Multihoming Scenario: Addresses Taken from One Provider
In this scenario (depicted in a moment in Figure 3-14), customers are connected to multiple providers. Customers are small enough that they need to take IP addresses from only one of their multiple providers, or they were allocated the addresses while they were single-homed. We will consider two ISPs (ISP1 and ISP2) and their customers: Onenet, Twonet, and Stubnet. For each domain, Table 3-6 lists the IP address ranges, corresponding aggregates, and providers. Figure 3-14. Ad..
1245. PPP Security As described in Chapter 17, “Synchronous Serial Links and Protocols,” PPP provides the capability to use PAP and CHAP for authentication, which is particularly useful for dial applications. Chapter 17 used only the default authentication method for CHAP/PAP—namely, the reliance on a locally configured set of username name password password commands. Cisco IOS supports the use of AAA authentication for PPP using the same general set of commands as used..
WAN Aggregation Router QoS Design
A fictitious company, ABC, Inc., already correctly is classifying and marking (at Layer 3 via DSCP) all 11 classes of traffic from the QoS Baseline Model within its campus. It wants to provision QoS policies for each of these application classes over its WANs as well. ABC, Inc., selected ATM as its primary Layer 2 medium because of its ease of expansion for future bandwidth needs. Each remote branch is connected to the main campus by dual-T1 links (at a minimum), with some l..
Use the logging buffered configuration command to enable the local storage of router log messages: Router#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#logging buffered informational Router(config)#end Router# This feature causes the router to store all log messages to a revolving buffer called the logging buffer. Many network administrators find it convenient and useful to keep detailed router logs on the router itself..
Now that you have reviewed, from a generic perspective, how an IP routing protocol’s data structure interacts with a router’s IP routing table, consider the specific data structures used by EIGRP, as described in Table 6-4.
