zebra: Ethernet segment management and support for MAC-ECMP

1. Local ethernet segments are configured in zebra by attaching a
local-es-id and sys-mac to a access interface -
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
!
interface hostbond1
 evpn mh es-id 1
 evpn mh es-sys-mac 00:00:00:00:01:11
!
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
This info is then sent to BGP and used for the generation of EAD-per-ES
routes.

2. Access VLANs associated with an (ES) access port are translated into
ES-EVI objects and sent to BGP. This is used by BGP for the
generation of EAD-EVI routes.

3. Remote ESs are imported by BGP and sent to zebra. A list of VTEPs
is maintained per-remote ES in zebra. This list is used for the creation
of the L2-NHG that is used for forwarding traffic.

4. MAC entries with a non-zero ESI destination use the L2-NHG associated
with the ESI for forwarding traffic over the VxLAN overlay.

Please see zebra_evpn_mh.h for the datastruct organization details.

Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/zebra/zserv.h b/zebra/zserv.h
index f2a452381..e90446078 100644
--- a/zebra/zserv.h
+++ b/zebra/zserv.h
@@ -194,6 +194,10 @@ struct zserv {
 	uint32_t v6_nh_watch_rem_cnt;
 	uint32_t vxlan_sg_add_cnt;
 	uint32_t vxlan_sg_del_cnt;
+	uint32_t local_es_add_cnt;
+	uint32_t local_es_del_cnt;
+	uint32_t local_es_evi_add_cnt;
+	uint32_t local_es_evi_del_cnt;
 	uint32_t error_cnt;
 
 	time_t nh_reg_time;