configure interfaces

configure Ethernet interface

configure serial interface

configure E1 interface

configure T1 interface

Configure PRI interface

Configure BRI interface

configure DTU interface

configure MODEM interface

configure logic interface

examples of interface configurations

 

Details about configuration tasks , refer to “ examples of interface configuration”.

Details about hardware technology description and information about installing interface, refer to manual of hardware installing and configuration, Details about interface instructions, refer to “interface configuration instructions”.

 

configure Ethernet interface

This chapter will discuss how to configure Ethernet interface. The router support 10Mbps Ethernet interface and 100Mbps quick Ethernet interface. Details are following, the first step is necessary, other steps are optional.

appoint Ethernet or quick Ethernet interface

You can input instructions following in overall situation configure mode to enter the mode of  ethernet interface configuration

 

instruction

purpose

interface ethernet slot/port

Enter the mode of  ethernet interface configuration

interface fastethernet slot/port

the mode of  quick ethernet interface configuration

show interface Ethernet” can display Ethernet interface state. show interface Ethernet can display quick Ethernet interface state.

configure 100Mbps quick Ethernet interface

Our routers’quick ethernet interface support routers ,hubs and switchs with 10Mbps and 100Mbps or with 100BaseT or 10BaseT interface . it can support 10Mbps and 100Mbps auto-adapted speed, that is to say, it can choose a fit speed according to connecting equipment. The configuration courses from management are following:

    

step

instruction

purpose

1

configure

Enter the mode of overall configuration

2

interface fastethernet slot/port

Enter quick Ethernet configuration mode

3

ip address address subnet-mask

Set IP address and mask on interface

configure the speed of quick ethernet

The speed of quick Ethernet can realize auto or through  configuring interface

instruction

purpose

Speed {10|100|auto}

Set speed to 10M,100M or auto

No      speed

Renew to default ,speed is auto

 

quick ehternet duplex mode configuration

         Duplex mode of quick Ethernet can realize auto or through configuring interface

instruction

purpose

Duplex half

Set to semi-duplex mode

Duplex full

Set to full-duplex mode

No duplex

Renew to default, duplex mode is auto

 

configure Ethernet sub-interface

This part will introduce how to configure Ethernet sub-interface. Router support iEEE 802.1Q on Ethernet sub-interface. Details are following:   

appoint Ethernet sub-interface

encapsulation 802.1Q

appoint Ethernet sub-interface

You can input instructions below to enter the mode “Ethernet interface configuration” in “overall situation configuration” mode.

instruction

purpose

interface ethernet slot/port。subinterface-number

Enter Ethernet sub-interface configuration mode

interface fastethernet slot/port。subinterface-number

Enter quick Ethernet  sub-interface configuration mode

encapsulation 802.1Q

You must  encapsulate 802.1Q to Ethernet sub-interface  or it can not be used, or the protocol can not UP.

instruction

purpose

encapsulation dot1q vlan-identifier

encapsulation 802.1Q and appoint vlan ID

 

 

configure serial interface

     This part will introduce how to configure serial interface, Details about hardware , please refer to  “hardware install and configure”. Details about serial interface instruction ,please refer to “interface instructions”, Other instructions documents can  lookup from instructions index. The content are:  

configure synchronization serial interface

configure low-speed serial interface

configure synchronization serial interface

Steps are following, the first step is necessarry,  others are optional.

appoint sychronization serial interface

set appoint sychronization serial interface encapsulation

For examples ,refer to “ examples of interface configurations”.

appoint sychronization serial interface

You can input instructions below to appoint synchronization serial interface and enter the mode " interface configuration" in "overall situation configuration" mode.(if it is a asynchronism card, you should replace “serial” by “async.”

instruction

purpose

interface serial slot/port

Enter” interface configuration”

interface serial slot/port:channel-group

Enter” channel E1 interface configurations”

