Delete all BGP communities except
Hello, Is it possible to delete all BGP communities from prefixes learned from a specific BGP session except ones that start with a given value? For example something like: if (bgp_path ~ 64496) then { bgp_large_community.delete([(!64496, *, *)]); } I haven't tested this syntax, but I can't imagine it would work. I'm mostly curious if there's a concept of "except" when deleting BGP communities.
Hello, Take a look at the "filter" function. I think it is what you want. On Thu, Oct 29, 2020 at 3:26 PM Brooks Swinnerton <bswinnerton@gmail.com> wrote:
Hello,
Is it possible to delete all BGP communities from prefixes learned from a specific BGP session except ones that start with a given value? For example something like:
if (bgp_path ~ 64496) then { bgp_large_community.delete([(!64496, *, *)]); }
I haven't tested this syntax, but I can't imagine it would work. I'm mostly curious if there's a concept of "except" when deleting BGP communities.
Hi Alexander, Yes, I think the example code that I shared would be present in a filter function. Specifically the question is with respect to filtering out all BGP communities *except* one that starts with a given value. On Thu, Oct 29, 2020 at 11:35 AM Alexander Zubkov <green@qrator.net> wrote:
Hello,
Take a look at the "filter" function. I think it is what you want.
On Thu, Oct 29, 2020 at 3:26 PM Brooks Swinnerton <bswinnerton@gmail.com> wrote:
Hello,
Is it possible to delete all BGP communities from prefixes learned from
a specific BGP session except ones that start with a given value? For example something like:
if (bgp_path ~ 64496) then { bgp_large_community.delete([(!64496, *, *)]); }
I haven't tested this syntax, but I can't imagine it would work. I'm
mostly curious if there's a concept of "except" when deleting BGP communities.
Hi, As far as I know, it should be possible: https://bird.network.cz/?get_doc&v=20&f=bird-5.html#type-set So you probably want something like: bgp_large_community.filter( [ (64496, *, *) ] ); On Thu, Oct 29, 2020 at 5:33 PM Brooks Swinnerton <bswinnerton@gmail.com> wrote:
Hi Alexander,
Yes, I think the example code that I shared would be present in a filter function. Specifically the question is with respect to filtering out all BGP communities except one that starts with a given value.
On Thu, Oct 29, 2020 at 11:35 AM Alexander Zubkov <green@qrator.net> wrote:
Hello,
Take a look at the "filter" function. I think it is what you want.
On Thu, Oct 29, 2020 at 3:26 PM Brooks Swinnerton <bswinnerton@gmail.com> wrote:
Hello,
Is it possible to delete all BGP communities from prefixes learned from a specific BGP session except ones that start with a given value? For example something like:
if (bgp_path ~ 64496) then { bgp_large_community.delete([(!64496, *, *)]); }
I haven't tested this syntax, but I can't imagine it would work. I'm mostly curious if there's a concept of "except" when deleting BGP communities.
participants (2)
-
Alexander Zubkov -
Brooks Swinnerton