Assume you have checked that there is no underlying connectivity problem? Can you crack the debug up on the BGP process on both sides... also check no wierd filters on the switches and any firewalls or inline devices that someone installed that might interfere?
Sent from my iPhone > On 3 Mar 2019, at 03:55, "[email protected]" <[email protected]> wrote: > > Evening All > > Having a really strange one here, where keepalive messages seem to be getting > lost between 2 MX80 routers doing external BGP to each other. > > The BGP session comes up ok, and then drops 30 seconds later as the other > side does seem to be recieving the keepalive. > > Now to make things more strange is I have seen this happen before recently > with another pair of mx80's one of which is talking to one of the current > pair fine. > > So we have MX80's at ISP1-4 > > ISP1-ISP2 is having this issue, these are both running old versions of Junos > and had previously been put down to this and the link had been given up on. > > ISP2-ISP3 is working fine and has been for nearly a year > > Now we have ISP3-ISP4 having the same issue. Both these routers are running > the latest version of JUNOS. > > Topology of ISP1-ISP2 is > > MX80 <-> Ubiquiti 10G <-> Extreme 10G <-> MX80 > > > Topology of ISP2-ISP3 > > MX80 <-> Extreme 10G(as above) <-> MX80 > > Topology of ISP3-ISP4 > > MX80 <-> Juniper EX3300(virtual Chassis <-> MX80 > > Anyone have any ideas on this as I am drawing a blank. > > Regards > >
