Thursday, October 4, 2018

Apple-sourced mDNS traffic spike this month

Hi everyone,

First time poster to this subreddit. I'm a manager within the Client Services department of an undisclosed networking company :)

We've noticed in the last 30 days a significant increase in the number of our customers complaining about excessive mDNS/bonjour traffic from Apple-heavy networks. This has tons of side effects, including but not limited to performance reduction and CPU contention on edge devices.

We've not yet had any luck identifying whether it relates to a change in OSX or iOS, but both were updated last month and are suspect. We can't seem to find any explanation for the perceived increase in traffic, but using mitigation options for our customers to simply throttle the traffic.

Has anyone else who manages a corporate network noticed an increase in mDNS or general multicast traffic volume from Apple clients in the last month? Am I missing something obvious here?



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