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Command Duplex Use This command is used to set the duplex mode on an interface. Syntax Router(config-if)#duplex <auto or full or half> Option <auto> Automatically determine the duplex mode by checking with the neighbor <full> Sets full duplex mode <half> Sets half duplex mode Example In this example, …
Command Encapsulation Use This command sets the encapsulation type for an interface. Syntax Router(config-if)#encapsultion <mode> Serial Options <hdlc> This is the default encapsulation, it provides a simple serial link. <ppp> This enables ppp on the link, it provides link authentication and many other features. <frame-relay> This enables frame-relay …
Command PPP Authentication PAP Use This command is used to authenticate a link using PAP. Syntax Router(config-if)#ppp authentication pap Example In this example, R1’s S1/1 interface is configured to authenticate R3 using PAP. CopyR1(config)#int s1/1 R1(config-if)#encapsulation ppp R1(config-if)#ppp authentication pap R1(config-if)# *Mar 2 01:42:38.237: %LINEPROTO-5-UPDOWN: Line protocol on …
Command IP NAT Outside Use This command is used to set an outside interface for NAT translation. Syntax Router(config-if)#ip nat outside Example In this example, we will set R2’s Fa1/0 to be an outside NAT interface. CopyR2(config)#access-list 10 permit 10.1.1.0 0.0.0.255 R2(config)#ip nat pool REACH 10.2.2.5 10.2.2.10 netmask …
Command Frame-Relay Map IP Use This command statically configures frame-relay DLCI information Syntax Router(config-if)#frame-relay map ip <ip address> <dlci> broadcast Options <broadcast> Allows the mapping to forward multicast and broadcast across the PVC. Example In this example, we will configure R4 to use frame-relay as per the diagram …
Command PPP PAP Sent-Username Use This command is used to send a username and password to a remote PAP server for authentication. Syntax Router(config-if)#ppp pap sent-username <username> password <password> Example In this example, R1’s S1/1 interface is configured to authenticate R3 using PAP. CopyR1(config)#int s1/1 R1(config-if)#encapsulation ppp R1(config-if)#ppp …
Command PPP Authentication CHAP Use This command enables CHAP authentication on the PPP link. Syntax Router(config-if)#ppp authentication chap Example In this example, we will configure R1’s S1/1 inteface 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 2 01:42:38.237: %LINEPROTO-5-UPDOWN: Line protocol on …
Command IP Split-horizon Use Split Horizon protects against routing loops by not accepting routes on the same interface that a router sends out the updates out. This normally has to be turned off in hub and spoke topologies to ensure full reachability. Syntax Router(config-if)#no ip split-horizon Example In …
Command IP RIP Receive Use This command is used tell RIP what version to receive its updates in for a specified interface. Updates can be sent in Version 1, Version 2, or both. It is useful if you have a legacy host that runs RIP but only supports …
Command IP OSPF Dead-Interval Use Sets the OSPF dead interval for the interface. Syntax Router(config-if)#ip ospf dead-interval <seconds> Example In this example, the dead-interval is configured R1’s int fa0/0. Here’s the ospf interface information before the changes. CopyR1(config-if)#do show ip ospf interface fa0/0 FastEthernet0/0 is up, line protocol is …