Set appoint sychronization serial interface encapsulation

If default , sychronization serial interface take HDLC encapsulation. It provides “synchronization framing” and “error checking “ of HDLC in mode of without windows or  re-transmit.  Sychronization serial interface support following protocols:

HDLC

Frame Relay

PPP

·X.25

SDLC  

You can set encapsulation protocol through following instructions in the mode of interface configuration:

instruction

purpose

encapsulation {hdlc|frame-relay|ppp|x25|sdlc}

Configure synchronization serial encapsulation protocol

The kind of encapsulation should depend on practical application. You can also get knowledge in “interface configuration instructions”.

configure low-speed serial interface

This part will introduce to how to configure low speed serial interface, you can get an example form “ examples of low speed serial interface”.

Low speed serial interface often support synchronization and asynchronism , you can use following instructions to choose one way:

instruction

purpose

physical-layer mode {sync |async}

Choose “synchronization” or “asynchronism”

In asynchronism mode ,the interface will support all instructions on standard asynchronism interface. The default is synchronization .If you want to change from asynchronism to synchronization, you can use following instructions in interface configurations mode:

instruction

purpose

no physical-layer mode

Going back to default-- synchronization

You can configure its speed in the interface, use following instructions in interface configurations mode:

 

instrution

purpose

physical-layer speed speed

Set interface speed

The speed values supported by asynchronism or synchronization are following:

 

Synchronization interface

Asynchronism interface

1200240048009600144001920038400 5760064000115200128000256000512000,10240002048000

120024004800960014400192003840057600115200

configure E1 interface

 

Introduction of E1 interface

 

There are two configurations to E1 interface:

  Use as channelized E1 interface

   Interface can be divided into 31 time intervals physically , you can divide them into some groups as you like, every tied group will be served as a interface, its logic features is the same as synchronization serial interface, support PPP, frame relay, LAPB , X.25 and etc. link layer protocols.  

   Use as unchannelized E1 interface

  This interface can be seen as a 2Mbps G.703 synchronization serial interface, support PPP, frame relay, LAPB , X.25 and etc. link layer protocols.

E1 interface configurations

You need to firstly input “controller E1” in "overall situation configuration" mode to configure E1 interface.

 

instruction

purpose

controller E1 <slot>/<group>

Configure E1 interface

Slot is serial number E1 controller locating

Group is line serial number to E1 controller

 

for an example:

Router_config#controller E1 2/0

Router_config_controller_E1_2/0#

E1 interface configurations tasks include:

l      configure E1 interface physical parameter, including frame verify way, line coding/decoding format, line clock, back-loop transportation mode and etc. usually, the default value is ok.

l      Channelized E1 need to configure channel-group parameter, to set time interval binding way.

l      Unchannelized E1 do not need to configure channel- group parameter.

l      configure interface parameter

configure E1 interface work mode

Default is Channelized , but you can change to unchannelized by “unframed”.

 

instruction

purpose

unframed

Configure to “unchannelized”

No unframed

Configure to  “ Channelized”

for an example:

Router_config#controller E1 2/0

Router_config_controller_E1_2/0# unframed

Router_config_controller_E1_2/0# no unframed

configure E1 interface frame verify mode

E1 interface support” CRC32 verify” to physical frame, default is “ no verify”

instruction

purpose

Framing crc4

Configure E1 interface frame verify mode into 4bytes “CRC verify”

No framing or framing no-crc4

Configure E1 interface without frame verify

configure E1 interface line coding/decoding format

E1 interface line support two coding/decoding format: AMI and HDB3

Default is HDB3 .

instruction

purpose

Linecode ami

configure E1 interface line coding/decoding format into AMI

No linecode or linecode hdb3

configure E1 interface line coding/decoding format INTO HDB3

Configure E1 interface clock mode

 

When E1 is used as synchronization interface, there are two work modes: “DTE” and “DCE”, you need to choose line clock also. When E1 interfaces of two routers are directly connected , it is necessary to let two interfaces work at “DTE” OR “DCE”; when E1 of a router is connected into a switch ,because switch is a “DCE”  device, E1 of a router need to work at  “DTE”  mode. 

