IOS Router Async Command Glossary IOS Router Command ReferenceCisco IOS Command References
In depth descriptions of all IOS command options

Listed below in alphabetical order is a complete listing of the commands appearing in the sample Async configurations and is intended as a supplemental cross-reference. Included under each command is a brief explanation of how and why the command is used in the example scenario. If more information is required, a quick link to the IOS Command Reference is provided for an easy lookup.
 
appletalk cable-range cable-range [network.node] AppleTalk Cable-Range Command DescriptionIOS Command Reference

This command configures an interface with an AppleTalk cable-range. The interface's Appletalk address can either be randomly generated or explicitly configured. An AppleTalk address is explicitly specified with the "network.node" field. If a randomly generated AppleTalk address is desired, simply omit this field when entering this command. In AppleTalk examples, the AppleTalk addresses are explicitly configured on the routers. This way, it is guaranteed that the router is always identified by the same AppleTalk address which is very useful in troubleshooting scenarios. For a dialed interface, a statically configured address makes the creation of dialer maps much simpler as well.


appletalk routing AppleTalk Routing Command DescriptionIOS Command Reference

This command enables the AppleTalk routing engine on the router.


appletalk static cable-range cable-range to network.node zone zone-name AppleTalk Static Cable-Range Command DescriptionIOS Command Reference

This command creates a static extended AppleTalk route. The first field specifies the destination AppleTalk cable-range. The second field specifies the AppleTalk node address of the next hop used to reach the destination. The third field indicates the AppleTalk zone name of the target network. Normally, this information would be resolved automatically with a routing protocol (e.g. RTMP). However, in the static AppleTalk routing examples, routing protocols are disabled on the dialed interfaces. Instead, each router has a static AppleTalk route entry for every remote AppleTalk cable-range that needs to be reached..

For example, For AppleTalk workstations in Atlanta to reach Boston, Atlanta requires a static route to the cable-range in Boston (cable-range 200-299). The command " appletalk cable-range 200-299 to 900.2 zone Boston" informs Atlanta that the Boston zone and cable-range 200-299 can be reached via the next hop AppleTalk address 900.2. 900 is the cable-range of the segment between Atlanta and Boston. 2 is the node address Boston uses for the dialed async interface. Notice the importance of an explicitly configured AppleTalk address specified with the "appletalk cable-range" command.


appletalk zone zone-name AppleTalk Zone Command DescriptionIOS Command Reference

This command defines the AppleTalk zone name used on the interface.


async default routing Async Default Routing Command DescriptionIOS Command Reference

This command allows the use of routing protocols on an async interface.


async mode dedicated Async Mode Dedicated Command DescriptionIOS Command Reference

This command configures the async interface for use only as a PPP or SLIP connection. This prevents users from establishing a remote console connection or "EXEC session" to the router.


async mode interactive Async Mode Interactive Command DescriptionIOS Command Reference

The async mode interactive command is the opposite of the async mode dedicated command. Dial in users connect to the router in an EXEC session and then specify the connection type (e.g. PPP, SLIP, ARAP) with a command (e.g. ppp default) entered at the router prompt. If used in conjunction with the "autoselect" line command, the connection type can be automatically determined based on the type of data the router samples during the initial physical connections.

Note: This command should only be used if the async interface is answering different connection types. If all users are connecting into the router with PPP, it is much simpler and quicker to use async mode dedicated.


autoselect ppp Autoselect PPP Command DescriptionIOS Command Reference

If async mode interactive is configured, this command enables the router to automatically determine a PPP connection type based upon a sampling of packets received upon initial connection. For example, if the router samples PPP packets upon a connection, a PPP session will automatically begin. If the router detects a carriage return character, an EXEC process will start.


chat-script name expect send expect send ... Chat-Script Command DescriptionIOS Command Reference

The chat-script is used to send text strings to a device. The string is identified with a name and then is composed of a list of expect and send strings. Configuration commands can reference a chat-script by its name if a text dialogue is needed in applications such as logins or modem initializations. The chat-script waits for the character sequence specified in the expect field. If received successfully, the router transmits the character sequence specified in the send field. The process then repeats until the end of the chat-script is reached or a predetermined amount of time has elapsed. Some text strings are reserved for special functions and are detailed in the IOS command reference.

