On Tue, 17 Apr 2012, Ondrej Zajicek wrote:
On Fri, Apr 13, 2012 at 05:00:40PM -0300, Henrique de Moraes Holschuh wrote:
Well, we cannot have clist literals, only pair set literals. That makes this limitation of clist operations rather unfortunate.
Can BIRD be extended to allow operating on clists using pair sets?
I.e. clist.add(pair set), clist.delete(pair set)...
You could use clist.delete(pair set) or clist.filter(pair set). Only nonimplemented think is clist.add(pair set), which is operation that would expand compact representation of pair sets to explicit representation of clist, which is generally expensive and that may not be obvious to some users. For example, even restricted user from bird client could exhaust all memory by using show route command with some filter containing clist.add([(*,*)]).
If we explicitly limit number of communities in clist, it could be done, but it is probably better idea to implement clist literals, which may be also useful for explicitly setting bgp_community with initial clist.
Well, clist literals would solve my use case, and also the use case presented in this thread. So that might indeed be a better option. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh