mdnsresponder excessive network traffic

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Level 1

10 points

mdnsresponder excessive network traffic

Lately I've been seeing a lot of network traffic from mdnsresponder and my system has been sluggish. With nothing else active on the system, it is currently send about 1 pkt/s of around 100 bytes receiving 400-500 pkts/s of 45K bytes/s. Saw this on 10.10.4 and upgraded to 10.10.5 where it is still happening. Activity monitor shows it sent 492 packets with 50Kb and received 1,532,560 packets with 152.4Mb since I last rebooted. Seems a bit excessive from my perspective. Thoughts?

Macmini, 16Gb, 1Tb Fusion, 10.10.5

Mac mini (Late 2012), OS X Yosemite (10.10.5)

Posted on Aug 20, 2015 8:51 PM

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Answer 1

dvmtthws Author

Level 1

10 points

Aug 21, 2015 3:54 PM in response to lllaass

The keychain approach did not solve the problem.

I know a bit about networking so I analyzed the packet stream and found a series if in-addr.arpa requests for MP640R.local which is a USB printer attached to my Mac that also has wireless capabilities. On my system it is only configured for USB. I disabled printer sharing, pulled the USB cable and restarted the printer. The traffic ceased immediately when I pulled the cable. When I plugged it back in the problem was gone.

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Answer 2

lllaass

Level 10

210,519 points

Aug 21, 2015 1:25 AM in response to dvmtthws

Try:

mdnsresponder causes traffic

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