In the examples, 'chat-script dialnum ABORT ERROR ABORT BUSY "" "ATDT \T" TIMEOUT 60 CONNECT' creates a chat-script named dialnum. The script 'dialnum' is referenced by the "script dialer dialnum" line command whenever outbound calls are placed. The script is designed to ABORT if an "ERROR" or "BUSY" response is received from the modem. It then expects nothing ("") and sends "ATDT \T" to the modem to start dialing. \T is actually a special character that informs the router to get the phone number from the dialer map command. The script has 60 seconds to receive a CONNECT message before the string will TIMEOUT with a failure. For more details on special characters such as \T, TIMEOUT, and ABORT, see the IOS command reference.

The 'chat-script rstmdm "" "AT&FS0=1&B1&C1&D2&H1&K1&M4&R2" "OK"' command follows the same logic. This string is sent by the "script reset rstmdm every time a connection resets. The router will expect nothing ("") and then send the AT initialization string for the modem. The init string used in the example is specific for a USRobotics Sportster modem. Other modem manufacturer's settings will vary.


dialer in-band Dialer In-Band Command DescriptionIOS Command Reference

This command specifies an interface as a dialed interface with dialing information passed in-band using V.25bis.


dialer map protocol next-hop-address [name hostname] [broadcast] [dial-string] Dialer Map Command DescriptionIOS Command Reference

Async modem connections are made with a dialer map command. The dialer map command maps a protocol, a protocol address, a name for PPP authentication, and dial information to a specific remote router. It is one of the most important pieces of an async configuration.

As an illustration, in IP example configurations, Atlanta contains the command "dialer map ip 20.1.1.1 name Boston broadcast 16175553333". This tells Atlanta that the destination IP address, 20.1.1.1, can be reached through a router named Boston. If no modem connection to Boston already exists, Atlanta can bring the connection up by dialing 16175553333.

PPP TutorialInfo On PPP And Authentication
Faxback Doc #ppp

dialer rotary-group number Dialer Rotary-Group Command DescriptionIOS Command Reference

This command associates a physical interface with a logical dialer interface defined with the corresponding "interface Dialer" command. In the examples, "dialer rotary-group 0" associates the physical Async1 interface with a logical Dialer0 interface. Async commands pertaining to the physical interface are defined under interface Async1 (e.g. async mode and dialer in-band) whereas commands related to the logical connection are configured under interface Dialer0 (e.g. dialer maps, ppp authentication, dialer parameters). The separation of physical and logical commands allows the ability to scale as the network grows. In the future, modem lines that share the same configurations can be added by simply adding a physical interface to the rotary-group.


dialer-group group-number Dialer-Group Command DescriptionIOS Command Reference

This command directs an interface to use the corresponding dialer-list to determine which traffic types cause the interface to dial and sustain a call. In the examples, interface Dialer0 is configured as "dialer-group 1". The interface will initiate and sustain a modem call for any packets that match the criteria defined in dialer-list 1.


dialer-list dialer-group protocol protocol {permit | deny | list access-list-number} Dialer In-Band Command DescriptionIOS Command Reference

This command defines the traffic types that will trigger and sustain a modem call on interfaces that share the same dialer-group number. In IP examples, "dialer-list 1 protocol ip permit" allows interfaces belonging to dialer-group 1 to dial out and sustain calls for as long as IP traffic needs to be sent. Additional commands such as "dialer-list 1 protocol ipx permit" can be added to the dialer-list. In this case, interfaces that belong to dialer-group 1 may now dial out and sustain the call as long as either IP or IPX traffic needs to be sent.


enable secret password Enable Secret Command DescriptionIOS Command Reference
Enable Secret Command
Enable Password Command DescriptionIOS Command Reference
Enable Password Command

This command defines the enable secret password used to protect access to privileged exec commands. The password is case sensitive and can be defined on the router two different ways. A password set with the "enable password" command is stored as clear text, whereas a password set with "enable secret" is encrypted. For security, configuring the router with an enable secret is preferred. The enable secret always takes precedence if both enable secret and enable password are set.

