Tag Archive for Broadcom

Gen8 Microserver features dual Broadcom Network ports, teamable!

HP_Microserver_G8_Network

Here’s the image that many people have been wanting to see.

Straight out of HP’s system diagram for the Microserver G8, we can see that it will feature the Broadcom BCM5717 chip, which is a part of the BCM5718 family. It sports two Gigabit Ethernet (GigE) RJ45 ports with the following new features over the preceding model:

  • Teaming (via Broadcom driver under Windows)
  • Jumbo Frame support
  • IP Checksum offload
  • TCP Checksum offload
  • UDP Checksum offload

Unfortunately the checksum offloads will be of limited use to such a low-powered server, and having these enabled may have an impact on network performance at high CPU utilisation. This particular chip also does not support the extra Virtualisation features like VMware NetQueue for vSphere, or Microsoft Virtual Machine Queue (VMQ) but that probably is not required for something like a Microserver.

Compared to the single network port of the G7 Microserver, the new model gains quite a bit of functionality. The BCM5723-provided networking in the G7 did not support Jumbo frames, and also did not play nicely with FreeNAS, with quite a few users complaining of slow network speeds. Generally, the fix was to install a low-profile Intel PRO based network card in the PCIe x1 slot and use that instead.

Teaming is nice, and will be appreciated out of the box, however most serious ESXi users with G7’s installed a low-profile HP NC360T dual-port Gigabit Ethernet NIC which uses the Intel PRO chipset. This was available via many Server OEMS including Dell and Sun, and can be found on eBay in various guises for about $USD75-USD$80. All work the same.

Having two built-in NIC’s may also mean that the Microserver might become a viable platform for routing/firewalling 4+ GigE interfaces under a Linux solution like Vyatta or pfSense. The option of a NC360T/Intel-based Dual-Port NIC gives a cheap and easy 4-port solution.

Granted that even the Intel Dual-core CPU’s might not be up to the task of Routing and firewalling six GigE ports, if the user so desires to source one, a quad-port Gigabit NIC like the HP NC364T could be added to the x16 PCIe slot and give a total of six copper GigE interfaces.

Even with the advent of cheap hardware Router/Firewalls such as the 3-port Ubiquiti EdgeMax Lite priced around $100, it still may mean that some users may elect to use the Microserver as a home Router/Firewall.

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