The default work mode of E1 is DTE.

instruction

purpose

Clock interval

Configure E1 to “DCE”, use synchronization in chip

Clock external

Configure E1 to “DTE”, use line asynchronism

configure E1 interface back-loop transportation mode

In remote back-loop transportation mode, E1 will send back message from the tunnel from which it receives the message.

 

instruction

purpose

Loopback local

Configure E1 to remote loopback mode

No loop

Cancel remote loopback setting

configure E1 send pulse mode

   

Choose send pulse mode. When cable is 120Ω twisted-pair, choose Cable 120.

Default is 75Ω coax cable, according with “ITU-T G.703”. They send pulse differently.

 

instruction

purpose

Cable 120

Configure E1 interface cable to “120Ω twisted-pair”

No cable

Default is 75Ω coax cable

disabled E1 interface line

You can disabled some E1.  Just make all lines state on interface is “down”. 

 

 

instruction

purpose

shutdown

Disabled E1 interface line

No shutdown

Restart E1 interface line

for an example:

Router_config#controller E1 2/0

Router_config_controller_E1_2/0#shutdown

Router_config_controller_E1_2/0#no shutdown

configure E1 interface channel-group parameter

   Channel-group is tunnel number of E1, ranging from 0-30, timeslot is time interval number of E1, ranging from 1-31. Tunnel can use any indistributive timslot, and can group timeslot free. New interface will form after successfully configuring E1. 

“no channel-group” will clear   channel-group timeslots binding ,the corresponding interface will delete also.

    

 

instruction

purpose

channel-group channel-group timeslots { number | number1-number2 } [,number | number1-number2 ... ]

Binding timeslots of E1 to channel-group

no channel-group channel-group 

Cancel channel-group timeslots binding

for an example:

Router_config#controller E1 2/0

Router_config_controller_E1_2/0#channel 5 timeslots 18,11-13,20,22,30-28,24-25

Router_config_controller_E1_2/0#interface s0/0:5

Router_config_interface_s1/0:5#

configure E1 interface parameter

In Channelized mode, after configuring E1 channel-group parameter, a new interface will appear. Its logic characters are the same as synchronization. Its name is “ serial<slot>/<group>:<channel-group>”, and  <slot> and <group> are consistent with  <slot> and <group> in “controller E1 <slot>/<group>”.

In Unchannelized mode, after configuring E1 channel-group parameter, a new interface will appear. Its name is serial<slot>/<group>:0

You can encapsulate PPP, frame relay, HDLC , SDLC ,X.25 and etc.line layer protocols on  interface.

for an example:

in Chanelized mode:

Router_config#controller E1 2/0

Router_config_controller_E1_2/0#channel 1 timeslots 1-31

Router_config_controller_E1_2/0#int s0/0:1

Router_config_controller_s1/0:1#enca fr

Router_config_controller_s1/0:1#ip add 130.130.0.1 255.255.255.0

In Unchannelized mode

Router_config#controller E1 2/0

Router_config_controller_E1_2/0#unframed

Router_config_controller_E1_2/0#int s0/0:0

Router_config_controller_s1/0:0#enca fr

Router_config_controller_s1/0:0#ip add 130.130.0.1 255.255.255.0

 

Configure T1 interface

Introduction to T1 interface

As a channelized T1 interface.

Interface is separated into 24 slots on physics, which can be separated into several units. Bind up each unit to be an interface. It supports data link layer protocol such as PPP, FR,LAPB, and X.25.

T1 Interface Configuration

To configure T1 interface, enter controller T1Command under Global configuration mode.  

