ViPR 2.1 - Avoid conflicts in EMC ViPR network virtual IP addresses
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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)