Cisco Blogs


Cisco Blog > Enterprise Networks

International Security Demands 100% Network Uptime

Nuclear security is a high priority international threat today. The Nuclear Security Summit (NSS) 2014 took place in The Hague, the Netherlands, following the summits in Washington D.C (2010) and Seoul (2012).

NSS 2014

Network Requirements:

An event of this magnitude required nothing but the best network solution. The venue had existing small networks across 5 buildings and 4 tents. They decided to disable the existing networks and setup a comprehensive Cisco network solution exclusively for this event. The major requirements were: Read More »

Tags: , , , , , , , ,

ITD: Intelligent Traffic Director

Data traffic has grown dramatically in the recent years, leading to increased deployment of network service appliances and servers in enterprise, data center, and cloud environments. To address the corresponding business needs, network switch and router architecture has evolved to support multi-terabit capacity. However, service appliance and server capacity remained limited to a few gigabits, far below switch capacity.

ITD (Intelligent Traffic Director) is a hardware based multi-Tbps Layer 4 load-balancing, traffic steering and clustering solution on Nexus 7xxx series of switches. It supports IP-stickiness, resiliency, NAT (EFT), VIP, health monitoring, sophisticated failure handling policies, N+M redundancy, IPv4, IPv6, VRF, weighted load-balancing, bi-directional flow-coherency, and IPSLA probes including DNS. There is no service module or external appliance needed. ITD provides order of magnitude CAPEX and OPEX savings for the customers. ITD is available on Nexus 7000/7700 series in NX-OS 6.2(8) or later. It is available for demo on Nexus 5k/6k. ITD is much superior than legacy solutions like PBR, WCCP, ECMP, port-channel, layer-4 load-balancer appliances.

Example use-cases: Read More »

Tags: , , , , , , , , , , , , , , ,

Scaling the Internet with 6500 Switches Ternary Content Addressable Memory(TCAM) Customization

The Internet routing table size has continued to grow steadily. In 2008 we reached 256K routes and now the table has exceed 512K Routes. This is of significance for customers running some of the older PFC3 based Supervisor 720 engines on the 6500 and 7600 switches.

On the Catalyst 6500 and 7600 Series platforms, all of the routing information is stored in special high-speed memory called TCAM. Read More »

Tags: , , ,

A Different Kind of Crash Test for the Catalyst 4500E

Cat4K Vs TruckNetworking environments can be harsh. Outdoor environments are often harsher!

Do not try this at home. When testing your Cisco switches for high availability capabilities, we recommend not setting them on fire, crashing into, or flooding them with water. However, we do have some experience with these situations and our switches keep running.

The network must operate 24 hours a day. With many devices and applications running on the network, oftentimes a few seconds of downtime can mean tens of thousands of dollars in financial loss. And yet, none of these usual measures for uptime take into account an actual physical disaster. Indeed, seldom do people think about what could happen to their switches in the physical environment that they are being deployed. Read More »

Tags: , , ,

Converged Access Enables “Perfect Branch” at CSC and ENVEN

Raj CSCCorporation Service Company (CSC) and ENVEN are deploying Converged Access with Catalyst 3850 switches in their branch offices to build single platforms for their wired and wireless networks. The in-built wireless controller in Catalyst 3850 eliminates the need for an external WLAN controller and brings wired features like Secure Group Tags, Flexible Netflow and Wireshark to the wireless networks.

Converged Access is a WLAN deployment mode that helps deliver common intelligent services across wired and wireless networks for security and policy, application visibility, network resiliency, smart operations and more. Catalyst 3850, Catalyst 3650, Catalyst 4500E switches, and Cisco 5760 WLAN Controllers (WLC) are capable of supporting Converged Access mode. Read More »

Tags: , , ,