OSPF behaves differently from RIP. The BGP 0/0 route cannot be passed into OSPF viaredistribution. OSPF has different hooks to let the protocol generate the 0/0 into the OSPF atany time, or even better, if the presence of a 0/0-default route is detected in the IP routingtable. Now apply this behavior to the example shown in Figure 8-4.page 223 Figure 8-4. Injecting the 0/0 default into OSPF RTD and RTC receive the 0/0 route via EBGP or point a static default toward th..
A major difference between wireless and wired networks is that wireless LANs use radio waves to transport information through the air. This introduces several new concepts, especially dealing with RF signals. When you are deploying wireless LANs, you must understand the attributes associated with RF signals in order to configure access points, avoid RF interference, and troubleshoot problems as they arise. The key RF signal attributes that you need to understand are as follo..
Distribution routers consolidate connections from access routers. They are often arranged in a configuration that is resilient to failure of a single core router. Distribution routers usually contain topological information about their own region, but they forward packets to a backbone router for inter-region routing. NOTE In smaller regions, distribution and backbone routers may be one and the same. In larger regions, distribution routers themselves may form a hierarchy...
Good Network Security Is Predictable
It is 3 a.m. and you are sleeping like a baby. That's great because you've spent many late nights protecting your new e-commerce site with the best security devices and software money can buy. You have a pair of firewalls that can handle an OC-48, NIDS boxes that allow you to craft your own complex signatures, a very expensive alarm and reporting tool that generates reports for your boss every morning, and the latest in file system checking and log analyzers for your servers...
The following commands configure EIGRP on one router in a simple network: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#interface Ethernet0 Router1(config-if)#ip address 192.168.20.1 255.255.255.0 Router1(config-if)#exit Router1(config)#interface Serial0.1 point-to-point Router1(config-subif)#ip address 172.25.2.2 255.255.255.252 Router1(config-subif)#exit Router1(config)#router eigrp 55 Router1(config-router)#n..
