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+====== Simple VRRP lab  ======
+===== Network Diagram =====
+{{:documentation:examples:bsdrp-simple-vrrp-lab.png|}}
+===== Starting the lab =====
+More information on these BSDRP lab scripts available on [[documentation:examples:How to build a BSDRP router lab]].
+Example with the bhyve lab script:
+<code>
+# ./BSDRP-lab-bhyve.sh -i /usr/obj/BSDRP.amd64/BSDRP-1.61-full-amd64-vga.img -n 4 -l 2
+vmm module not loaded. Loading it...
+nmdm module not loaded. Loading it...
+if_tap module not loaded. Loading it...
+BSD Router Project (http://bsdrp.net) - bhyve full-meshed lab script
+Setting-up a virtual lab with 4 VM(s):
+- Working directory: /tmp/BSDRP
+- Each VM have 1 core(s) and 256M RAM
+- Switch mode: bridge + tap
+- 2 LAN(s) between all VM
+- Full mesh Ethernet links between each VM
+VM 1 have the following NIC:
+- vtnet0 connected to VM 2.
+- vtnet1 connected to VM 3.
+- vtnet2 connected to VM 4.
+- vtnet3 connected to LAN number 1
+- vtnet4 connected to LAN number 2
+VM 2 have the following NIC:
+- vtnet0 connected to VM 1.
+- vtnet1 connected to VM 3.
+- vtnet2 connected to VM 4.
+- vtnet3 connected to LAN number 1
+- vtnet4 connected to LAN number 2
+VM 3 have the following NIC:
+- vtnet0 connected to VM 1.
+- vtnet1 connected to VM 2.
+- vtnet2 connected to VM 4.
+- vtnet3 connected to LAN number 1
+- vtnet4 connected to LAN number 2
+VM 4 have the following NIC:
+- vtnet0 connected to VM 1.
+- vtnet1 connected to VM 2.
+- vtnet2 connected to VM 3.
+- vtnet3 connected to LAN number 1
+- vtnet4 connected to LAN number 2
+For connecting to VM'serial console, you can use:
+- VM 1 : cu -l /dev/nmdm1B
+- VM 2 : cu -l /dev/nmdm2B
+- VM 3 : cu -l /dev/nmdm3B
+- VM 4 : cu -l /dev/nmdm4B
+</code>
+===== Configuring Routers =====
+==== Router 1 (R1) ====
+<code>
+sysrc hostname=R1
+sysrc ifconfig_vtnet3="inet 192.168.1.1/24"
+sysrc ifconfig_vtnet4="inet 192.168.2.1/24"
+sysrc freevrrpd_enable=YES
+cat <<EOF > /usr/local/etc/freevrrpd.conf
+[VRID]
+serverid = 1
+interface = vtnet3
+# This router is the master
+priority = 101
+addr = 192.168.1.254/24
+# We want that this state is dependant with the state of vrid 2
+vridsdep = 2
+password = vrid1
+[VRID]
+serverid = 2
+interface = vtnet4
+# This router is the master
+priority = 101
+addr = 192.168.2.254/24
+password = vrid2
+# We want that this state is dependant with the state of vrid 1
+vridsdep = 1
+EOF
+service netif restart
+service freevrrpd start
+config save
+</code>
+==== Router 2 (R2) ====
+<code>
+sysrc hostname=R2
+sysrc ifconfig_vtnet3="inet 192.168.1.2/24"
+sysrc ifconfig_vtnet4="inet 192.168.2.2/24"
+sysrc freevrrpd_enable=YES
+cat <<EOF > /usr/local/etc/freevrrpd.conf
+[VRID]
+serverid = 1
+interface = vtnet3
+# This router is the backup
+priority = 100
+addr = 192.168.1.254/24
+# We want that this state is dependant with the state of vrid 2
+vridsdep = 2
+password = vrid1
+[VRID]
+serverid = 2
+interface = vtnet4
+# This router is the backup
+priority = 100
+addr = 192.168.2.254/24
+password = vrid2
+# We want that this state is dependant with the state of vrid 1
+vridsdep = 1
+EOF
+service netif restart
+service freevrrpd start
+config save
+</code>
+==== Router 3 (R3) ====
+<code>
+sysrc hostname=R3
