Re: [44net] Mikrotik help needed

Hi Ian, I had something similar when I set up my Mikrotik gateway. It turns out that the set of routes received from UCSD includes a route to UCSD itself - which was breaking RIPs ability to receive routes and causing oscillation as you are seeing. After talking to Marius about it, my fix was to put in the following prefix-list and set "in-prefix-list=ampr-in" on my RIP interface /routing prefix-lists add action=discard chain=ampr-in comment="stop us creating a tunnel back to UCSD which breaks RIP" prefix=44.0.0.1/32 prefix-length=32 add chain=ampr-in prefix=44.0.0.0/9 prefix-length=9-32 add chain=ampr-in prefix=44.128.0.0/10 prefix-length=10-32 add action=discard chain=ampr-in Only the first entry in that prefix list is required to break the cycle of oscillation, the rest are there to reject any non-44net addresses if UCSD were to announce them to me. I hope this helps, Paul M0PLL On 27/05/2020 19:56, Ian Redden via 44Net wrote: