Re: OpenBGPd: fatal in RDE: aspath_get: Cannot allocate memory

[Laurent CARON]

Le 04/04/2022 à 15:43, Claudio Jeker a écrit :

On Tue, Mar 29, 2022 at 09:53:56AM +0200, Laurent CARON wrote:

Hi,

I'm happily running several OpenBGPd routers (Openbsd 7.0).

After having applied the folloxing filters (to blackhole traffic from
certain countries):

include "/etc/bgpd/deny-asn.ru.bgpd"
include "/etc/bgpd/deny-asn.by.bgpd"
include "/etc/bgpd/deny-asn.ua.bgpd"


# head /etc/bgpd/deny-asn.ru.bgpd
match from any AS 2148 set { localpref 250 nexthop blackhole }
match from any AS 2585 set { localpref 250 nexthop blackhole }
match from any AS 2587 set { localpref 250 nexthop blackhole }
match from any AS 2599 set { localpref 250 nexthop blackhole }
match from any AS 2766 set { localpref 250 nexthop blackhole }
match from any AS 2848 set { localpref 250 nexthop blackhole }
match from any AS 2854 set { localpref 250 nexthop blackhole }
match from any AS 2875 set { localpref 250 nexthop blackhole }
match from any AS 2878 set { localpref 250 nexthop blackhole }
match from any AS 2895 set { localpref 250 nexthop blackhole }

You should really use as-set for this:

as-set ru-set { 2148 2585 2587 ... }

And also not match any (at least I think you don't really want that to
match on ibgp sessions):

match from ebgp AS as-set ru-set set { localpref 250 nexthop blackhole }

If done right you can replace all your rules by one single one.

Hi Claudio,

Thanks for the hints.

Will change the config accordingly and report back.

Cheers,

Laurent