+sysrc ifconfig_vtnet3="inet 192.168.1.3/24"
+sysrc defaultrouter="192.168.1.254"
+sysrc gateway_enable=NO
+sysrc ipv6_gateway_enable=NO
+service netif restart
+service routing restart
+config save
+</code>
+==== Router 4 (R4) ====
+<code>
+sysrc hostname=R4
+sysrc ifconfig_vtnet4="inet 192.168.2.4/24"
+sysrc defaultrouter="192.168.2.254"
+sysrc gateway_enable=NO
+sysrc ipv6_gateway_enable=NO
+service netif restart
+service routing restart
+config save
+</code>
+===== Checking configuration =====
+==== VRRP state ====
+On R1:
+<code>
+[root@R1]~# grep vrrp /var/log/messages
+Nov  5 11:37:15 R1 freevrrpd[1177]: launching daemon in background mode
+Nov  5 11:37:15 R1 freevrrpd[1178]: initializing threads and all VRID
+Nov  5 11:37:15 R1 freevrrpd[1178]: reading configuration file /usr/local/etc/freevrrpd.conf
+Nov  5 11:37:15 R1 freevrrpd[1178]: monitored circuits engine initialized
+Nov  5 11:37:16 R1 freevrrpd[1178]: server state vrid 1: backup
+Nov  5 11:37:17 R1 freevrrpd[1178]: server state vrid 2: backup
+Nov  5 11:37:20 R1 freevrrpd[1178]: server state vrid 1: master
+Nov  5 11:37:21 R1 freevrrpd[1178]: server state vrid 2: master
+</code>
+//R1 is VRRP master for vrid 1 and 2.//
+On R2:
+<code>
+[root@R2]~#  grep vrrp /var/log/messages
+Nov  5 11:41:37 R2 freevrrpd[2091]: launching daemon in background mode
+Nov  5 11:41:37 R2 freevrrpd[2092]: initializing threads and all VRID
+Nov  5 11:41:37 R2 freevrrpd[2092]: reading configuration file /usr/local/etc/freevrrpd.conf
+Nov  5 11:41:37 R2 freevrrpd[2092]: monitored circuits engine initialized
+Nov  5 11:41:38 R2 freevrrpd[2092]: server state vrid 1: backup
+Nov  5 11:41:39 R2 freevrrpd[2092]: server state vrid 2: backup
+</code>
+//R2 is the VRRP backup for vrid 1 and 2.//
+==== Forwarding and ARP entry ====
+Pinging R4 from R3:
+<code>
+[root@R3]~# ping 192.168.2.4
+PING 192.168.2.4 (192.168.2.4): 56 data bytes
+bytes from 192.168.2.4: icmp_seq=0 ttl=63 time=0.669 ms
+bytes from 192.168.2.4: icmp_seq=1 ttl=63 time=0.749 ms
+bytes from 192.168.2.4: icmp_seq=2 ttl=63 time=0.718 ms
+</code>
+And checking ARP cache for a VRRP MAC address (00:00:5e:00:01:xx)
+<code>
+[root@R3]~#arp -na | grep 192.168.1.254
+? (192.168.1.254) at 00:00:5e:00:01:01 on vtnet3 expires in 709 seconds [ethernet]
+</code>
+==== Testing VRRP swap ====
+Disable one interface on R1 for changing the VRRP states:
+<code>
+[root@R1]~# ifconfig vtnet3 down
+Nov  5 11:48:40 R1 freevrrpd[1178]: can't write to socket: Network is down
+Nov  5 11:48:40 R1 freevrrpd[1178]: There is a big problem here !
+Nov  5 11:48:42 R1 freevrrpd[1178]: interface vtnet3 is faulty, deactivated from VRRP VRIDs
+Nov  5 11:48:42 R1 freevrrpd[1178]: VRID 2 (interface vtnet4) has been deactivated due to dependance
+</code>
+And check that R2 became the master:
+<code>
+[root@R2]~#tail -f /var/log/messages
+Nov  5 11:48:45 R2 freevrrpd[2092]: server state vrid 1: master
+Nov  5 11:48:48 R2 freevrrpd[2092]: server state vrid 2: master
+</code>
+And check that R3 still can reach R4:
+<code>
+[root@R3]~#ping 192.168.2.4
+PING 192.168.2.4 (192.168.2.4): 56 data bytes
+bytes from 192.168.2.4: icmp_seq=0 ttl=63 time=0.571 ms
+bytes from 192.168.2.4: icmp_seq=1 ttl=63 time=0.795 ms
+</code>

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