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VRRP uses the 'update-cascade-interface' on link monitor instead of the 'update-static-route'.
When monitoring a server using the link monitor, instead of removing the route, bring down an interface where VRRP is configured when the link monitor status state goes from alive to die.
Bringing down the interface on which VRRP is configured causes a re-election of the Master VRRP.
Configuration.
show system link-monitor
config system link-monitor
edit "1"
set srcintf "port4"
set server "8.8.8.8"
set gateway-ip 192.168.44.1
set update-static-route disable
set update-cascade-interface enable
next
end
config system interface
edit "port4"
set vdom "root"
set ip 192.168.44.111 255.255.255.0
set fail-detect enable
set fail-detect-option detectserver
set fail-alert-method link-down
set fail-alert-interfaces "port3"
set type physical
set snmp-index 4
next
end
show system interface port3
config system interface
edit "port3"
set vdom "root"
set ip 192.168.33.111 255.255.255.0
set type physical
set vrrp-virtual-mac enable
config vrrp
edit 1
set vrip 192.168.33.1
set priority 200
set vrdst 8.8.8.8
set vrdst-priority 3
next
end
set snmp-index 3
next
end
Link monitor status shows that the state is ALIVE.
diagnose sys link-monitor status
Link Monitor: 1, Status: alive, Server num(1), Flags=0x1 init, Create time: Fri Jul 15 17:15:15 2022
Source interface: port4 (6)
Gateway: 192.168.44.1
Interval: 500 ms
Peer: 8.8.8.8(8.8.8.8)
Source IP(192.168.44.111)
Route: 192.168.44.111->8.8.8.8/32, gwy(192.168.44.1)
protocol: ping, state: alive
Latency(Min/Max/Avg): 17.180/34.532/20.473 ms
Jitter(Min/Max/Avg): 0.084/16.354/3.016
Packet lost: 41.000%
Number of out-of-sequence packets: 0
Fail Times(0/5)
Packet sent: 677, received: 59, Sequence(sent/rcvd/exp): 678/678/679
VRRP command showing that the device is elected as the Master.
get router info vrrp
Interface: port3, primary IP address: 192.168.33.111
UseVMAC: 1, SoftSW: 0, BrPortIdx: 0, PromiscCount: 1
HA mode: primary (0:0:1) VRRP master number: 1
VRID: 1 verion: 2
vrip: 192.168.33.1, priority: 200 (200,3), state: MASTER
adv_interval: 1, preempt: 1, ignore_dft: 0 start_time: 3
master_adv_interval: 100, accept: 1
vrmac: 00:00:5e:00:01:01
vrdst: 8.8.8.8
vrgrp: 0
Functioning Debug when the router is the VRRP Master.
diagnose debug reset
diagnose debug disable
diagnose debug application vrrpd -1
diagnose debug enable
Debug messages will be on for 30 minutes.
[vrrpd_loop:2288]: ret 0
[vrrp_vrt_adv_timer_func:1613]: port3, vrid 1, vrip 192.168.33.1, (11143->11143)
[vrrpd_loop:2288]: ret 0
[vrrp_vrt_adv_timer_func:1613]: port3, vrid 1, vrip 192.168.33.1, (11143->11143)
di[vrrpd_loop:2288]: ret 0
To stop the debug:
diagnose debug disable
diagnose debug reset
Sniffer showing that the device is sending out the VRRP packet on port3.
diagnose sniffer packet any "host 224.0.0.18" 4 3
Using Original Sniffing Mode
interfaces=[any]
filters=[host 224.0.0.18]
1.754734 port3 out 192.168.33.111 -> 224.0.0.18: ip-proto-112 20
2.756188 port3 out 192.168.33.111 -> 224.0.0.18: ip-proto-112 20
3.757798 port3 out 192.168.33.111 -> 224.0.0.18: ip-proto-112 20
A command showing the Status of the VRRP configured interface.
diagnose hardware deviceinfo nic port3 | grep State -A 1
State: up
Link: up
get router info routing-table details 8.8.8.8
Routing table for VRF=0
Routing entry for 0.0.0.0/0
Known via "bgp", distance 200, metric 0, best
Last update 00:03:05 ago
* 192.168.44.1, via port4 distance 0
When the link state fails.
Debug flow when the interface is brought down.
[vrrp_vrt_adv_timer_func:1613]: port3, vrid 1, vrip 192.168.33.1, (11143->11143)
[vrrpd_loop:2288]: ret 0
[vrrp_vrt_adv_timer_func:1613]: port3, vrid 1, vrip 192.168.33.1, (11143->1102)
[vrrp_vif_promisc_set:1277]: ret 0, 98
[vrrp_vrt_leave_master:1516]: port3, vrid 1, vrip 192.168.33.1, (200 1 1 100)
[vrrp_vrt_goto_backup:1595]: port3, vrid 1, vrip 192.168.33.1, (200 1 1 100)
[vrrpd_loop:2288]: ret 0
[vrrp_vrt_down_timer_func:1558]: port3, vrid 1, vrip 192.168.33.1, (1102->1102)
[vrrpd_loop:2288]: ret 0
diagnose sys link-monitor status
Link Monitor: 1, Status: die, Server num(1), Flags=0x9 init, Create time: Fri Jul 15 21:00:42 2022
Source interface: port4 (6)
Gateway: 192.168.44.1
Interval: 500 ms
Peer: 8.8.8.8(8.8.8.8)
Source IP(192.168.44.111)
Route: 192.168.44.111->8.8.8.8/32, gwy(192.168.44.1)
protocol: ping, state: die
Packet lost: 100.000%
Number of out-of-sequence packets: 0
Recovery times(0/5) Fail Times(4/5)
Packet sent: 1654, received: 654, Sequence(sent/rcvd/exp): 1655/755/756
diagnose sys link-monitor status | grep state
protocol: ping, state: die
diagnose hardware deviceinfo nic port3 | grep State -A 1
State: down
Link: down
get router info vrrp
Interface: port3, primary IP address: 192.168.33.111
UseVMAC: 1, SoftSW: 0, BrPortIdx: 0, PromiscCount: 0
HA mode: primary (0:0:1) VRRP master number: 0
VRID: 1 verion: 2
vrip: 192.168.33.1, priority: 200 (200,3), state: BACKUP
adv_interval: 1, preempt: 1, ignore_dft: 0 start_time: 3
master_adv_interval: 100, accept: 1
vrmac: 00:00:5e:00:01:01
vrdst: 8.8.8.8
vrgrp: 0
get router info vrrp | grep state
vrip: 192.168.33.1, priority: 200 (200,3), state: BACKUP
Note:
The VRRP checks the route to vrdst. As long as there is a route going to the Vrdst. The VRRP will not fail. The VRRP will failover only when the route going to vrdst disappears.
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