...
- Improved Reliability and Resiliency: Anycast provides improved reliability, because DNS queries are sent to an Anycast IP address. If the nearest server somehow goes offline, the router forwards the request to the next nearest DNS server advertising the target Anycast IP address.
- OSPF and BGP Protocols: Anycast uses both Open Shortest Path First (OSPF) and Border Gateway Protocol (BGP).
- Load Distribution: Anycast distributes the load across multiple DNS servers based on network topology. Dynamic routing enables a fully flexible and path-optimized DNS packet flow.
BloxOne Cloud Infoblox Platform provides multiple Anycast addresses to improve resiliency and reliability. Infoblox recommends that you provision your network firewalls and allow traffic to the following ports:
...
You can configure anycast addressing on the DNS servers and select BGP as the protocol to advertise the anycast addresses to Router 1 and 2 in AS 65499. For more information, see see Configuring Anycast Addresses. Once Once you have configured the DNS servers, the appliances automatically add filters on the advertising interfaces to limit the advertisements to the configured anycast IP addresses. Similarly, BGP filters are applied to ensure that the DNS servers only receive default route advertisements from the neighboring routers.
...