Command

Function

controller T1 <slot>/<group>

Configure T1 interface

Slot is the slot number in T1 controller

Group is link number in T1 controller

 

Example:

Router_config#controller T1 2/0

Router_config_controller_T1_2/0#

T1 interface configuration tasks including:

l         To configure T1 interface physical parameter, including Frame mode, decoding/encoding format, line timer,and loop back transmission mode. Use default parameters.

l         Channelized T1 interface requests for channel-groupparameter configuration. Confirm the method to binding slots.

l         Configure interface parameter,

Configuring T1 interface Frame mode

T1 interface supports 2 modes: ESFmode and SFmode.

The default is ESFmode.  

Command

Function

framing sf

Configure T1 interface Frame mode as SFmode

no framing or framing esf

Configure T1 interface Frame mode as ESFmode

Configure T1 interface encoding/decoding format

T1 interface supports one encoding/decoding format: B8ZS

B8ZS is default.  

  Command

Function

no linecode or  linecode b8zs

Configure T1 interface encoding/decoding format as B8ZS

 

Configure T interface timer

When T1 is used as synchronizing interface, DTE and DCE needs to choose timer as well. When 2 routers T1 interfaces connect to each other, the routers have to work under DTE and DCE. When T1 interface connects to a switch, the switch is DCE and router's T1 interface has to work under DTE.

T1 interface works under DTE by default.  

Command

Function

clock internal

Configure T1 interface works under DCE and uses chip synchronized signal

clock external

Configure T1 interface works under DTE and uses line synchronized signal

Configure T1 interface transmission mode

Under remote loop transmission mode, T1 transfers back the packet received from the interface.  

Command

Function

loopback local

Configure the local loop in T1 interface

Loopback remote

Configure the remote loop in T1 interface

no loop

Cancel remote loop configuration

Configure T1 sending pulse mode

choose a pulse sending mode. The cable is 100 ohm. There are 5 distances for Short type cables: 133ft, 266ft, 399ft, 533ft, 655ft; when the cable type is Long Haul, there are 4 decreasing level: 0db, -7.5db, -15db, -22.5db. Long and 0db by default.  

 

Command

Function

Cablelength long {0db, -7.5db, -15db, -22.5db}

Configure T1interface cable type as Long

Cablelength short {133ft, 266ft, 399ft, 533ft, 655ft}

Configure T1 interface cable type as Short

No cable

Long and 0db by default.

example:

Router_config#controller T1 2/0

Router_config_controller_T1_2/0#cablelength short 133ft

Router_config_controller_T1_2/0#no cablelength

Router_config_controller_T1_2/0#cablelength long –15db

Disable T1 interface link

Users can disable a T1 interface. it can make each line statue on the  interface  as down.  

Command

Function

Shutdown

Disable T1 interface link

No shutdown

Restore the T1 interface link

example:

Router_config#controller T1 2/0

Router_config_controller_T1_2/0#shutdown

Router_config_controller_T1_2/0#no shutdown

Configure chann el-groupparameter for T1 interface

channel-group is T1 channel No., ranging from 0-23. Timeslot is T1 slot, ranging from 0-23. Channels can use any slots that is not allocated, and channels can compose any slots together as well. Configuring a T1 channel produce a new interface.

no channel-group clears channel-group slot binding and the corresponding interfaces are also deleted. 

Command

Function

channel-group channel-group timeslots { number | number1-number2 } [number | number1-number2 ... ] speed {  56  |  64 }

Bind up T1 interface slots as channel-group and limit its speed as 56 K or 64 K. (64K by default)

no channel-group channel-group 

Cancel channel-group slot binding

Example:

Router_config#controller T1 2/0

Router_config_controller_T1_2/0#channel 5 timeslots 18, 11-13, 20, 22 speed 56

Router_config_controller_T1_2/0#interface s0/0:5

Router_config_interface_s1/0:5#

Configuring T1 interface parameters

Under channelized method, after configuring channel-groupparameter, the system produce a new interface. The name is serial<slot>/<group>:<channel-group>, where <slot> and <group> are the same as controller T1 <slot>/<group>.

