Hi, I am having only a forward only option in bind configuration. When i dig on some host which has CNAME, the cache contains a longer TTL for the CNAME than the TTL for the final resolution of the IP.
However, in the example below, the CNAME is queried again when the TTL for a336.g.akamai.net. is up. I was expecting that the TTL for CNAME will be used from the cache and the lookup will not happen again until the TTL has not expired. Is there a way to avoid additional lookups when the value is already present in the cache for CNAME entries. root@titan# dig emp.bbci.co.uk ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-14.mlos2.mwg <<>> emp.bbci.co.uk ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27673 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;emp.bbci.co.uk. IN A ;; ANSWER SECTION: emp.bbci.co.uk. 436 IN CNAME emp-live.bbc.net.uk. emp-live.bbc.net.uk. 253 IN CNAME emp.bbci.co.uk.edgesuite.net. emp.bbci.co.uk.edgesuite.net. 3368 IN CNAME a336.g.akamai.net. a336.g.akamai.net. 6 IN A 58.27.124.225 a336.g.akamai.net. 6 IN A 58.27.124.200
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