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IANA recently assigned option code 0x0008 to the client-subnet option of the EDNS0 record. Previously, the value was undefined, but processed as 0x50fa by various vendors.
The BIG-IP software treats the newly assigned value, 0x0008, as malformed, and the query is dropped.
EDNS0 with new client-subnet option code.
None
Option code 0x0008 to the client-subnet of the EDNS0 record is now recognized, so the BIG-IP software now accepts both 0x50fa and 0x0008.
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