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Command Encapsulation Frame-Relay Use This command enables frame-relay on a serial interface. Syntax Router(config-if)#encapsulation frame-relay Example In this example we will configure R4 to use frame-relay as per the diagram above. CopyR4(config)#int s0/0 R4(config-if)#encapsulation frame-relay R4(config-if)#ip add 10.4.4.4 255.255.255.0 R4(config-if)#no shut After that we configure frame relay on …
Command PPP CHAP Hostname Use This command is used to send a hostname to a remote CHAP server for authentication. Syntax Router(config-if)#ppp chap hostname <hostname> Example In this example R1’s S1/1 interface is configured to authenticate R3 using CHAP. CopyR1(config)#int s1/1 R1(config-if)#encapsulation ppp R1(config-if)#ppp authentication chap R1(config-if)# *Mar …
Command IP Split-Horizon EIGRP Use Split Horizon protects against routing loops by not accepting routes on the same interface that a router sends updates out. This normally has to be turned off in hub and spoke topologies to ensure full reachability. Syntax Router(config-router)#network <ip address> OR Router(config-router)#network <ip …
Command Speed Use This command is used to set the speed at which an interface opertates at. Syntax Router(config-if)#speed <number or auto> Options <number> Sets the interface to a given speed, can be 10, 100, 1000 depending on the interface type. <auto> Will autonegotiate the speed of the …
Command CDP Enable Use This command is used to enable CDP on interfaces. By default it is enabled on most interfaces except for frame-relay interfaces. Syntax Router(config-if)#cdp enable Example In this example R1’s S1/1 interface is configured to authenticate R3 using PAP. CopyR1(config)#int fa0/0 R1(config-if)#cdp enable Here we …
Command IP OSPF Network Point to Multipoint Use This command manually sets the OSPF network type to point-to-multipoint. The point-to-multipoint network type does not have an election. Syntax Router(config-if)#ip ospf network point-to-multipoint Example In this example, we will configure R4’s frame-relay link to use the point-to-multipoint network type. …
Command IP OSPF Network Broadcast Use This command manually sets the OSPF network type to broadcast, this is a default for ethernet links. The Broadcast network type has a DR election. Syntax Router(config-if)#ip ospf network broadcast Example In this example, we will configure R4’s frame-relay link to use …
Command IP OSPF # Use Enables OSPF on an interface. Syntax Router(config-if)#ip ospf <Number> Example In this example, OSPF is enabled on int fa0/0 on R1. Before doing so, ospf is disabled at the router level on R1. The empty route table is first displayed. CopyR1(config)#no router ospf …
Command IP Directed-Broadcast Use Enables fowarding of directed broadcasts. When this is turned on for an interface, the interface will respond to broadcast messages that are sent to its subnet. Syntax Router(config-if)#ip directed-broadcast Example In this example, IP directed-broadcasts is enabled on in fa0/0 on R2. A broadcast …
Command Keepalive Use This command changes how often an interface sends a keepalive to prove to its directly connected neighbor it is still up/up. The default is 10 seconds Syntax Router(config-if)#keepalive <seconds> Example In this example, we will lower Fa0/0’s keepalive to 5 seconds . CopyR1(config)#int fa0/0 R1(config-if)#keepalive …
