The function return true but it could not be export

[Maria Matějka]

Hello!

I'd try:
* "show route noexport all" to see what may be the reason to drop the route
* add some logging to the filter to see why it is dropped

BTW, what version are you using? As far as I remember, the BGP attributes are behaving differently on export in 1.6 and 2.0

Maria

On June 6, 2021 5:24:38 AM GMT+02:00, "智慧雨泽" <zhihuiyuze at gmail.com> wrote:
>Hi,The function i wrote correctly returns net.
>
>bird> show route 2602:feda:ab2::/48 where bgp_export_all()
>Table master6:
>2602:feda:ab2::/48   unicast [LL_IX 02:19:31.236] * (100) [i]
>       via 2602:feda:ab2::1 on ll-ix
>
>But it could be export.
>bird> show route export TOHU_IX for 2602:feda:ab2::/48
>bird>
>
>I think that should be accept
>export filter {
>if bgp_export_all() then accept;
># if (roa_check(r6, net, bgp_path.last_nonaggregated) ~ [ROA_INVALID,
>ROA_UNKNOWN]) then reject;
># if is_bogon_asn() then reject;
># if is_bogon_prefix() then reject;
># accept;
>};
>};
>}
>Why is it not exported?
>The full configuration is.
>
>protocol bgp TOHU_IX {
>local as LOCAL_ASN;
>description "tohu ix IX-VPS BGP";
>direct;
>source address 2602:feda:ab5::1;
>neighbor 2602:feda:ab6::1%'tuhu-ix' as 141011;
>ipv6 {
>next hop self;
>import filter {
>if is_bogon_asn() then reject;
>if is_bogon_prefix() then reject;
>if (roa_check(r6, net, bgp_path.last_nonaggregated) = ROA_VALID) then
>reject
>;
>accept;
>};
>export filter {
>if bgp_export_all() then accept;
># if (roa_check(r6, net, bgp_path.last_nonaggregated) ~ [ROA_INVALID,
>ROA_UNKNOWN]) then reject;
># if is_bogon_asn() then reject;
># if is_bogon_prefix() then reject;
># accept;
>};
>};
>}
>
>
>function bgp_export() {
>if net !~ OUR_PREFIXES then return false;
>if is_bogon_asn() then return false;
>if is_bogon_prefix() then return false;
>if net_len_too_long() then {
># print "net ", net, " prefix too long";
>return false;
>}
>if proto = "BGP_Prefix" then return true;
>if proto = "LL_IX" then{
>if bgp_path.len = 0 then{
>return true;
>}
>}
>if proto = "TOHU_IX" then{
>if bgp_path.len = 0 then{
>return true;
>}
>}
>return false;
>}
>
>
>function bgp_export_all() {
>if bgp_export() then {
>return true;
>}
>
>if source != RTS_BGP then{
>return false;
>}
>if is_bogon_asn() then return false;
>if is_bogon_prefix() then return false;
>return true;
>}
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