Note: The unencrypted form of the password "cisco" is shown in the sample configurations. In an actual configuration, the password would appear in an encrypted form: (i.e. enable secret 7 13061E010803 --where 7 denotes the encryption type and 13061E010803 is an encrypted form of the password cisco.) When entering or making changes to the enable secret, always type the password in its unencrypted form. Do not enter the encryption type (7); it is set automatically.


encapsulation ppp Encapsulation PPP Command DescriptionIOS Command Reference

This command specifies ppp encapsulation on an interface.


flowcontrol hardware Flowcontrol Hardware Command DescriptionIOS Command Reference

This command sets hardware flowcontrol on a physical async line. If the router is configured to use hardware flowcontrol, the modem must also be configured for hardware flowcontrol. Hardware flowcontrol uses the RTS/CTS signals to indicate when a device is ready to receive data.


hostname name Hostname Command DescriptionIOS Command Reference

This command gives the router an identity and changes the command prompt (e.g. Atlanta#). If no PPP username is specified at the interface level, the router will send this hostname as the PPP username during PPP authentication.


interface Dialer number Interface Dialer Command DescriptionIOS Command Reference

This command creates a logical dialer interface. The dialer interface allows a single configuration to be applied to a set of physical interfaces called a rotary-group. In the examples, "dialer rotary-group 0" associates the physical Async1 interface with the logical Dialer0 interface. Async commands pertaining to the physical interface are defined under interface Async1 (e.g. async mode and dialer in-band) whereas commands relating to the logical connection are configured under interface Dialer0 (e.g. dialer maps, ppp authentication, dialer parameters). The separation of physical and logical commands allows the ability to scale to network growth. In the future, Async lines that share the same configurations can be added by simply adding a physical interface to the rotary-group.


ip address ip-address subnet-mask IP Address Command DescriptionIOS Command Reference

This command configures an interface with an IP address and subnet mask. In IP routing examples, 10.1.1.1 is the IP address of the ethernet interface in Atlanta and 255.0.0.0 is the corresponding subnet mask. For examples in which IP is bridged, all interfaces on the router are configured with the same IP address because the router is reduced to a simple node on an IP network with only one IP address.


ip classless IP Classless Command DescriptionIOS Command Reference

This command allows the router to forward packets destined to an unrecognized subnet of a directly connected network onto the best supernet route. For example, the 10.0.0.0 network is subnetted with a 255.255.255.0 subnet mask. Let's pretend that the 10.1.1.0 subnet is directly attached to ethernet0 (i.e. interface ethernet0 has the ip address 10.1.1.1 255.255.255.0). Suppose the router receives a packet destined to 10.2.2.0 and the router has no explicit entry for this network. Without the IP classless command, the packet is discarded. However, with the IP classless command, the packet is not discarded, but instead forwarded to the best supernet route if one exists (i.e. a default route).


ip http server IP HTTP Server Command DescriptionIOS Command Reference

This command allows remote configuration and management of the router via a web browser and is available in IOS software versions 11.1 and higher. This command has been included as a convenience to the user and is not necessary for configurations to operate properly.


ip route network subnet-mask {address | interface} IP Route Command DescriptionIOS Command Reference

This command defines a static IP route. The first and second fields define the destination network number and subnet mask. The third field defines the next hop and can either be specified as an IP address or an interface.

Note: Under most circumstances, the third field contains the IP address of the next hop. However, for routes over unnumbered point-to-point interfaces, specify the interface used to reach the destination.

In some statically routed examples, Atlanta has a static IP route to Boston (e.g. ip route 20.0.0.0 255.0.0.0 Dialer0). In these cases, Atlanta knows that IP network 20.0.0.0 (Boston) with a subnet mask of 255.0.0.0 can be reached via interface Dialer0. In other examples, a static IP default route is defined using 0.0.0.0 as both the destination network number and subnet mask. The default route is used if the router does not already have an explicit routing table entry for a destination network. For instance, "ip route 0.0.0.0 0.0.0.0 Dialer0" defines a static IP default route. In these cases, Atlanta forwards all packets not destined for its local network out interface Dialer0.


ip subnet-zero IP Subnet-Zero Command DescriptionIOS Command Reference

When subnetting an IP network, the all zeroes subnet and the all ones subnet are normally discarded as invalid. This command allows the router to recognize the zero subnet range as a valid range of addresses. This command is not necessary if the network is not subnetted, although it does not hurt to include the command in the configuration. For instance, if a router is configured with the address of 206.1.1.1 255.255.255.192 without including the ip subnet-zero command, the error "Bad mask /26 for address 206.1.1.1" would be displayed because 206.1.1.1 is part of the zero subnet.


ip tcp header-compression passive | on IP TCP Header-Compression Command DescriptionIOS Command Reference

This command enables Van Jacobson TCP header compression on an async interface. For PPP connections, the passive option works the same as the on option since compression is part of the PPP negotiation process.


ip unnumbered source-interface IP Unnumbered Command DescriptionIOS Command Reference

This command configures a point-to-point interface to use unnumbered IP addressing. IP unnumbered helps conserve IP addresses and network space. Essentially, the IP address of the source interface is borrowed and used on the serial interface. In the examples, Ethernet0 is used as the source interface.

