Cisco Systems 1600R manual Supported Platforms, Restrictions, Related Features and Technologies

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OSPF Sham-Link Support for MPLS VPN

Supported Platforms

Restrictions

When OSPF is used as a protocol between PE and CE routers, the OSPF metric is preserved when routes are advertised over the VPN backbone. The metric is used on the remote PE routers to select the correct route. For this reason, you should not modify the metric value when OSPF is redistributed to BGP, and when BGP is redistributed to OSPF. If you modify the metric value, routing loops may occur.

Related Features and Technologies

•MPLS

•OSPF

•BGP

Related Documents

•Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.2

•Cisco IOS Configuration Fundamentals Command Reference, Release 12.2

•Cisco IOS IP Command Reference, Volume 2 of 3: Routing Protocols, Release 12.2 http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fiprrp_r/1rfospf.htm

•MPLS Virtual Private Networks http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120t/120t5/vpn.htm

•Configuring OSPF

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcprt2/1cfospf. htm

•Configuring BGP

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcprt2/1cfbgp.h tm

•RFC 1163, A Border Gateway Protocol

•RFC 1164, Application of the Border Gateway Protocol in the Internet

•RFC 2283, Multiprotocol Extensions for BGP-4

•RFC 2328, Open Shortest Path First, Version 2

•RFC 2547, BGP/MPLS VPNs

Supported Platforms

•Cisco 1400 series

•Cisco 1600

•Cisco 1600R

•Cisco 1710

•Cisco 1720

Cisco IOS Release 12.2(8)T

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Contents Feature History ReleaseModification Feature OverviewUsing Ospf in PE-CE Router Connections Using a Sham-Link to Correct Ospf Backdoor Routing PE-1#show ip bgp vpnv4 all From 0.0.0.0PE-1#show ip route vrf ospf Sham-Link Configuration Example Sham-Link Example Vpnv4 all tag beginClient Site Connection Across the Mpls VPN Backbone Flexible Routing in an Mpls VPN ConfigurationBenefits Related Features and Technologies Supported PlatformsRestrictions Related DocumentsDetermining Platform Support Through Cisco Feature Navigator Configuration Tasks Supported Standards, MIBs, and RFCsPrerequisites Creating a Sham-LinkCommand Purpose Verifying Sham-Link CreationConfiguration Examples Command ReferenceMonitoring and Maintaining a Sham-Link Show ip ospf sham-linksCommand Modes Command History Area sham-link costExamples 120Defaults Show ip ospf sham-linksUsage Guidelines Router1# show ip ospf sham-linksGlossary
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1600R, 1600, 1400 series specifications

Cisco Systems 1600 series routers are well-regarded in the networking industry for their reliability, versatility, and performance. Designed to meet the needs of small to medium-sized businesses, the Cisco 1600 series is primarily oriented towards providing robust connectivity for branch offices and remote sites.

One of the most significant features of the Cisco 1600 series is its modular architecture. This allows users to customize their routers with various interface cards, enabling support for different types of WAN technologies, including serial, ISDN, and Frame Relay. The modular design not only enhances flexibility but also extends the lifespan of the equipment, as businesses can upgrade their capacity and functionalities according to evolving demands.

Another key characteristic of the Cisco 1600 routers is their advanced routing capabilities. These devices support a wide range of routing protocols, including RIP, OSPF, EIGRP, and BGP. This versatility ensures seamless integration into existing network infrastructures, facilitating the scalability and adaptability that modern networks require.

Security is also a crucial aspect of the Cisco 1600 series. Incorporating features such as access control lists (ACLs) and support for Virtual Private Networks (VPNs), these routers help businesses safeguard their sensitive data during transmission. Enhanced security features allow companies to implement secure remote access for employees, thereby maintaining productivity without compromising safety.

In addition to routing and security, the Cisco 1600 series boasts Quality of Service (QoS) capabilities. This technology enables better management of network traffic, ensuring that critical applications receive the bandwidth they need for optimal performance. By prioritizing important data flows, businesses can enhance user experience and minimize disruptions across their network.

The Cisco 1600 series routers are also equipped with user-friendly interfaces and management tools. Cisco's IOS software platform provides a command-line interface (CLI) and web-based graphical interface for straightforward configuration and monitoring. This simplifies network management tasks and reduces the learning curve for IT personnel.

In summary, the Cisco Systems 1600 series routers offer a significant combination of modularity, robust routing protocols, enhanced security measures, Quality of Service features, and user-friendly management options. These characteristics make them an excellent choice for small to medium-sized enterprises looking to establish a reliable and secure networking infrastructure. With the continued evolution of networking technologies, the Cisco 1600 series stands as a dependable solution for businesses navigating an increasingly complex digital landscape.