Distance Vector and Link State Routing Protocols
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How is the telephone system similar to the postal and highway systems? The answer to this question can be found by reviewing the properties of the first two systems we examined to see if similarities with the phone system exist. The first property the postal and highway systems have in common is a routable address. The second common property of these systems is a multiple part routable address that can be used to scale the system as the system grows. A routable address has a ..
PPP over Frame Relay Frame Format
RFC 1973 (PPP in Frame Relay) defines a Frame Relay frame format to encapsulate a PPP encapsulated packet in a Frame Relay frame. Based on RFC 1973, PPP uses Frame Relay as a framing mechanism. The Frame Relay frame format outlined in RFC 1973 closely resembles the Frame Relay frame format defined in RFC 1490 and RFC 2427 (Multiprotocol Interconnect over Frame Relay). Figure 10-3 shows a close comparison between the RFC 1973 PPP over Frame Relay frame format and the RFC 1490/..
IPv6 Route Filtering and Metric Manipulation in RIP
There are several types of route filtering available with RIP and IPv6. The first is a simple summary address, which you can configure on the interface that will be sending this summary information: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#interface FastEthernet0/0 Router1(config-if)#ipv6 rip RIP_PROC summary-address AAAA:99::8:0/109 Router1(config-if)#exit Router1(config)#end Router1# In addition to summ..
OSPF Metric Calculation for Internal OSPF Routes
The process of calculating the cost from a router to each subnet may be intuitive to most people. However, spending a few minutes considering the details is worthwhile, in part to link the concepts with the LSAs, and to be better prepared for questions on the ROUTE exam. This section breaks the discussion into three sections: intra-area routes, interarea routes, a short discussion about cases when both intra-area and interarea routes exist for the same subnet, and an explanat..
