HP 6125G HP 6125G & 6125G/XG Blade Switches High Availability Configur - Page 133
Configuration prerequisites, Configuring router priority, preemptive mode and tracking function
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• When a router is the IP address owner in a VRRP group, HP recommends you not to use the IP address of the interface (virtual IP address of the VRRP group) to establish a neighbor relationship with the adjacent router, that is, not to use the network command to enable OSPF on the interface. For more information about network command, see Layer 3-IP Routing Command Reference. • When VRRP is operating in load balancing mode, the virtual IP address of a VRRP group cannot be the same as the IP address of any interface in the VRRP group. In other words, in load balancing mode, the VRRP group does not have an IP address owner. • A VRRP group is removed after you remove all the virtual IP addresses configured for it. In addition, configurations on that VRRP group do not take effect any longer. • Removal of the VRRP group on the IP address owner causes IP address collision. To solve the collision, modify the IP address of the interface on the IP address owner first and then remove the VRRP group from the interface. • The virtual IP address of a VRRP group cannot be 0.0.0.0, 255.255.255.255, loopback addresses, non class A/B/C addresses or other illegal IP addresses such as 0.0.0.1. • A VRRP group operates properly only when the configured virtual IP address and the interface IP address belong to the same segment and are legal host addresses. If the configured virtual IP address and the interface IP address do not belong to the same network segment, or the configured IP address is the network address or network broadcast address of the network segment to which the interface IP address belongs, the state of the VRRP group is always initialize though you can perform the configuration successfully. In this case, VRRP does not take effect. Configuration prerequisites Before creating a VRRP group and configuring a virtual IP address on an interface, configure an IP address for the interface and make sure that it is in the same network segment as the virtual IP address to be configured. Configuration procedure To create a VRRP group and configure a virtual IP address: Step 1. Enter system view. 2. Enter the specified interface view. 3. Create a VRRP group and configure a virtual IP address for the VRRP group. Command system-view interface interface-type interface-number vrrp vrid virtual-router-id virtual-ip virtual-address Remarks N/A N/A VRRP group is not created by default. Configuring router priority, preemptive mode and tracking function Configuration guidelines • The running priority of an IP address owner is always 255 and you do not need to configure it. An IP address owner always operates in preemptive mode. • If you configure an interface to be tracked or a track entry to be monitored on a router that is the IP address owner in a VRRP group, the configuration does not take effect. If the router is not the IP address owner in the VRRP group later, the configuration takes effect. 126