Propagating LSPs on a Point-to-Point Interface

A point-to-point link does not need to ensure that multiple systems have synchronized databases. With only one other router with which to work, some reliance is given to the router's capability to determine the need to update so that bandwidth can be optimized. The following list describes the point...

The spf-interval Command

By default, the SPF algorithm runs at least every five seconds, under stable network conditions, even though network events such as adjacency changes could trigger immediate SPF runs. Running SPF on a very large LS database requires tremendous processor resources, so a high frequency of runs could b...

Comparison of the IS-IS Restart Mechanisms

The advantages of the IETF IS-IS restart approach include scalability (does not require IS-ISrelated state preservation across the restart) and standards-based implementation. Disadvantages of this approach are that it requires IS-IS protocol extensions and support from its neighbors (helper nodes)....

RFC 1973 and Cisco Implementation of PPP over Frame Relay

RFC 1661 defines the standard PPP specifications, whereas a separate RFC document, RFC 1973, describes a standard method for transporting PPP over a Frame Relay VC connection. Cisco's implementation of the PPP over Frame Relay feature is based on the RFC 1973 specifications. A Cisco router support...

Enabling VTP Pruning

 By default, VTP pruning is disabled on IOS-based switches. To enable pruning, use the following global configuration command: Switch(config)# vtp pruning If you use this command on a VTP server, it also advertises that pruning needs to be enabled for the entire management domain. All other...

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