BGP sessions towards internal route reflectors were up and established for almost one month. After adding the new BGP group, ALL sessions went down/reset and are now up and established.
The strange thing is, we don't see this behaviour in MX-960. We have several MX-104 and the issue happened in two of them, were we implemented new BGP groups.
It seems to me that this issue is MX-104 specific. Can anybody try this on a real device? (in lab, please!) The idea is to validate this behaviour.
Thanks.