Hello there outside of snow:-),
i will setup an AS20 - 2 uplinks to as10 and as30.
also i recive full-table from as10 and as30. from as30 over community 30:10.
now i will forward the full-table from as10 to as30 over community 40:10 and of course my own prefixes to both as. to as10 without community, to as30 over community 40:20
Have you any filter suggestions? In BGP "updates sent" will stay on 1-3 .....
redistribute other bgp ist on.