Sun Ethernet Fabric Operating System VRRP Administration Guide

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Updated: July 2015
 
 

Configure VRRP (Linux Example)

See the second figure in VRRP Topology for the topology in this example. Hosts are used to verify that the data is forwarded correctly. In this example, you use a Linux machine as a host. Port 1 of switch 1, port 1 of switch 2, and the host 1 are connected through a hub. Similarly, port 2 of switch 1, port 2 of switch 2, and host 2 are connected through another hub. In this topology, switch 1 and switch 2 act as a virtual router in vlan 2 and vlan 3. The virtual IP is 12.0.0.3 for vlan 2 and the IP is 20.0.0.3 for vlan 3. The priority of switch 1 is 150 and the priority of switch 2 is 125. Initially, switch 1 will forward the data traffic between host 1 and host 2. If switch 1 fails to operate for some reason, switch 2 will start forwarding the packets.

Note - Note that in the output of the show commands, the sections concerning the default VLAN (vlan 1) and the ports that are members of that VLAN are omitted.
  1. In switch 1, configure vlan 2 and vlan 3 and assign the member ports and IP addresses. Be sure to disable spanning tree and GVRP, if they are running in the switch.
    SEFOS# configure terminal
SEFOS(config)# no spanning-tree
SEFOS(config)# set gvrp disable
SEFOS(config)# vlan 2
SEFOS(config-vlan)# ports extreme-ethernet 0/1 untagged extreme-ethernet 0/1
SEFOS(config-vlan)# exit
SEFOS(config)# interface vlan2
SEFOS(config-if)# shutdown
SEFOS(config-if)# ip address 12.0.0.1 255.0.0.0
SEFOS(config)# no shutdown
SEFOS(config-if)# exit
SEFOS(config-if)# vlan 3
SEFOS(config-if)# ports extreme-ethernet 0/33 untagged extreme-ethernet 0/33
SEFOS(config-if)# interface extreme-ethernet 0/33
SEFOS(config)# switchport access vlan 3
SEFOS(config-vlan)# no shutdown
SEFOS(config-vlan)# exit
SEFOS(config)# interface vlan 3
SEFOS(config-if)# shutdown
SEFOS(config-if)# ip address 20.0.0.1 255.0.0.0
SEFOS(config-if)# no shutdown
SEFOS(config)# end
  2. Verify the VLAN configurations.
    SEFOS# show ip interface
vlan2 is up, line protocol is up
Internet Address is 12.0.0.1/8
SEFOS# show vlan brief
Broadcast Address  12.255.255.255Vlan database-------------Vlan ID             : 2Member Ports        : Ex0/1Untagged Ports      : Ex0/1Forbidden Ports     : NoneName                :Status              : Permanent----------------------------------Vlan ID             : 3Member Ports        : Ex0/33Untagged Ports      : Ex0/33Forbidden Ports     : NoneName                :Status              : Permanent----------------------------------
 
vlan3 is up, line protocol is up
Internet Address is 20.0.0.1/8
Broadcast Address  20.255.255.255
  3. In switch 2, configure vlan 2 and vlan 3 and assign the ports and IP address. Be sure to disable spanning tree and GVRP if they are running in the switch.
    SEFOS# configure terminal
SEFOS(config)# no spanning-tree
SEFOS(config)# set gvrp disable
SEFOS(config)# vlan 2
SEFOS(config-vlan)# ports extreme-ethernet 0/33 untagged extreme-ethernet 0/33
SEFOS(config-vlan)# exit
SEFOS(config)# interface extreme-ethernet 0/33
SEFOS(config-if)# switchport access vlan 2
SEFOS(config-if)# no shutdown
SEFOS(config-if)# exit
SEFOS(config)# interface vlan 2
SEFOS(config-if)# shutdown
SEFOS(config-if)# ip address 12.0.0.2 255.0.0.0
SEFOS(config-if)# no shutdown
SEFOS(config-if)# exit
SEFOS(config)# vlan 3
SEFOS(config-vlan)# ports extreme-ethernet 0/1 untagged extreme-ethernet 0/1
SEFOS(config-vlan)# exit
SEFOS(config)# interface extreme-ethernet 0/1
SEFOS(config-if)# switchport access vlan 3
SEFOS(config-if)# no shutdown
SEFOS(config-if)# exit
SEFOS(config)# interface vlan 3
SEFOS(config-if)# shutdown
SEFOS(config-if)# ip address 20.0.0.2 255.0.0.0
SEFOS(config-if)# no shutdown
SEFOS(config-if)# end
  4. Verify the configuration.
    SEFOS# show ip interface
vlan2 is up, line protocol is up
Internet Address is 12.0.0.2/8
SEFOS# show vlan briefBroadcast Address  12.255.255.255Vlan database-------------Vlan ID             : 2Member Ports        : Ex0/33Untagged Ports      : Ex0/33Forbidden Ports     : NoneName                :Status              : Permanent----------------------------------Vlan ID             : 3Member Ports        : Ex0/1Untagged Ports      : Ex0/1Forbidden Ports     : NoneName                :Status              : Permanent----------------------------------
 
