The Routing Process Simplified
Until now, this chapter has examined discrete aspects of routing—specifically, peer negotiation and static versus dynamic routing. Before diving into details of routing configuration, it makes sense to pause here and briefly overview the BGP routing process in its entirety. BGP is a fairly simple protocol, which is why it's so flexible. Routes are exchanged between BGP peers via UPDATE messages. BGP routers receive the UPDATE messages, run some policies or filters over the ..
This final section of the chapter summarizes some of the core SNMP concepts and details, particularly with regard to features of different SNMP versions. The Simple Network Management Protocol (SNMP), or more formally, the Internet Standard Management Framework, uses a structure in which the device being managed (the SNMP agent) has information that the management software (the SNMP manager) wants to display to someone operating the network. Each SNMP agent keeps a database,..
Business Priorities Must Come First
A university I once worked with decided it was time to allow the student body and faculty wireless access to the campus network. The convenience of access, cost reduction in wiring buildings, and potential productivity increase were the overarching business drivers for the decision. At first blush, however, the security department was reluctant to proceed. For years, the university did not require students to have accounts to access the network. Rather, authentication was re..
Allocating Static IP Addresses with DHCP
The following commands ensure that the router assigns the same IP address to a device each time it requests one: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#ip dhcp pool IAN Router1(dhcp-config)#host 172.25.1.33 255.255.255.0 Router1(dhcp-config)#client-identifier 0100.0103.85e9.87 Router1(dhcp-config)#client-name win2k Router1(dhcp-config)#default-router 172.25.1.1 Router1(dhcp-config)#domain-name or..
Access List Configuration Tasks
Whether you are creating a standard or extended access list, you need to complete the following two tasks: Step 1 Create an access list in global configuration mode by specifying an access list number and access conditions. Define a standard IP access list using a source address and wildcard, as shown later in this section. Define an extended access list using source and destination addresses, as well as optional protocol-type information for finer granularity of contro..
