site_archiver@lists.apple.com Delivered-To: macnetworkprog@lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mac.com; s=1a1hai; t=1736433665; bh=kdZ7kqdTmty8aifisLnBpv4PnZVqYysuhPyl/6ZC5lQ=; h=From:Content-Type:Mime-Version:Subject:Message-Id:Date:To: x-icloud-hme; b=vsie2RJ2hy3l71+gQP/SZJd0YzdMtOn5+UVTOCYCLv7l0Sq6h0tooP3nQF8661VVM 063tzb0RjY1PaTw9vqpVmBnecor0DCfzSz5/PDHnLj0t3RJrUjhExcpPJ8YTnpWvFd qby9Q8oMzKZWpjiE1nkgGttO9yOF/fC170VjnVPWJIMBMyYy6F9u8XoaklaiXeD4pu 3jjTIWXXXTPLuwiiPGofYNUF7rFl2gUUGhGZsgZ0VgNrPC4fSkO/90+kcbWwVGNPPF 4hKLsuaz1YQZ0uVQ9j6m0LLOj25sBjfX9T553R0uAlVP1otu2l3Jr5bvQw60oG75t9 oQfrgWfY/0qpw== Hi all, I'm struggling to identify the cause of a really strange issue that has started to plague our network of Mac devices. We use Cisco switches and have port security turned on which means any device that registers more than one MAC address triggers a port violation which then shuts down the port for a short period of time (5 mins I believe). A few months ago we suddenly started get lots of violations from Mac devices the were all registering additional MAC addresses (2 usually) that all had the same 6 character prefix (00:00:40). So far we've not been able to determine the cause and now getting pretty desperate and exploring all possible avenues. All we know is that prefix is registered to a company called Applicon from back in the day but is now shut down. Has anyone come across this issue or know of any possible reason why this may be happening? Thanks Jonathan _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists... This email sent to site_archiver@lists.apple.com