Unfortunately I think you're unlikely to get much of a response to a low-level networking question here; I'd recommend posting a question like that on one of the StackExchange sites (probably https://networkengineering.stackexchange.com/) or in whatever support forums Cisco provides, where you'll have better odds of someone who might be able to confirm your observations and perhaps recommend a solution.
Tim On Thu, May 3, 2018 at 9:52 AM, Joseph, Richard <richard_jos...@mentor.com> wrote: > Hello all, > I was wondering if anyone has seen the following issue. > I am trying to get two programs on the same machine to 'discover' each > other using ActiveMQ. > One starts a broker and the other discovers it. > > However, this does not work in all situations => > > (1) Ran this on a windows 7 machine with no VPN installed - Worked > (2) Ran this on a windows 10 machine with no VPN installed - Worked > (3) Ran this on a windows 10 machine with VPN installed and operating - > Failed > (4) Ran this on a windows 10 machine with VPN installed and but not > operating - Worked > > It looks to me that the Cisco VPN is consuming or blocking multicast > messages. > > This is also indicated by the following: http://windowsasusual. > blogspot.co.uk/2013/01/socket-option-multicast-interface.html > > Has anyone seen something like this before. > > Thanks for help you can give. > > Richard. >
