VPN Types Based on Business Functionality
VPNs are set up to achieve some business goals. These business goals can be used to classify VPNs into two further categories: Intranet VPNs Extranet VPNs Intranet VPNs Intranet VPNs are created to connect two or more private networks within the same organization. These often come into existence when a remote office needs to be connected to headquarters or when a company is acquired and needs to have its network integrated into the acquirer's main network. Extranet VPNs ..
The show ip ospf database Command
The show ip ospf database command shows all the entries in the OSPF link-state database and the information taken from the LSAs that have been received. It can be tailored to show specific information from the database, such as the Type 2 LSAs. To make the output specific to the LSA that you wish to examine, specify the appropriate parameter. Router#show ip ospf database [router | network |summary | asbr-summary | nssa- external | external | database-summary] Another c..
The point-to-point model is the most robust of the four models—each PVC is treated as a point- to-point subinterface. Therefore, losing a single PVC does not cause loss of connectivity. Instead, each point-to-point subinterface is a separate subnet. Each PVC can have different costs, according to the CIR. Point-to-point has faster convergence than any other model and allows for partial mesh. The point-to-point model has a serious problem with flooding, however..
PPP can negotiate to use Layer 2 payload compression, TCP header compression, and/or RTP header compression. Each type of compression has pros and cons, with the most obvious relating to what is compressed, as shown in Figure 17-4. Figure 17-4 Fields Compressed with Compression Features Comparing payload compression and header compression, payload compression works best with longer packet lengths, and header compression with shorter packet lengths. Header compressio..
Baseline Configuration for EIGRP Redistribution Examples
The best method to see the results of redistribution is to use examples, so this section explains the sample internetwork used in the upcoming EIGRP redistribution examples. Figure 9-6 shows the sample internetwork. In this case, the EIGRP domain on the left uses subnets of class B network 172.30.0.0, and the OSPF domain on the right uses subnets of class B network 172.16.0.0. Note that all OSPF subnets reside in area 0 in this example internetwork, although that is not a re..
