Using Route Summarization to Create Default Routes
Generally speaking, route summarization combines smaller address ranges into a small number of larger address ranges. From that perspective, 0.0.0.0/0 is the largest possible summary, because it includes all possible IPv4 addresses. And, as it turns out, EIGRP route summarization supports summarizing the 0.0.0.0/0 supernet, effectively creating a default route. Because route summarization causes a null route to be created for the summary, some Cisco documentation advises agai..
Troubleshooting OSPFv3 for IPv6 should be handled in the same way as OSPFv2 for IPv4. The major difference will be the addressing: OSPFv3 uses the link-local addresses as the source and, when sending directly to a neighbor, destination of packets. Case Study: Frame Relay Mapping Upon initial configuration of Figure 9-17, Skrewt and Hippogriff are configured with the configurations in Example 9-20 and Example 9-21. Example 9-20. Skrewt's initial Frame Relay mapping configur..
Challenges Unique to WLAN Management
WLANs present several unique management challenges. Many relate to the physical aspects of the wireless environment, whereas some are the result of the dynamic nature of the wireless network and its mobile users and devices. Knowledge of these challenges will help ensure that you do not overlook these areas in framing your management strategy for the enterprise-class WLAN. Some of the most commonly experienced problems and challenges you will face include the following: •&..
Verifying and Monitoring Frame Relay Compressions on Cisco Routers
In this section, the various Cisco IOS show commands for verifying and monitoring Cisco proprietary payload compression, FRF.9 payload compression, TCP/IP header compression, and RTP header compression are discussed. NOTE Some of these examples might show varying outputs compared with what you might see on your routers. This is largely due to different Cisco IOS versions and releases loaded onto the routers. The version used here is Cisco IOS Release 12.1(5)T. Also, note th..
The ip ospf priority configuration command allows you to weight the Designated Router (DR) selection process on a network segment. The following configuration examples are for three different routers that all share the same Ethernet segment. Router5 has the highest OSPF priority, so it will become the DR. Router1 has the second highest priority because we want it to be the Backup Designated Router (BDR). Router1 is connected to this network segment through a VLAN trunk: Rout..
