Avoid conflicts in EMC ViPR network virtual IP addresses
This article applies to EMC ViPR 2.0.
When more than one ViPR instance exists in the same subnet, use care when allocating the ViPR virtual IP addresses, to prevent a conflict in the load balancer's virtual router ID. The virtual router ID is calculated using the virtual IP address configuration with the following algorithm:
- IPv4 only or dual stack: virtual router ID is the last octet of the IPv4 address.
- IPv6 only: virtual router ID is the decimal equivalent of the last two hex digits in the IPv6 address.
For example, the following addresses in the same subnet would be invalid:
- 172.16.33.98 and 172.16.34.98 (because the last octets are the same, both 98)
- 172.16.33.98 and 2001:db8:170:2842::2462 (because 98 decimal equals 62 hex)