vlan3 is up, line protocol is up
Internet Address is 20.0.0.2/8
Broadcast Address  20.255.255.255
  5. In switch 1, verify the connectivity between switch 1 and switch 2.
    SEFOS# ping 12.0.0.2
Reply Received From :12.0.0.2, TimeTaken : 50 msecs
Reply Received From :12.0.0.2, TimeTaken : 40 msecs
SEFOS# ping 20.0.0.2Reply Received From :12.0.0.2, TimeTaken : 40 msecsReply Received From :20.0.0.2, TimeTaken : 50 msecsReply Received From :20.0.0.2, TimeTaken : 30 msecsReply Received From :20.0.0.2, TimeTaken : 30 msecs
  6. Enable VRRP instances over vlan2 and vlan3 in switch 1 and configure the IP addresses and priority.
    SEFOS# configure terminal
SEFOS(config)# router vrrp
SEFOS(config-vrrp)# interface vlan 2
SEFOS(config-vrrp-if)# vrrp 1 ipv4 12.0.0.3
SEFOS(config-vrrp-if)# vrrp 1 priority 150
SEFOS(config-vrrp-if)# exit
SEFOS(config-vrrp)# interface vlan 3
SEFOS(config-vrrp-if)# vrrp 1 ip 20.0.0.3
SEFOS(config-vrrp-if)# vrrp 1 priority 150
SEFOS(config-vrrp-if)# end
  7. Verify the VRRP configurations in switch 1.
    SEFOS# show  vrrp
P indicates configured to preempt
Interface   vrID Priority  P  State    Master Addr     VRouter Addr
---------   ---- --------  -  -----    -----------     ------------
vlan2       1    150       P  Master   local           12.0.0.3
vlan3       1    150       P  Master   local           20.0.0.3
  8. Enable VRRP instances over vlan 2 and vlan 3 in switch 2, and configure the IP addresses and priority.
    SEFOS# configure terminal
SEFOS(config)# router vrrp
SEFOS(config-vrrp)# interface vlan 2
SEFOS(config-vrrp-if)# vrrp 1 ipv4 12.0.0.3
SEFOS(config-vrrp-if)# vrrp 1 priority 125
SEFOS(config-vrrp-if)# exit
SEFOS(config-vrrp)# interface vlan 3
SEFOS(config-vrrp-if)# vrrp 1 ipv4 20.0.0.3
SEFOS(config-vrrp-if)# vrrp 1 priority 125
SEFOS(config-vrrp-if)# end
  9. Verify the VRRP configurations in switch 2.
    SEFOS# show  vrrp
P indicates configured to preempt
Interface   vrID Priority  P  State    Master Addr     VRouter Addr
---------   ---- --------  -  -----    -----------     ------------
vlan2       1    125       P  Backup   12.0.0.3        12.0.0.3
vlan3       1    125       P  Backup   20.0.0.3        20.0.0.3
  10. In host 1, configure an interface with 12.0.0.100 and add a route to the host 2 network through 12.0.0.3.
    1. Execute these Linux commands in host 1 (a Linux machine is used as a host).
      [root@host1 root]# /sbin/ifconfig eth0 12.0.0.100
[root@host1 root]# /sbin/route add -net 20.0.0.0 netmask 255.0.0.0 gw 12.0.0.3
    2. Verify the configurations using these Linux commands.
      [root@host1 root]# /sbin/ifconfig
eth0      Link encap:Ethernet  HWaddr 00:10:B5:66:A7:28
 inet addr:12.0.0.100  Bcast:12.255.255.255  Mask:255.0.0.0
[root@host1 root]# /sbin/route -nUP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1Kernel IP routing tableDestination  Gateway    Genmask        Flags Metric Ref    Use Iface12.0.0.0     0.0.0.0    255.0.0.0      U     0      0      0   eth020.0.0.0     12.0.0.3   255.0.0.0      UG    0      0      0   eth0
RX packets:35 errors:0 dropped:0 overruns:0 frame:0
TX packets:80 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:2974 (2.9 Kb)  TX bytes:6092 (5.9 Kb)
Interrupt:15 Base address:0xbd00
 
  11. In host 2, configure an interface with 20.0.0.100 and add a route to the host 1 network through 20.0.0.3.
    1. Execute these Linux commands in host 2 (another Linux machine).
      [root@host2 root]# /sbin/ifconfig eth0 20.0.0.100
[root@host2 root]# /sbin/route add -net 12.0.0.0 netmask 255.0.0.0 gw 20.0.0.3
    2. Verify the configurations using these Linux commands.
      [root@host2 root]# /sbin/ifconfig
eth0      Link encap:Ethernet  HWaddr 00:10:B5:66:A7:28
 inet addr:20.0.0.100  Bcast:20.255.255.255  Mask:255.0.0.0
[root@host2 root]# /sbin/route -nUP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1Kernel IP routing tableDestination  Gateway     Genmask     Flags Metric Ref    Use Iface20.0.0.0    0.0.0.0    255.0.0.0      U     0     0        0     eth012.0.0.0   20.0.0.3    255.0.0.0     UG     0     0        0     eth0
RX packets:35 errors:0 dropped:0 overruns:0 frame:0
TX packets:80 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:2974 (2.9 Kb)  TX bytes:6092 (5.9 Kb)
Interrupt:15 Base address:0xbd00
 
