diff options
| author | Anuradha Karuppiah <anuradhak@cumulusnetworks.com> | 2020-05-08 19:24:56 -0700 |
|---|---|---|
| committer | Anuradha Karuppiah <anuradhak@nvidia.com> | 2020-11-24 11:06:08 -0800 |
| commit | c589d84746d96c1714582e437eb9cec691795252 (patch) | |
| tree | 2ca0ecf6ec0896991b2e3a3155da69d592f5d308 /bgpd/bgp_evpn_private.h | |
| parent | bbc57c6cfac1d471a8d0293cd30af59facdbd8f4 (diff) | |
bgpd: L3NHG infrastructure for host routes in EVPN
ES-VRF entries are maintained for the purpose of L3-NHG creation -
1. Each ES-EVI entry is associated with a tenant VRF. This associaton
triggers the creation of an ES-VRF entry.
2. Type-2/MAC-IP routes are imported into a tenant VRF and programmed as
a /32 or host route entry in the dataplane. If the destination of
the host route is a remote-ES the route is programmed with the
corresponding (keyed in by {vrf,ES-id}) L3-NHG.
3. The reason for this indirection (route->L3-NHG, L3-NHG->list-of-VTEPs)
is to avoid route updates to the dplane when a remote-ES link flaps i.e.
instead of updating all the dependent routes the NHG's contents are
updated. This reduces the amount of dataplane updates (fewer nhg updates vs.
route updates) allowing for a faster failover.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Diffstat (limited to 'bgpd/bgp_evpn_private.h')
| -rw-r--r-- | bgpd/bgp_evpn_private.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/bgpd/bgp_evpn_private.h b/bgpd/bgp_evpn_private.h index c47576c00c..e8e68c8387 100644 --- a/bgpd/bgp_evpn_private.h +++ b/bgpd/bgp_evpn_private.h @@ -218,6 +218,9 @@ static inline struct list *bgpevpn_get_vrf_import_rtl(struct bgpevpn *vpn) return vpn->bgp_vrf->vrf_import_rtl; } +extern void bgp_evpn_es_evi_vrf_ref(struct bgpevpn *vpn); +extern void bgp_evpn_es_evi_vrf_deref(struct bgpevpn *vpn); + static inline void bgpevpn_unlink_from_l3vni(struct bgpevpn *vpn) { /* bail if vpn is not associated to bgp_vrf */ @@ -227,6 +230,8 @@ static inline void bgpevpn_unlink_from_l3vni(struct bgpevpn *vpn) UNSET_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS); listnode_delete(vpn->bgp_vrf->l2vnis, vpn); + bgp_evpn_es_evi_vrf_deref(vpn); + /* remove the backpointer to the vrf instance */ bgp_unlock(vpn->bgp_vrf); vpn->bgp_vrf = NULL; @@ -255,6 +260,8 @@ static inline void bgpevpn_link_to_l3vni(struct bgpevpn *vpn) if (bgp_vrf->l3vni && !CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY)) SET_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS); + + bgp_evpn_es_evi_vrf_ref(vpn); } static inline int is_vni_configured(struct bgpevpn *vpn) |