Defining Requirements and Roles
Assuming you have decided that building your own Data Center is the right business decision, then the first step in a successful Data Center project is defining the room's purpose. Why is your company building this Data Center? What needs must it meet? What specific functions does it need to perform, and perform well, to be considered a success? What level of availability does your business require? These are obvious questions, but in the rush to get your complex, potentially..
Because of the use of radio waves, wireless LANs is susceptible to several sources of RF interference. Interfering signals cause delay and reduce throughput. If no 802.11 frame transmissions are in process when the interference is present, then the result will be medium access delays. In some cases, this delay can be indefinite. RF interference causes data frames in transit to become corrupted, resulting in a retransmission. The destination disregards the incoming frame, bec..
In previous sections about Cisco switching techniques, we discussed how fast switching is performed, how cache is created from the routing table, and what information is kept in cache. You might be wondering how the cache is populated. During the case study, the text discusses what happens when a packet that must be fast-switched reaches the router. The cache is built from the routing table. In the scheme prior to CEF, the routing table is built when the routing..
Configuring an Async Serial Interface
Cisco has a class of serial modules that can support either synchronous or asynchronous communications, as required. You can use the physical-layer async command to change the interface from the default synchronous to asynchronous mode: Router3#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router3(config)#interface Serial1/7 Router3(config-if)#physical-layer async Router3(config-if)#encapsulation ppp Router3(config-if)#exit Router3(con..
Configuring RIP for IPv6 is somewhat different from how it is configured for IPv4. To enable RIP for IPv6, you must create a routing process. and then assign interfaces to this process: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#ipv6 unicast-routing Router1(config)#ipv6 router rip RIP_PROC Router1(config-rtr)#exit Router1(config)#interface FastEthernet0/0 Router1(config-if)#ipv6 address AAAA:5:1/64 Router1(..