This is able to encapsulate link layer protocol such as PPP, HDLC, SDLC and X.25 on the interface.

Example:

Channelizing methods are as follows:

Router_config#controller T1 2/0

Router_config_controller_T1_2/0#channel 0 timeslots 0-23

Router_config_controller_T1_2/0#int s2/0:0

Router_config_controller_s1/0:1#enca fr

Router_config_controller_s1/0:1#ip add 130.130.0.1 255.255.255.0

Configure PRI interface

Introduction to PRI interface

PRI interface is a 30B+D ISDN interface. The number of  B channel of our PRI interface can be configured according to users requirement. No need to take up 30 B channels. With E1 interface, users are able to dynamically establish or delete PRI interface. E1 interface can configure E1 slots to be a normal serial interface or a  B channel of PRI interface by Command way. When a E1 interface configure one or several slots as B channel(s) for PRI, the 15th slot is always taken by PRI interface ,as a D channel for PRI interface alternate signal.

PRI interface Configuration

To Configure PRI interfaceEnter controller E1 Command under global configuration mode.

Command

Function

controller E1 <slot>/<group>

Configure E1 interface

slot is the slot number in E1 controller

group is link number in E1 controller

 

Command

Function

Pri-group timeslot num

num: B channel may allocate several slots. When these slots are in successive order, use -, if not, use ,.

  The Command establish a major work group and allocate slots for major work groups. 0 and 16th slots can not be used and other slots can be allocated to B channel. Each slot corresponds to one B channel. Each B channel corresponds to a virtual 64K connection by the encapsulation protocal on D channel. Users have to establish major work groups and allocate B channels slots before allocating D channels.

Use int serial slot/port:15 to enter  D channels. After entering D channel, users may encapsulate protocol , set dial group and set dial mapping.

Configure BRI interface

Introduction to BRI interface

BRI is a 2B+D ISDN interface. D channel is used to establish the signal alternating channel with the interface , B channel is used for data transmission.

BRI interface Configuration

To configure BRI interface, users must be under ISDN BRI interface configuration mode.  

Command

Function

interface bri <slot>/<group>

Enter ISDN BRI interface

slot is the slot number in BRI controller

group is the link number in BRI controller

 

configure DTU interface

    This part will introduce how to configure DTU interface. Router 1750/26202621/2630and 2650 support DTU interface. Steps are following:

 

· appoint DTU interface

· configure DTU interface work mode

·configure DTU interface rate mode

· configure DTU interface speed 

·configure DTU interface loop function

 

appoint DTU interface

You can input instructions below to enter the mode "DTU interface configuration" in "overall situation configuration" mode.

instrution

purpose

interface bm <slot>/<port>

Configure DTU interface

for an example:

router_ config #interface bm2/0

configure DTU interface work mode

instrution

purpose

linemode nt

Configure DTU interface to NT work mode

linemode lt

Configure DTU interface to LT work mode

Default is NT work mode.

For an example: configure DTU interface to work in LT mode.

     router_ config bm2/0#linemode lt

 

configure DTU interface rate mode

instrution

purpose

ratemode A

Configure DTU interface to A rate mode (normal mode)

ratemode B

Configure DTU interface to B rate mode (X50 compatible mode )

Default is A rate mode.

For an example: configure DTU interface to work in B rate mode.

router_ config bm2/0#ratemode B

Configure DTU interface speed

instruction

purpose

physical-layer speed  speed

Appoint interface speed

supported speed values are following:

Speed value

explains

9600,19200,38400,64000,128000

Default is 128000

for an example: configure DTU interface speed to 64K.

    router_config bm2/0#physical-layer speed 64000  

 

configure DTU interface loop function

instrution

purpose

loopback local

Configure DTU interface to local loop mode

loopback remote

Configure DTU interface to remote loop mode

For an example: configure DTU interface to work in remote loop mode.

    router_ config bm2/0#loopback remote

configure MODEM interface

This part will introduce how to configure logic interface, include:

