewhere in the 15.6's. My usual response to wierd > behaviour is to try upping the IOS version and see if it goes away. That is > what I intend to try next - as soon as I can get my hands on a more recent > image. Seems strange that the modem would prevent DNS from working though? > > > > Tom > > > > On Wed, 22 May 2019 at 13:29, James Bensley <[email protected]> wrote: > > On Wed, 22 May 2019 at 09:48, Tom Storey <[email protected]> wrote: > > > > Hi all, wondering if anyone has come across this and knows how to fix it. > > > > I have a Cisco 887VA at home, hooked up to a BT supplied VDSL line > (cabinet at end of street), what I believe is called "fibre", but my ISP is > Zen. > > > > Ive noticed that very consistently after about a week (7-8 days), > forwarding partially breaks in some way. Im not sure if it is the Cisco or > something somewhere else, but I didnt have the same issue with the Zen > supplied FritzBox, so seems coincidental that it is the Cisco... > > > > The biggest thing I have noticed is that DNS seems to break. e.g. I > could have an audio stream playing, and it will continue to stream just > fine, but you wont be able to browse or resolve any other hostnames. I can > also still ping anything by IP just fine. > > > > I have a friend that is working for a managed service provider who has > an installed base of these routers and says they are also working on much > the same issue. > > > > If anyone has any suggestions, Im all ears! > > > > Thanks > > Tom > > Hi Tom, > > On some of these smaller CPEs you can upgrade the modem firmware > seperatly from the IOS image. Are you running latest and greatest > modem firmware as well as IOS? > > Cheers, > James. > >
