zebra: uplink tracking and startup delay for EVPN-MH

Local ethernet segments are held in a protodown or error-disabled state
if access to the VxLAN overlay is not ready -
1. When FRR comes up the local-ESs/access-port are kept protodown
for the startup-delay duration. During this time the underlay and
EVPN routes via it are expected to converge.
2. When all the uplinks/core-links attached to the underlay go down
the access-ports are similarly protodowned.

The ES-bond protodown state is propagated to each ES-bond member
and programmed in the dataplane/kernel (per-bond-member).

Configuring uplinks -
vtysh -c "conf t" vtysh -c "interface swp4" vtysh -c "evpn mh uplink"

Configuring startup delay -
vtysh -c "conf t" vtysh -c "evpn mh startup-delay 100"

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
EVPN protodown display -
========================
root@torm-11:mgmt:~# vtysh -c "show evpn"
L2 VNIs: 10
L3 VNIs: 3
Advertise gateway mac-ip: No
Advertise svi mac-ip: No
Duplicate address detection: Disable
  Detection max-moves 5, time 180
EVPN MH:
  mac-holdtime: 60s, neigh-holdtime: 60s
  startup-delay: 180s, start-delay-timer: 00:01:14 <<<<<<<<<<<<
  uplink-cfg-cnt: 4, uplink-active-cnt: 4
  protodown: startup-delay <<<<<<<<<<<<<<<<<<<<<<<
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
ES-bond protodown display -
===========================
root@torm-11:mgmt:~# vtysh -c "show interface hostbond1"
Interface hostbond1 is up, line protocol is down
  Link ups:       0    last: (never)
  Link downs:     1    last: 2020/04/26 20:38:03.53
  PTM status: disabled
  vrf: default
  OS Description: Local Node/s torm-11 and Ports swp5 <==> Remote  Node/s hostd-11 and Ports swp1
  index 58 metric 0 mtu 9152 speed 4294967295
  flags: <UP,BROADCAST,MULTICAST>
  Type: Ethernet
  HWaddr: 00:02:00:00:00:35
  Interface Type bond
  Master interface: bridge
  EVPN-MH: ES id 1 ES sysmac 00:00:00:00:01:11
  protodown: off rc: startup-delay  <<<<<<<<<<<<<<<<<
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
ES-bond member protodown display -
==================================
root@torm-11:mgmt:~# vtysh -c "show interface swp5"
Interface swp5 is up, line protocol is down
  Link ups:       0    last: (never)
  Link downs:     3    last: 2020/04/26 20:38:03.52
  PTM status: disabled
  vrf: default
  index 7 metric 0 mtu 9152 speed 10000
  flags: <UP,BROADCAST,MULTICAST>
  Type: Ethernet
  HWaddr: 00:02:00:00:00:35
  Interface Type Other
  Master interface: hostbond1
  protodown: on rc: startup-delay <<<<<<<<<<<<<<<<
root@torm-11:mgmt:~#
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

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

1 files changed, 30 insertions, 4 deletions

diff --git a/zebra/zebra_evpn_mh.h b/zebra/zebra_evpn_mh.h
index ee162ad486..09af26a3a3 100644
--- a/zebra/zebra_evpn_mh.h
+++ b/zebra/zebra_evpn_mh.h
@@ -195,10 +195,25 @@ struct zebra_evpn_mh_info {
 #define EVPN_NHG_ID_TYPE_BIT (2 << EVPN_NH_ID_TYPE_POS)
 
 	/* XXX - re-visit the default hold timer value */
-#define EVPN_MH_MAC_HOLD_TIME_DEF (18 * 60)
-	long mac_hold_time;
-#define EVPN_MH_NEIGH_HOLD_TIME_DEF (18 * 60)
-	long neigh_hold_time;
+	int mac_hold_time;
+#define ZEBRA_EVPN_MH_MAC_HOLD_TIME_DEF (18 * 60)
+	int neigh_hold_time;
+#define ZEBRA_EVPN_MH_NEIGH_HOLD_TIME_DEF (18 * 60)
+
+	/* During this period access ports will be held in a protodown
+	 * state
+	 */
+	int startup_delay_time; /* seconds */
+#define ZEBRA_EVPN_MH_STARTUP_DELAY_DEF (3 * 60)
+	struct thread *startup_delay_timer;
+
+	/* Number of configured uplinks */
+	uint32_t uplink_cfg_cnt;
+	/* Number of operationally-up uplinks */
+	uint32_t uplink_oper_up_cnt;
+
+	/* These protodown bits are inherited by all ES bonds */
+	enum protodown_reasons protodown_rc;
 };
 
 static inline bool zebra_evpn_mac_is_es_local(zebra_mac_t *mac)
@@ -258,5 +273,16 @@ void zebra_evpn_mh_config_write(struct vty *vty);
 int zebra_evpn_mh_neigh_holdtime_update(struct vty *vty,
 		uint32_t duration, bool set_default);
 void zebra_evpn_es_local_br_port_update(struct zebra_if *zif);
+extern int zebra_evpn_mh_startup_delay_update(struct vty *vty,
+					      uint32_t duration,
+					      bool set_default);
+extern void zebra_evpn_mh_uplink_oper_update(struct zebra_if *zif);
+extern void zebra_evpn_mh_update_protodown_bond_mbr(struct zebra_if *zif,
+						    bool clear,
+						    const char *caller);
+extern bool zebra_evpn_is_es_bond(struct interface *ifp);
+extern bool zebra_evpn_is_es_bond_member(struct interface *ifp);
+extern void zebra_evpn_mh_print(struct vty *vty);
+extern void zebra_evpn_mh_json(json_object *json);
 
 #endif /* _ZEBRA_EVPN_MH_H */