Policy Routing Based on Traffic Source/Destination
Policy routing can also be based on a source/destination combination, as illustrated in Figure 8-7. Figure 8-7. Policy Routing Scenario Based on Source and Destination Assume that RTA wants to use the SF link for any traffic originating from network 10.10.10.0/24 and reaching network 12.12.12.0/24 in NY. Also, RTA wants to use the SJ link for any traffic originating from network 10.10.10.0/24 and reaching network 13.13.13.0/24 in NY. Policy routing can be used to set t..
The Cisco IOS CLI includes several methods to get help at the CLI. Many of you already use these features out of habit, but for completeness, the full set of features is listed in Table 24-7. Table 24-7 Cisco IOS Software Command Help 1command represents any command, not the word command. Likewise, parm represents a command’s parameter, not the word parameter. 2When you type the?, the Cisco IOS CLI reacts immediately; that is, you don’t need to press the Enter k..
Simple Network Management Protocol
SNMP is an application layer protocol used to manage IP devices. SNMP is part of the TCP/IP application layer suite. SNMP enables network administrators to view and change network parameters and monitor connections locally and remotely. Managing network performance over a period of time is one of the major functions that SNMP provides. There are three versions of SNMP: • SNMP Version 1 (SNMPv1) • SNMP Version 2 (SNMPv2) • ..
This is the one recipe in this book that we hope none of our readers ever need to use. The main reason for creating an exception dump of your router memory contents is to help Cisco's TAC in diagnosing catastrophic software problems with one of your routers. When you have these types of extreme problems, however, the TAC will often ask to do an exception dump on the router. So we have included this recipe so that you'll know what to do if it ever becomes necessary. An excepti..
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..
