Hello List, at the moment we try to implement an fine granulary filter mechanism in our Bird OSPF setup. We ask ourselfes if anyone has implementet bitwise operations in Bird filters which is not in official code. If not, are there any plans to implement such an feature in Bird filters or should we try it to implement on our own and contribute this to the mailing list? For better understanding i include an example: We use the ospf_tag attribute as an group identifier. at the moment we have 4 groups. There are routers which could belong to more than one group. So we would like to combine the groups in any way. The most efficient way to reach this is an bitwise operation. -- Mit freundlichen Grüßen --------------------------------- Daniel Wendler