ppp and BGP script

RouterOS Scripting
1

I am trying to create a script that when a client connects through PPPoE, their remote address is added to BGP networks. I created a ppp profile and added the following scripts to it but they never seem to get called.

On Up

/routing bgp network add network=$remote-address/32 synchronize=no

On Down

routing bgp network remove [:find where network=$remote-address/32]

Export of config sanatized

/ip pool
add name="PPPoE Pool" ranges=192.168.0.20-192.168.0.254
/ppp profile
add dns-server=8.8.8.8,8.8.4.4 local-address=192.168.0.1 name=profile1 on-down="local remoteAddr \$\"remote-address\"\r\
    \n/routing bgp network remove [:find where network=\$remoteAddr/32]\r\
    \n" on-up="/routing bgp network add network=\$remote-address/32 synchronize=no\r\
    \n" remote-address="PPPoE Pool" session-timeout=1d
/interface pppoe-server server
add default-profile=profile1 disabled=no interface=ether1 one-session-per-host=yes service-name=PPPoE
2

Be careful with that, see slide 16+ https://mum.mikrotik.com/presentations/EU17/presentation_4058_1490948376.pdf

3

Thanks for that link. That is something we are watching. We will have rough 20 PPPoE connections max per edge router. With over 100 edge routers, this is why we dont want to dedicate a subnet per site. Instead we want to use the /32. It would be nice if the Mikrotiks had PPPoE Relay like the Ubiquiti CPEs. We would then bring it back to a central router. We have it designed as a client can plug into our network and pull a NATed address or pay a couple dollars extra for a public static served through PPPoE. This is all automated through our billing software.

4

Wouldn’t using a /27 be a compromise?