Hi,
this would brake OSPF completely. You can only filter routes between
area's and not within. This is fundamental for link state protocols like
OSPF
Eelco Nieuwstad
On 27-01-17 08:53, Steve Leung wrote:
Hi,
Using OSPF, when receiving some routes from a network interface, by
default all routes will be re-advertised to other interfaces within
the same area without applying the filter rules.
Say in the below example.
===
protocol ospf myospf {
table t_ospf;
import filter ifilter;
export filter ofilter;
area 0 {
interface "eth*" {
hello 10; retransmit 2; wait 10; dead 300;
cost 10;
};
};
}
===
Routes received from "eth1" will be _forwarded_ to "eth2" and bypassed
all the filters. Is it possible to configure bird.conf so only some of
the routes will be re-advertised? (aka apply filters to interface
within the same OSPF area)
Creating multiple ospf instance and treat the routes as "external
routes" (so filter will apply) is not a good idea for me because the
environment is quite dynamic, may even have hundreds of dynamic
virtual interface, and I hope I do not need to edit the config file
all the time.
Thank you so much for your time.
Best regards,
Steve