IP Unnumbered TutorialInfo On IP Unnumbered
Faxback Doc #ip_unnum
 
ipx network network [encapsulation encapsulation-type [secondary]] IPX Network Command DescriptionIOS Command Reference

This command binds an IPX network number and frame type to an interface. If no IPX frame-type is specified, the router will default to Novell 802.3 encapsulation. The network number and frame-type should match the settings bound to existing IPX servers and clients. If no servers exist at the site a new, unique IPX network number must be created.

Possible IPX Frame Types
novell-ether Novell Ethernet 802.3 (default)
arpa Novell Ethernet II
sap IEEE 802.2 on Ethernet, FDDI, Token Ring
snap IEEE 802.2 SNAP on Ethernet, Token Ring, FDDI

It is possible to add more than one IPX network to the same LAN interface as long as different frame types are used. The keyword "secondary" flags the router to add a network as an additional network. Secondary networks can be added for each additional frame type. For instance, in IPX examples, Atlanta has two networks on Ethernet0. IPX network 100 is using 802.2 framing and IPX network 101 is using 802.3 framing.

The async interface also requires its own unique IPX network segment. In IPX examples, the IPX network number for the segment between Atlanta and Boston is AAAA. Therefore, Atlanta's interface Dialer0 to Boston is assigned the AAAA IPX network number and Boston's interface Dialer0 to Atlanta is also assigned the AAAA IPX network number.

Note: Depending on the version of IOS, the field "encapsulation NOVELL-ETHER" may not appear in the configuration because NOVELL-ETHER is the default value.


ipx route network network.node IPX Route Command DescriptionIOS Command Reference

This command creates a static IPX route. The first field specifies the destination IPX network number. The second field specifies the IPX address of the next hop used to reach the destination. Normally, routing information would be resolved automatically with a routing protocol (e.g. IPX RIP/SAP). However, in the static IPX routing examples, routing protocols are disabled on the dialed interfaces. Instead, each router has a static IPX route entry for every remote IPX internal and external network number.

For example, For workstations in Atlanta to access BostonFS, Atlanta requires a static route to the internal IPX network number of BostonFS (IPX network 2000). The command "ipx route 2000 AAAA.0000.0cbb.2222" informs Atlanta that IPX network 2000 can be reached via the next hop IPX address AAAA.0000.0cbb.2222. AAAA is the IPX network number of the segment between Atlanta and Boston. 0000.0cbb.2222 is the MAC address Boston uses for the IPX routing process. This is the same MAC address that appears in Boston's ipx routing command.


ipx routing [node-address] IPX Routing Command DescriptionIOS Command Reference

This command enables the IPX RIP/SAP routing engine on the router. The router associates the specified node-address with the IPX routing process. If no node-address value is supplied the router will automatically supply a node address for the routing process. It is recommended that the router assign the address automatically so that accidental node address duplication does not occur.


ipx sap service-type name network.node IPX-socket hop-count IPX SAP Command DescriptionIOS Command Reference

This command creates a static IPX service announcement and defines the IPX service-type (e.g. type 4 = file service), name, IPX address, IPX socket number, and hops to reach the service. Normally, service announcement information is resolved automatically with a routing protocol (e.g. IPX RIP/SAP). However, in static IPX routing examples, routing protocols are disabled on the dialed interfaces. Instead, a static SAP is created for every remote IPX service that must be reached.

For instance, if clients in Atlanta wish to access BostonFS, Atlanta needs a static SAP for BostonFS. The command "ipx sap 4 BostonFS 2000.0000.0000.0001 451 2" tells Atlanta that an IPX type 4 file service named BostonFS has an IPX address of 2000.0000.0000.0001, uses IPX socket 451, and is two hops away. 2000 is the internal IPX network number of the file server. 0000.0000.0001 is the internal node number of the file server. The service type, service name, and socket number will vary depending on the service (e.g. print servers, file servers).


line vty 0 4 Line VTY Command DescriptionIOS Command Reference

This command defines the number of virtual terminal (telnet) sessions to the router. In the examples, five telnet sessions can be accommodated, numbered 0 to 4. The number of telnet sessions supported varies by platform and amount of memory.


login local | tacacs Line VTY Command DescriptionIOS Command Reference

The login command enables password checking on the line. When the login command is used without the local or tacacs option, authentication is based on the password command set on the line.


