Serious Cisco Nexus security vulnerability disclosed

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 [...]

vSphere ESXi 5.0 Driver Rollup 2 released

VMware has released ESXi 5.0 Driver Rollup version 2 which is a ESXi 5.0 installer with additional device drivers for products which are not supported in official ESXi 5.0 install image. vSphere ESXi 5.0 Driver Rollup install image is supported only for fresh installs, migrations from ESX 4.x or upgrades from ESXi 4.x are [...]

FCoE flow control issue with Cisco Nexus 5000

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 [...]