Enterasys Networks this week is expected to release a new line of blades for its Matrix N-Series enterprise core switches; improved QoS, high-density Gigabit and 10G Ethernet are in the offering.

Slide show: Take a closer look at Enterasys' core switch modules

Enterasys says its Diamond-Series Distributed Forwarding Engines (DFE) let customers build LANs with specific levels of QoS - with traffic classifications for specific applications, such as VoIP or video. The options for security integration and 10G connectivity also could help users roll out advanced LAN features, such as network access control.

The four blades include:

* 7GR4270-12 -- a 12-port module with advanced QoS features, targeted at the LAN aggregation or backbone layers.

* 7GR4280-19 -- an 18-port module with an expansion slot for 10G Ethernet expansion ports, or an IPS/IDS or NAC modules.

* 7GR4202-30 -- a blade with 30 10/100/1000Mbps ports, targeted at high-density server connections in data centers.

* 7KR4290-02 -- a dual-port 10 Gigabit Ethernet module, for connecting LAN core switches, or for connecting aggregation or data center layers to core switches.

These new LAN core/data center line cards complement power-over-Ethernet and 802.1X security features in Enterasys' N-Series Gold DFEs (for LAN edge switching), and the high-density Gigabit and 10G features in the Platinum series (for distribution layer and server aggregation).

Matrix N-Series switches, outfitted with Diamond series DFEs, are being deployed in the LAN core and data center of the Toronto Star Newspapers, in Toronto. The newspaper company is upgrading four Enterasys SSR routers in its LAN core with two Matrix N-Series switches. Two more N-Series boxes are going on the company's data center to connect to various server farms, says Rockie Lam, technical consultant at the Toronto Star.

"We were seeing traffic peaks pushing the bandwidth limitations [of the SSRs], so we decided it was time to bring in 10G Ethernet," Lam says.

The QoS functions in the Diamond-Series blades -- on the 12-port 7GR4270-12 module in particular -- support as many as 16 classes of traffic on a single port. Lam says he will use this capability to carve out tunnels of dedicated LAN bandwidth for specific applications, such as VoIP, large image file traffic associated with newspaper production and IP video.