From ebccc291865132d2dd03edd2a56d400dd087ef43 Mon Sep 17 00:00:00 2001 From: Christian Poessinger Date: Sun, 12 Dec 2021 12:29:46 +0100 Subject: bgp: T3967: add support for conditional advertisement The BGP conditional advertisement feature uses the non-exist-map or the exist-map and the advertise-map keywords of the neighbor advertise-map command in order to track routes by the route prefix. non-exist-map ============= * If a route prefix is not present in the output of non-exist-map command, then advertise the route specified by the advertise-map command. * If a route prefix is present in the output of non-exist-map command, then do not advertise the route specified by the addvertise-map command. exist-map ========= * If a route prefix is present in the output of exist-map command, then advertise the route specified by the advertise-map command. * If a route prefix is not present in the output of exist-map command, then do not advertise the route specified by the advertise-map command. This feature is useful when some prefixes are advertised to one of its peers only if the information from the other peer is not present (due to failure in peering session or partial reachability etc). The conditional BGP announcements are sent in addition to the normal announcements that a BGP router sends to its peer. CLI nodes can be found under: * set protocols bgp neighbor address-family conditional-advertisement * set protocols bgp peer-group

address-family conditional-advertisement --- data/templates/frr/bgpd.frr.tmpl | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'data') diff --git a/data/templates/frr/bgpd.frr.tmpl b/data/templates/frr/bgpd.frr.tmpl index 9bb42fd2d..45e0544b7 100644 --- a/data/templates/frr/bgpd.frr.tmpl +++ b/data/templates/frr/bgpd.frr.tmpl @@ -146,6 +146,17 @@ {% if afi_config.as_override is defined %} neighbor {{ neighbor }} as-override {% endif %} +{% if afi_config.conditionally_advertise is defined and afi_config.conditionally_advertise is not none %} +{% if afi_config.conditionally_advertise.advertise_map is defined and afi_config.conditionally_advertise.advertise_map is not none %} +{% set exist_non_exist_map = 'exist-map' %} +{% if afi_config.conditionally_advertise.exist_map is defined and afi_config.conditionally_advertise.exist_map is not none %} +{% set exist_non_exist_map = 'exist-map ' ~ afi_config.conditionally_advertise.exist_map %} +{% elif afi_config.conditionally_advertise.non_exist_map is defined and afi_config.conditionally_advertise.non_exist_map is not none %} +{% set exist_non_exist_map = 'non-exist-map ' ~ afi_config.conditionally_advertise.non_exist_map %} +{% endif %} + neighbor {{ neighbor }} advertise-map {{ afi_config.conditionally_advertise.advertise_map }} {{ exist_non_exist_map }} +{% endif %} +{% endif %} {% if afi_config.remove_private_as is defined %} neighbor {{ neighbor }} remove-private-AS {% endif %} -- cgit v1.2.3