[dnsdist] max packet size settings?

Brooks Bridges bbridges at o1.com
Fri Nov 18 21:21:42 UTC 2016

I am currently trying to utilize dnsdist as a load balancer in front of multiple pdns servers with a custom backend module that we are using for lcr purposes.  I am running into issues where if the response packet from the pdns server is above a certain size, dnsdist appears to just drop all data, and responds with an empty reply to the requesting side.

We are using a max packet size of 1400 on the requesting client side and that seems to work just fine when we query against the pdns server directly, however once I wedge dnsdist in the middle, it all goes to crap as soon as we hit about 600-750 bytes.

Brooks Bridges | Sr. Voice Services Engineer
O1 Communications
4359 Town Center Boulevard, Suite 217
El Dorado Hills, California 95762
office: 916.235.2097 | main: 888.444.1111, Option 2
email: bbridges at o1.com<mailto:bbridges at o1.com> | web: www.o1.com<http://www.o1.com/>

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