Service Manual

• VRRPv3 as dened in RFC 5798, Virtual Router Redundancy Protocol (VRRP) Version 3 for IPv4 and IPv6
You can also migrate a IPv4 group from VRRPv2 to VRRP3.
To congure the VRRP version for IPv4, use the version command in INTERFACE mode.
Example: Conguring VRRP to Use Version 3
The following example congures the IPv4 VRRP 100 group to use VRRP protocol version 3.
Dell(conf-if-te-1/1/1)# vrrp-group 100
Dell(conf-if-te-1/1/1-vrid-100)#version ?
2 VRRPv2
3 VRRPv3
both Interoperable, send VRRPv3 receive both
Dell(conf-if-te-1/1/1-vrid-100)#version 3
You can use the version both command in INTERFACE mode to migrate from VRRPv2 to VRRPv3. When you set the VRRP version
to both, the switch sends only VRRPv3 advertisements but can receive VRRPv2 or VRRPv3 packets.
To migrate an IPv4 VRRP group from VRRPv2 to VRRPv3:
1. Set the switches with the lowest priority to “both”.
2. Set the switch with the highest priority to version to 3.
3. Set all the switches from both to version 3.
NOTE: Do not run VRRP version 2 and version 3 in the same group for an extended period of time
Example: Migrating an IPv4 VRRP Group from VRRPv2 to VRRPv3
NOTE: Carefully following this procedure, otherwise you might introduce dual master switches issues.
To migrate an IPv4 VRRP Group from VRRPv2 to VRRPv3:
1. Set the backup switches to VRRP version to both.
Dell_backup_switch1(conf-if-te-1/1/1-vrid-100)#version both
Dell_backup_switch2(conf-if-te-1/2/1-vrid-100)#version both
2. Set the master switch to VRRP protocol version 3.
Dell_master_switch(conf-if-te-1/1/1-vrid-100)#version 3
3. Set the backup switches to version 3.
Dell_backup_switch1(conf-if-te-1/1/1-vrid-100)#version 3
Dell_backup_switch2(conf-if-te-1/2/1-vrid-100)#version 3
Assign Virtual IP addresses
Virtual routers contain virtual IP addresses congured for that VRRP group (VRID). A VRRP group does not transmit VRRP packets
until you assign the Virtual IP address to the VRRP group.
For more information, refer to VRRP Implementation.
To activate a VRRP group on an interface (so that VRRP group starts transmitting VRRP packets), congure at least one virtual IP
address in a VRRP group. The virtual IP address is the IP address of the virtual router and does not require the IP address mask.
You can congure up to 12 virtual IP addresses on a single VRRP group (VRID).
The following rules apply to virtual IP addresses:
• The virtual IP addresses must be in the same subnet as the primary or secondary IP addresses congured on the interface.
Though a single VRRP group can contain virtual IP addresses belonging to multiple IP subnets congured on the interface, Dell
Networking recommends conguring virtual IP addresses belonging to the same IP subnet for any one VRRP group.
Virtual Router Redundancy Protocol (VRRP)
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