On 7.7.2010 16:00, Владислав Гришин wrote:
Why filters export_net_1 and export_net_2 work equally, and/but filters export_default_1 and export_default_1 on a miscellaneous? Why the filter export_default_2 "does not work" also as the filter export_net_2 works?
Hi Vladislav, this clause: net ~ 1.0.0.0/8 means "NET is subnetwork (of network itself) of 1.0.0.0/8". So networks like 1.1.0.0/16 or 1.0.0.0/8 are accepted by the filter. But this clause: net ~ [ 1.0.0.0/8 ] means "NET is a member of prefix list (prefix list is in []) with a single member 1.0.0.0/8. So basically only 1.0.0.0/8 is matched. That's why export_default_1 accepts just default route (0.0.0.0/0) and export_default_2 accepts default route and all subnetworks. So your filters export_net_1 and export_net_2 are not equal. The filter export_net_2 would e.g. accept route 12.12.12.13/32, but that is probably not in your routing table. "net ~ [ 1.0.0.0/8]" is equal with "net = 1.0.0.0/8" Ondrej F.
Vladislav Grishin