modem autoconfigure type modem-name Modem Autoconfigure Command DescriptionIOS Command Reference

This command specifies what modemcap entry to use for an async line. The modemcap file stores a list of modem types and the associated commands used to configure the modem. In the examples, the usr_sportster entry is a preconfigured modem-name with the following parameters:

Modemcap values for usr_sportster
Factory Defaults (FD): &F
Autoanswer (AA): S0=1
Carrier detect (CD): &C1
Drop with DTR (DTR): &D2
Hardware Flowcontrol (HFL): &H1&R2
Lock DTE speed (SPD): &B1
DTE locking speed (DTE): [not set]
Best Error Control (BER): &M4
Best Compression (BCP): &K1
No Error Control (NER): &M0
No Compression (NCP): &K0
No Echo (NEC): E0
No Result Codes (NRS): Q1
Software Flowcontrol (SFL): [not set]
Caller ID (CID): [not set]
On-hook (ONH): H0
Off-hook (OFH): H1
Miscellaneous (MSC): [not set]
Template entry (TPL): usr_courier
Modem entry is built-in.

modem InOut Modem InOut Command DescriptionIOS Command Reference

The command modem InOut allows both incoming and outgoing calls on the line. The router monitors the DSR signal from the modem for inbound calls. When the modem raises DSR, the router will activate the line.


network network Network Command DescriptionIOS Command Reference

This command adds an IP network to RIP routing updates advertised by the router. Only directly connected IP networks should be added. In the examples, Atlanta includes network 10.0.0.0 in its router rip definition because this is directly attached to Ethernet0. Likewise, Boston will include any directly attached networks in its router rip configuration.

Note: Only the major network number is entered for RIP. If a subnet is entered (e.g. 10.1.1.0), it is automatically rounded off to the major network number (e.g. 10.0.0.0).


no appletalk send-rtmps No AppleTalk Send-RTMPS Command DescriptionIOS Command Reference

In statically routed AppleTalk examples, this command is used to block AppleTalk routing updates (RTMP) from being sent out an interface.


no auto-summary No Auto-Summary Command DescriptionIOS Command Reference

This command turns off auto-summarization of routes. When using RIP version 2, variable length subnet masks are accommodated.


no ip address

In the examples, no ip address (or IPX network number) is configured on the physical Async1 interface because all protocol address information is moved to the logical Dialer0 interface.


no ip domain-lookup No IP Domain-Lookup Command DescriptionIOS Command Reference

This command disables the router from translating unfamiliar words typed during a console session into IP addresses. During this lookup, a user cannot enter any commands into the router. Though a useful feature to some, many find it frustrating to wait for the lookup to timeout for every mistyped command. Therefore, the command has been included in the configurations as a convenience and is not a necessary parameter for configurations to operate properly.


no ip routing No IP Routing Command DescriptionIOS Command Reference

IP routing is on by default. For examples in which IP is bridged, this command disables the IP routing engine.


password password Password Command DescriptionIOS Command Reference

This command sets the password for either a console, telnet, or modem connection into the router. A console password is set under line con, a telnet password is set under line vty, and a modem connection password is also set under the corresponding line command.


ppp authentication {chap | chap pap | pap chap | pap} [callin] PPP Authentication Command DescriptionIOS Command Reference

This command enables PPP authentication on an interface and specifies the order in which CHAP or PAP protocols are requested. For example, if set to chap pap, both CHAP and PAP protocols are enabled on the interface. The router will first attempt CHAP authentication and, if unsuccessful, will then attempt PAP. The callin keyword is optional and specifies that authentication is forced for incoming calls only. This is known as unidirectional PPP authentication and is implemented in ISP sample configurations.

Cisco routers support bi-directional authentication if the callin keyword is not supplied. All examples, illustrate a bi-directional authentication scenario. When Atlanta calls Boston, Atlanta forces Boston to identify itself with a username (Boston) and password (gocisco1). Likewise, Boston forces Atlanta to identify itself with a username (Atlanta) and password (gocisco1). With bi-directional authentication, Atlanta is offered the added security that the device answering the ISDN phone call is indeed the router it intended to call.

Unidirectional authentication is used in configurations involving non-Cisco routers that do not support bi-direction authentication. In these cases, when Atlanta calls the remote router, Atlanta does not authenticate the remote site. However, the remote site will authenticate Atlanta before allowing the connection. Proponents of unidirectional authentication believe that, since Atlanta initiated the call, Atlanta must already know who it is calling and therefore authentication is not necessary in that direction.

