In recent years, Data Centers have had to accommodate increasingly high structural loads. Data Center devices big and small have gotten heavier, putting greater strain on the rooms and buildings that house them. When designing your server environment, it is prudent to prepare for equipment that can weigh 1500 pounds (680.3 kg), 2000 pounds (907.2 kg), or even more, in a single cabinet location. (Even if your room doesn't have to support such massive equipment today, it may ne..
Dedicated Internet access is commonly provided at speeds of 56 kbps or 64 kbps up to T1/E1 lines (1.5 and 2 Mbps, respectively) on the lower end and T3/E3 (45 and 34 Mbps, respectively) and OC3 (155 Mbps) on the higher end. Dedicated Internet access providers are also beginning to provide OC12 (622 Mbps) and even OC48 (2.5 Gbps) high-speed access services. Dedicated access connections are used when bandwidth utilization is predictable and the frequency of network access is hi..
Extracting Router Information via SNMP Tools
To extract router information via SNMP, we will use the suite of SNMP tools provided with the NET-SNMP toolkit. Use snmpget to extract a single MIB object from the router's MIB tree. This example uses snmpget to extract the router's system contact information: freebsd% snmpget v1 c ORARO Router .1.3.6.1.2.1.1.4.0 system.sysContact.0 = Helpdesk 800-555-2992 Use snmpset to alter MIB objects within the router's MIB tree. The next example demonstrates how to modify MIB va..
You can improve NTP reliability by configuring several redundant servers. The reliability is better still if the router uses different paths to reach these servers: Router#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#clock timezone EST -5 Router(config)#clock summer-time EDT recurring Router(config)#ntp server 172.25.1.1 Router(config)#ntp server 10.121.33.231 Router(config)#ntp peer 192.168.12.12 Router(config)#end R..
Configuring a Basic MPLS P Router
For the P routers in the core of the MPLS network, the primary requirement is to enable CEF and turn on MPLS on each of the interfaces that will be forwarding MPLS tagged packets. In this example, we have also enabled OSPF as a dynamic routing protocol within the MPLS core: Router-P1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router-P1(config)#ip cef Router-P1(config)#mpls ip Router-P1(config)#interface FastEthernet0/0 Router-P..
