System News
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Archived Networking Articles
14 Aug 2014
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VXLAN in Solaris 11.2 [37792]
By Venugopal Iyer

Venu writes, "VXLAN, or Virtual eXtensible LAN, is essentially a tunneling mechanism used to provide isolated virtual Layer 2 (L2) segments that can span multiple physical L2 segments. Since it is a tunneling mechanism it uses IP (IPv4 or IPv6) as its underlying network which means we can have isolated virtual L2 segments over networks connected by IP. This allows Virtual Machines (VM) to be in the same L2 segment even if they are located on systems that are in different physical networks. Some of the benefits of VXLAN include:

  • Better use of resources, i.e. VMs can be provisioned on systems, that span different geographies, based on system load.
  • VMs can be moved across systems without having to reconfigure the underlying physical network.
  • Fewer MAC address collision issues, i.e. MAC address may collide as long as they are in different VXLAN segments.

Isolated L2 segments can be supported by existing mechanisms such as VLANs, but VLANs don't scale; the number of VLANs are limited to 4094 (0 and 1 are reserved), but VXLAN can provide upto 16 million isolated L2 networks..."
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15 Jul 2014
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July 2014 Critical Patch Update Released [37406]
By Eric P. Maurice

Eric writes, "Oracle today released the July 2014 Critical Patch Update. This Critical Patch Update provides 113 new security fixes across a wide range of product families including: Oracle Database, Oracle Fusion Middleware, Oracle Hyperion, Oracle Enterprise Manager Grid Control, Oracle E-Business Suite, Oracle PeopleSoft Enterprise, Oracle Siebel CRM, Oracle Industry Applications, Oracle Java SE, Oracle Linux and Virtualization, Oracle MySQL, and Oracle and Sun Systems Products Suite..."
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11 Jul 2014
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What Can You Do With Data Link Multipathing (DLMP)? [37300]
By Rick Ramsey

Rick writes, "Bjoern Rost, Oracle ACE, provides a nice explanation of a Solaris feature that didn't get a lot of attention when it was released: Data Link Multipathing (DLMP) and DLMP aggregation. DLMP aggregation allows you to combine virtual network interfaces from different physical network interfaces into high availability clusters. You can also use these clusters to improve load balancing, as Bjoern explains in his blog post.

Orgad likes DLMP, too. So much, in fact, that he took a break from reconfiguring the International Space Station so his kids could control it from their XBox, and wrote an article explaining how to apply DLMP to a virtual network. Two articles, in fact..."
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08 Jul 2014
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Network Virtualization High Availability [37299]
By Orgad Kimchi

"How to add high availability to the network infrastructure of a multitenant cloud environment using the DLMP aggregation technology introduced in Oracle Solaris 11.1."

Orgad writes, "This article is Part 1 of a two-part series. In Part 1, we will cover how to implement network HA using datalink multipathing (DLMP) aggregation technology, which was introduced in Oracle Solaris 11.1.

In Part 2 of this series, we will explore how to secure the network and perform typical network management operations for an environment that uses DLMP aggregations.

Once we virtualize a network cloud infrastructure using Oracle Solaris 11 network virtualization technologies - such as virtual network interface cards (VNICs), virtual switches, load balancers, firewalls, and routers - the network itself becomes an increasingly critical component of the cloud infrastructure..."
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20 Jun 2014
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More on OpenStack Networking by Ronen Kofman [36982]
By Chris Kawalek

Chris writes," Our spotlight this week is on the latest entry in a series by Ronen Kofman about OpenStack networking:

Diving into OpenStack Network Architecture - Part 3 - Routing

The previous entries in that series are really great reads, too:

Diving into OpenStack Network Architecture - Part 1 Diving into OpenStack Network Architecture - Part 2 - Basic Use Cases
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05 Jun 2014
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Oracle Joins OpenDaylight Project [36747]
Plans to Integrate OpenDaylight SDN Capabilities into Oracle Solaris

Oracle is expanding its application-driven software defined networking (SDN) capabilities in Oracle Solaris 11.2 with plans to integrate OpenDaylight SDN. The integration is intended to allow customers to improve service quality and take advantage of apps-to-disk SLAs through compatibility with a wide range of SDN devices, applications and services. It will also allow them to use a common and open SDN platform with OpenStack to manage Oracle Solaris-based clouds...
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