problems with vmac : vmac interface go down

I have tested keepalived vrrp 1.2.19 installed on centos 7.1 with vmac

to make it work I have to put these lines in /etc/sysctl.conf :

net.ipv4.conf.all.rp_filter=0
net.ipv4.conf.default.rp_filter=0
net.ipv4.conf.all.arp_ignore=1

when the physical interface go down on the first node (I make shutdown 
on the switch) the second node become master.
then when the the physical interface go up again, the first node become 
master again. but I can't ping virtual address because
the vmac interface (named vrrp1 and vrrp2 in my case) still be down :

[root@dell840 ~]# ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode 
DEFAULT
     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp5s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state 
DOWN mode DEFAULT qlen 1000
     link/ether 00:18:8b:fd:98:be brd ff:ff:ff:ff:ff:ff
3: ens2: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc 
pfifo_fast state UP mode DEFAULT qlen 1000
     link/ether 00:1b:21:4e:8a:00 brd ff:ff:ff:ff:ff:ff
4: ens2.201@ens2: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 
qdisc noqueue state UP mode DEFAULT
     link/ether 00:1b:21:4e:8a:00 brd ff:ff:ff:ff:ff:ff
18: vrrp1@ens2: <BROADCAST,MULTICAST> mtu 1500 qdisc noqueue state DOWN 
mode DEFAULT
     link/ether 00:00:5e:00:01:33 brd ff:ff:ff:ff:ff:ff
19: [email protected]: <BROADCAST,MULTICAST> mtu 1500 qdisc noqueue state 
DOWN mode DEFAULT
     link/ether 00:00:5e:00:01:34 brd ff:ff:ff:ff:ff:ff

I have to do
ip link set dev vrrp1 up
ip link set dev vrrp2 up

to ping work again....

I have added these two lines in a notify_master script

without these two line all is ok as long as the physical interface don't 
go down (I can stop and start keepalived, I can play with priority and 
master/slave work like it did...)

her is my final configuration :

vrrp_instance VI_1 {
     state MASTER
     interface ens2
     use_vmac vrrp1
     vmac_xmit_base
     virtual_router_id 51
     priority 100
     advert_int 1
     authentication {
         auth_type PASS
         auth_pass 1111
     }
     virtual_ipaddress {
         172.16.128.123
     }
     notify_master "/usr/sbin/ip link set dev vrrp1 up"
}



vrrp_instance VI_2 {
     state MASTER
     interface ens2.201
     use_vmac vrrp2
     vmac_xmit_base
     virtual_router_id 52
     priority 100
     advert_int 1
     authentication {
         auth_type PASS
         auth_pass 1111
     }
     virtual_ipaddress {
         192.168.201.100
     }
     notify_master "/usr/sbin/ip link set dev vrrp2 up"
}




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