  12. Initiate 25 ping packets from host 1 to host 2.
    [root@host2 root]# ping 20.0.0.100 -c 25
PING 20.0.0.100 (20.0.0.100) from 12.0.0.100 : 56(84) bytes of data.
64 bytes from 20.0.0.100: icmp_seq=1 ttl=63 time=79.0 ms
64 bytes from 20.0.0.100: icmp_seq=2 ttl=63 time=25.4 ms
64 bytes from 20.0.0.100: icmp_seq=3 ttl=63 time=25.7 ms
  13. During the ping session, shutdown vlan 2 and vlan 3 in switch 1.
    SEFOS# configure terminal
SEFOS(config)# interface vlan 2
SEFOS(config-if)# shutdown
SEFOS(config-if )# exit
SEFOS(config)# interface vlan 3
SEFOS(config-if)# shutdown
SEFOS(config-if)# end
  14. Observe whether the ping is still successful after a small black hole period (connectivity loss between the hosts).
    64 bytes from 20.0.0.100: icmp_seq=4 ttl=63 time=27.6 ms
64 bytes from 20.0.0.100: icmp_seq=5 ttl=63 time=24.8 ms
64 bytes from 20.0.0.100: icmp_seq=13 ttl=63 time=49.7 ms
64 bytes from 20.0.0.100: icmp_seq=14 ttl=63 time=30.3 ms
64 bytes from 20.0.0.100: icmp_seq=15 ttl=63 time=24.3 ms
64 bytes from 20.0.0.100: icmp_seq=16 ttl=63 time=31.3 ms
64 bytes from 20.0.0.100: icmp_seq=17 ttl=63 time=25.9 ms
64 bytes from 20.0.0.100: icmp_seq=18 ttl=63 time=30.3 ms
64 bytes from 20.0.0.100: icmp_seq=19 ttl=63 time=33.7 ms
64 bytes from 20.0.0.100: icmp_seq=20 ttl=63 time=28.8 ms
64 bytes from 20.0.0.100: icmp_seq=21 ttl=63 time=22.9 ms
64 bytes from 20.0.0.100: icmp_seq=22 ttl=63 time=25.3 ms
64 bytes from 20.0.0.100: icmp_seq=23 ttl=63 time=30.0 ms
64 bytes from 20.0.0.100: icmp_seq=24 ttl=63 time=22.3 ms
64 bytes from 20.0.0.100: icmp_seq=25 ttl=63 time=26.5 ms
 
--- 20.0.0.100 ping statistics ---
25 packets transmitted, 18 received, 28% loss, time 24045ms
rtt min/avg/max/mdev = 22.342/31.370/79.070/13.006 ms
  15. Verify that the ARP table in host 1 for 12.0.0.3 is resolved with the VRRP MAC address.
    [root@host1 root]# /sbin/arp -an
? (12.0.0.3) at 00:00:5E:00:01:01 [ether] on eth0
  16. Verify that the ARP table in host 2 for 20.0.0.3 is resolved with the VRRP MAC address.
    [root@host2 root]# /sbin/arp -an
? (20.0.0.3) at 00:00:5E:00:01:01 [ether] on eth0

    Alternatively, use the following steps to set up host 1 with a system running Solaris 10 and using an nxge 10GbE interface.

    1. Configure the interface with 12.0.0.100 as its IP address and add a route to the host 2 network through 12.0.0.3.
      root@unknown:~# ifconfig nxge0 plumb 12.0.0.100 up
root@unknown:~# route add net 20.0.0.0/8 12.0.0.3
    2. Verify the configuration.
      root@unknown:~# ifconfig nxge0
nxge0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 6
 inet 12.0.0.100 netmask ff000000 broadcast 12.255.255.255
root@unknown:~# netstat -rnether 0:14:4f:9b:de:b2 Routing Table: IPv4Destination           Gateway        Flags  Ref  Use    Interface -----------           --------       -----  ---  ---    --------- 12.0.0.0              12.0.0.100     U      5    16     nxge0     20.0.0.0              12.0.0.3       UG     2    1343           127.0.0.1             127.0.0.1      UH     2    3100   lo0
    3. Verify that the ARP entry for the gateway is the VRRP MAC address.
      root@unknown:~# arp -an
Net to Media Table: IPv4
Device   IP Address  Mask               Flags    Phys Addr
------   ----------  ----               -----    ---------
nxge0    12.0.0.1    255.255.255.255             00:21:28:77:c3:bd
nxge0    12.0.0.2    255.255.255.255             00:14:4f:6c:d0:4d
nxge0    12.0.0.3    255.255.255.255             00:00:5e:00:01:01
nxge0    12.0.0.100  255.255.255.255    SPLA     00:14:4f:9b:de:b2
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