LTM delay with AAAA record request over IPv4?
I have an LTM running 11.5.3 that seems to be causing a delay when a RedHat6 server makes a combined AAAA/A request over IPv4 (only) to a DNS server pool being load-balanced by the LTM. There's a FastL4 udp profile in place (no DNS profile). This is not a problem with an old ACE30 load-balancer; only with the LTM. Anyone have any suggestions about how to deal with this? Documentation refers quite a bit to IPv6-to-IPv4 traffic manipulation but nothing that I could find concerning a combined A/AAAA request over IPv4. Apparently the AAAA request always goes first and sometimes a AAAA record can be returned and sometimes it's an A record (simply based on what's available for that lookup). Not sure if the v6-to-v4 settings apply in this situation since there's no actual v6 traffic.