When designing a campus network, Cloud Connectiv will always help plan the optimal use of the highly redundant devices. Careful consideration should be given as to when and where to make an investment in redundancy to create a resilient and highly available network. With recent platforms such as the 6880-XL and Catalyst 6800s, Campus LANs have never been this exciting and robust.
Maximizing Business Potential
The hierarchical network model consists of two actively forwarding core nodes, with sufficient bandwidth and capacity to service the entire network in the event of a failure of one of the nodes. Campus LAN still follows the traditional hierarchy of access, aggregation/distribution, and core even in a collapsed model. This model also requires a redundant distribution pair supporting each distribution building block. Similarly to the core, the distribution layer is engineered with sufficient bandwidth and capacity so that the complete failure of one of the distribution nodes does not impact the performance of the network from a bandwidth or switching capacity perspective.
Campus network devices can currently provide a high level of availability within the individual nodes. The Cisco Catalyst 6800/6880 and 4500E switches can support redundant supervisor engines and provide L2 Stateful Switchover (SSO), which ensures that the standby supervisor engine is synchronized from an L2 perspective and can quickly assume L2 forwarding responsibilities in the event of a supervisor failure.
The Catalyst 6800/6880 also provides L3 Non-Stop Forwarding (NSF), which allows the redundant supervisor to assume L3 forwarding responsibilities without resetting or re-establishing neighbor relationships with the surrounding L3 peers in the event of the failure of the primary supervisor.
Connected Globally, Quickly, Securely
When designing a network for optimum high availability, it is tempting to add redundant supervisors to the redundant topology in an attempt to achieve even higher availability. However, adding redundant supervisors to redundant core and distribution layers of the network can increase the convergence time in the event of a supervisor failure.
The Cisco Catalyst 6880-X Series offers primary features and benefits, including:
- • Platform Scalability:The platform supports up to 220Gbps slot capacity per port-card. It supports up to 2Tbps of switching capacity, which doubles up to 4Tbps with VSS technology.
- • Security:Support for Cisco TrustSec (CTS), to provide IEEE 802.1AE MACsec encryption and role-based ACL, CoPP to prevent DoS attacks and Cisco ISE to safeguard and manage end-to-end security for the enterprise.
- • Virtualization:Comprehensive suite of Virtualization features including L2/L3 VPN, full MPLS, EVN, VRF aware applications for NAT Netflow, GRE for v4/v6, L2 extensions with VPLS etc. to segment different user groups and serve unique security/QoS policy requirements of each of these diverse user groups.
- • Application Visibility and Control (AVC):Supports enhanced application monitoring such as Flexible and Sampled NetFlow for intelligent and scalable application monitoring.
- • Smart Operations:The Cisco Catalyst 6880-X supports Catalyst Instant Access*, which allows an Instant Access Client to act as a remote line card of the Cisco Catalyst 6880-X, as well as Smart Install Director, which provides zero-touch deployment of access switches.
- • High Availability:Two Cisco Catalyst 6880-X Series Switches can be combined into a VSS. In addition to high-availability VSS, provides ease of operation by providing a single point of management, eliminating the need for First Hop Routing Protocol (FHRP) and removing the reliance on Spanning Tree Protocol (STP) for link failure restoration.
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