PPP TutorialInfo On PPP And Authentication
Faxback Doc #ppp
 
router rip Router RIP Command DescriptionIOS Command Reference

This command enables the RIP routing process on the router for TCP/IP.


script dialer chat-scriptname Script Dialer Command DescriptionIOS Command Reference

This command specifies the name of the chat-script used to issue modem dialing commands.


script reset chat-scriptname Script Reset Command DescriptionIOS Command Reference

This command specifies the name of the chat-script used to initialize the modem every time the line is reset.


snapshot client active-time quiet-time [suppress-statechange-updates] [dialer] Snapshot Client Command DescriptionIOS Command Reference

This command configures a router as a snapshot routing client. During a specified active time interval, snapshot clients initiate an modem connection to exchange routing information with a snapshot server. The modem call is initiated for a snapshot update using the dialer map command.

The period in which routes are exchanged is known as the active time interval. The duration of the active interval can range from five to 100 minutes. The quiet time interval exists between active times and can range from eight to 100,000 minutes. During the quiet time, routing updates are suppressed and entries are frozen into the routing table as if they were static entries.

Note: The minimum quiet-time is generally the active-time plus three minutes.

In addition to the active time, snapshot routing updates may also be triggered whenever the line protocol on an interface changes state (e.g. up to down). These conditions can be ignored if the suppress-statechange-updates configuration option is included.

The dialer keyword option allows the router to dial the remote site for the exchange of routing updates if the modem line is not already active.

Snapshot Routing TutorialInfo On Snapshot Routing
Faxback Doc #snapshot
 
snapshot server active-time [dialer] Snapshot Server Command DescriptionIOS Command Reference

This command configures a router as a snapshot routing server. A snapshot server passively answers snapshot client requests for routing updates. For economic use of the modem line, snapshot routing confines normal periodic routing updates to a user configurable interval.

The period in which routes are exchanged is known as the active time interval. The duration of the active interval can range from five to 100 minutes. The quiet time interval exists between active times and the duration is controlled by the snapshot client. During the quiet time, routing updates are suppressed and entries are frozen into the routing table as if they were static entries.

The dialer keyword option allows the router to dial the remote site for the exchange of routing updates if the modem line is not already active.

Snapshot Routing TutorialInfo On Snapshot Routing
Faxback Doc #snapshot
 
speed speed Speed Command DescriptionIOS Command Reference

The commands rxspeed xx and txspeed xx configure the physical line DTE interface baud rate. This is the rate at which the router and modem will communicate. This speed is not the modulation speed between the modems.


stopbits {1 | 1.5 | 2} Stopbit Command DescriptionIOS Command Reference

The stopbits command sets the stopbits in the word length. Cisco routers default to 2 stopbits.


transport input {all | lat | mop | nasi | none | pad | rlogin | telnet | v120} Transport Input Command DescriptionIOS Command Reference

This command defines which protocols will be allowed on the line.


username name password secret Username Command DescriptionIOS Command Reference

This command specifies a PPP CHAP or PAP (depending on which is specified with the ppp authentication command) authentication password for each individual remote user. PPP authentication is implemented with this command in scenarios where dialer maps are used. The username is case sensitive and must match the opposite router's hostname. The password is also case sensitive and must match the password set in the opposite router's corresponding username definition.

For example, Atlanta is configured with "username Boston password gocisco1" and Boston is configured with the command, "username Atlanta password gocisco1". The routers have matching PPP passwords (gocisco1) for each other's username.

Note: The unencrypted form of the password "gocisco1" is shown in the sample configurations. In actual configurations, the password appears in an encrypted form: (i.e. username Boston password 7 13061E010803 - where 7 denotes the encryption type and 13061E010803 is an encrypted form of the password gocisco1.) When entering or making changes to the username and password, type the password in its unencrypted form. Do not enter the encryption type (7); it is set automatically.

PPP TutorialInfo On PPP And Authentication
Faxback Doc #ppp
 
shutdown Shutdown Command DescriptionIOS Command Reference

This command disables an interface. Use "no shutdown" to activate a disabled interface.


version 2 Version Command DescriptionIOS Command Reference

This command specifies RIP version 2 as the routing protocol and is available in IOS software versions 11.1 and later. RIP version 2 is backwards compatible with RIP version 1 and adds the enhanced capability to support variable length subnet masks.


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