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Также на VRRP интерфейсе можно назначить разные приоритеты для разных юнитов для .

ESR-1(config-vrrp)# priority 102 unit 1
ESR-1(config-vrrp)# priority 101 unit 2

cluster
  cluster-interface bridge 1
  unit 1
    mac-address cc:9d:a2:71:83:78
  exit
  unit 2
    mac-address cc:9d:a2:71:82:38
  exit
  enable
exit

hostname ESR-1 unit 1
hostname ESR-2 unit 2

security zone SYNC
exit
security zone WAN
exit
security zone LAN
exit

bridge 1
  vlan 1
  security-zone SYNC
  ip address 198.51.100.254/24 unit 1
  ip address 198.51.100.253/24 unit 2
  vrrp 1
    ip address 198.51.100.1/24
    group 1
    authentication key ascii-text encrypted 88B11079B51D
    authentication algorithm md5
    enable
  exit
  enable
exit

interface gigabitethernet 1/0/1
  mode switchport
  spanning-tree disable
exit
interface gigabitethernet 1/0/2
  security-zone WAN
  ip address 128.66.0.2/30
  vrrp 3
    ip address 203.0.113.2/30
    group 1
    enable
  exit
exit 
interface gigabitethernet 1/0/3
  security-zone LAN
  ip address 192.0.2.254/24
  vrrp 2
    ip address 192.0.2.1/24
    group 1
    enable
  exit
exit 
interface gigabitethernet 2/0/1
  mode switchport
  spanning-tree disable
exit
interface gigabitethernet 2/0/2
  security-zone WAN
  ip address 128.66.0.1/30
  vrrp 3
    ip address 203.0.113.2/30
    group 1
    enable
  exit
exit 
interface gigabitethernet 2/0/3
  security-zone LAN
  ip address 192.0.2.253/24
  vrrp 2
    ip address 192.0.2.1/24
    group 1
    enable
  exit
exit 

security zone-pair SYNC self
  rule 1
    action permit
    match protocol icmp
    enable
  exit
  rule 2
    action permit
    match protocol vrrp
    enable
  exit
  rule 3
    action permit
    match protocol ah
    enable
  exit
exit
security zone-pair WAN self
  rule 1
    action permit
    match protocol vrrp
    enable
  exit
exit
security zone-pair LAN self
  rule 1
    action permit
    match protocol vrrp
    enable
  exit
exit