Configuring a Destination as an Unconditional Trunk (Optional)
To tag the monitored traffic as it leaves a destination, configure the destination as a trunk before you configure it as a destination. To configure the destination as a trunk, perform this task: This example shows how to configure a port as an unconditional IEEE 802.1Q trunk: Router(config)# interface gigabitethernet 5/12 Router(config-if)# switchport Router(config-if)# switchport trunk encapsulation dot1q Router(config-if)# switchport mode trunk
Simple Password Protection for the CLI
Figure 21-1 provides a visual reminder of some hopefully familiar details about how users can reach a router’s CLI user mode, and move into enable (privileged) mode using the enable command. Figure 21-1 Router User and Enable Modes Figure 21-1 shows three methods to reach user mode on a router. The figure also applies to Cisco IOS–based switches, except that Cisco switches do not have auxiliary ports. Cisco IOS can be configured to require simple password p..
PPP standards can be separated into two broad categories—those features unrelated to any specific Layer 3 protocol, and those specific to a Layer 3 protocol. The PPP Link Control Protocol (LCP) controls the features independent of any specific Layer 3 protocol. For each Layer 3 protocol supported by PPP, PPP defines a Network Control Protocol (NCP). For instance, the PPP IPCP protocol defines PPP features for IP, such as dynamic address assignment. When a PPP serial link f..
Using an RSM in conjunction with a Catalyst 5000 can be a very effective combination for medium-sized networks with moderate Layer 3 bandwidth requirements. Although it is faster than most router-on-a-stick implementations, its speed is not enough for many larger campus backbone applications. Instead, it is the RSMs integration into the Catalyst 5000 architecture that makes it most appealing. Features such as ease of configuration, an intuitive interface, a wide range of supp..
You can disable the sending of RIP updates on all interfaces with the passive-interface default command: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#router rip Router1(config-router)#passive-interface default Router1(config-router)#no passive-interface FastEthernet0/0.1 Router1(config-router)#network 172.22.0.0 Router1(config-router)#network 172.25.0.0 Router1(config-router)#network 192.168.1.0 Router1(config-r..
