Designing Servers to Support Management Processes
Servers supporting management processes should be robust and secure. They have been put in place to collect and process data that is required to maintain the integrity of the network. You should place the servers in physically secure locations where they can run without being interrupted. The operating systems must be secured, and remote access to the servers should be extremely limited. Remember that the management stations have access to all the routers in the network, so t..
OSPF optimizes the LSA flooding process on multiaccess data links by using the concept of a designated router (DR). Without the concept of a DR, each pair of routers that share a data link would become fully adjacent neighbors. Each pair of routers would directly exchange their LSDBs with each other as shown in Figure 10-1. On a LAN with only six routers, without a DR, 15 different pairs of routers would exist, and 15 different instances of full database flooding would occur...
When new hosts join a group, routers may need to change the current SPT for a particular (S,G) entry. With PIM-DM, one option could be to wait on the pruned links to expire. For example, in Figure 20-9, R3 could simply quit sending State Refresh messages, and within 3 minutes at most, R3 would be receiving the multicast packets for some (S,G) SPT again. However, waiting on the (default) 3-minute Prune timer to expire is not very efficient. To allow routers to “unprune” a ..
The precise output of the show ip protocols command varies, depending on what features are enabled. However, we have shown several examples of different output throughout this chapter: Router1#show ip protocols Routing Protocol is "eigrp 55" Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Serial0.1 filtered by (prefix-list) Inbound Default networks flagged in outgoing upda..
Using NAT for Server Load Distribution
The rotary keyword allows you to do simple NAT-based load balancing of servers: Router#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#interface FastEthernet0/0 Router(config-if)#ip address 192.168.1.1 255.255.255.0 Router(config-if)#ip nat inside Router(config-if)#exit Router(config)#interface FastEthernet0/1 Router(config-if)#ip address 192.168.2.1 255.255.255.0 Router(config-if)#ip nat outside Router(config-if)..
