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Cisco has today issued a security advisory for Denial of Service vulnerability in NX-OS. With specially crafted IP packet it may be possible to trigger a Cisco Nexus 1000v, 5000 or 7000 switch to reboot. Nexus 2000, 3000, 4000 and UCS Fabric Interconnects are not affected by this bug. Cisco explains details of issue [...] We have been experiencing strange FCoE flow control issue with one ESX 4.1 host connected to a Cisco Nexus 5000 switch. There was no congestion but switch received high amount of pause frames from single CNA port. Of all incoming packets ratio of pause frames was close to 50%, this was enough for switch [...] |
      
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