The Mechanics of the redistribute Command
The redistribute router subcommand tells one routing protocol to take routes from another routing protocol. This command can simply redistribute all routes or, by using matching logic, redistribute only a subset of the routes. The redistribute command also supports actions for setting some parameters about the redistributed routes—for example, the metric. The full syntax of the redistribute command is as follows: redistribute protocol [process-id] [level-1 | level-1-2 | l..
Caveats Regarding OSPF Network Types over NBMA Networks
When configuring OSPF over Frame Relay, the OSPF network type concept can become a bit troublesome. In fact, many CCIE Routing and Switching lab preparation texts and lab books focus on the variety of combinations of OSPF network types used with Frame Relay for various interfaces/subinterfaces. The following list contains many of the key items you should check when looking at an OSPF configuration over Frame Relay, when the OSPF network types used on the various routers do no..
Summarization is not possible as an after-thought. If network numbers are randomly assigned within an organization, it will be difficult or impossible to find ways to adequately summarize. When designing a network, it is extremely important that careful attention is paid to the requirements for summarization. Figure 2-5 shows that an example corporation might have multiple levels of summarization —within plants, within manufacturing groups, at the divisional level, and to ..
Designing network security for e-mail centers on separating inbound and outbound mail and providing for network virus scanning. This separation is made both for security and to ensure quick delivery of messages without requiring internal users to go outside for mail messages or external senders to come inside the firewall to deliver mail. Network antivirus (in the form of server-based e-mail filtering) is strongly recommended for e-mail because e-mail is the most common infec..
AutoQoS is an extremely useful feature that can take a lot of the mystery out of building a QoS policy. Unfortunately, there are several restrictions on this feature that you need to be aware of. First, it is only available on point-to-point links between routers. This includes point-to-point subinterfaces on ATM and Frame Relay PVCs, as shown in the example. The feature is also available on PPP and HDLC Serial connections. It cannot be used on any multiple access media, inc..