· appoint MODEM interface

· configure MODEM interface

· how to connect to v.92 MODEM and the MODEM which does not support V.42bis  

· SOLVE THE PROBLEM THAT AM CARD CANNOT CONNECT WITH OTHER MODEM

 

appoint MODEM interface

You can input instructions below to enter the mode "MODEM interface configuration" in "overall situation configuration" mode.

instruction

purpose

interface async <slot>/<port>

Configure MODEM interface

for an example:

router_ config #interface async2/0

configure MODEM interface

MODEM interface is a asynchronous port which connects to another MODEM. See configuring asynchronous port and dialing configuration for its configuration.  

Note: To configure MODEM interface speed, interactivemode and flow control are invalid. Users need to configure AT Command to implement that.

Example:

router_config#interface async2/0

router_config_a2/0#line dial (modeminterface只能在拨号mode下收发数据)

router_config_a2/0#line dial (modeminterface receives and sends data only under dial mode)

router_config_a2/0#ip add 10.1.1.1 255.255.255.0

router_config_a2/0#dialer string 50800666

how to connect to v.92 MODEM and the MODEM which does not support V.42bis

Because MODEM chips only support V.90protocol, when connecting MODEMs with V.92, it may not be able to dial to V.92MODEM, but V.92MODEM can dial to V.90 MODEM. Users can write an original script and add “AT&H4 OK” in the line to adjust the mode to V.32bis multimode and MODEM may dial to V.92MODEM now. If the MODEM is unable to dial other older version MODEM, users may adjust the mode as well. In addition, if the MODEM on the other end does not support V.42 bis compression protocol, users may add “AT%C0 OK” in the script line to close compression funtion. Network mode and Command types are as follows:

AT Command

Network mode

AT Command

Flow control

AT&H0

V.92 multimode

AT&K0

Bi-directional no flow control

AT&H1

V.90/V.34

AT&K2

CTS flow control (Default)

AT&H2

V.34 multimode

AT&K3

RTS/CTS flow control

AT&H3

V.34 only

AT&K4

Bi-directional soft flow control

AT&H4

V.32bis multimode

ATCommand

country

AT&H5

V.32bis only

AT*Y162K=86

china

AT&H6

V.22bis

AT*Y162K=1

Americacanada

AT&H7

V.22

AT Command

Adjust speed (V90)

AT&H8

Bell 212

AT&L4

32000bps

AT&H9

Bell 103

AT&L13

44000bps

AT&H10

V.21

AT&L19

52000bps

AT&H12

V.23

AT&L22

56000bps

 

Example:

router_config#chat V92 ABORT ERROR "" AT OK ATE0S0=1 OK AT&C1&D2&S0&H4 OK

router_config#chat V92 ABORT ERROR "" AT OK ATE0S0=1 OK AT&C1&D2&S0&H4 OK

(script communicating with V92modem)

router_config#chat no_V42bis ABORT ERROR "" AT OK ATE0S0=1 OK AT&C1&D2&S0 OK AT%C0 OK

(script communicating with modem that does not support V42bis)

router_config#chat V92_no_V42bis ABORT ERROR "" AT OK ATE0S0=1 OK AT&C1&D2&S0&H4 OK AT%C0 OK

(script communicating with modems with the above situations)

router_config#line tty #

(# is the vty number of the modem, ranging from 1-64. Users may view this with show line)

router_config_line#script reset ###

(### is the script name configured for V92, no_V42bis and V92_no_v42bis)  

 

SOLVE THE PROBLEM THAT AM CARD CANNOT CONNECT WITH OTHER MODEM


<1>phenomena:LED CD doesn't shine.LED CD shine,but the port protocol isn't up.
means: add AT&H?(? is the number from 0 to 12,which means different network mode).First configure AM for V.90/v.34 mode(AT&H1),then AT&H2,AT&H3,AT&H4 and AT&H5.
<2>If the opponent MODEM doesn't support V.42bis compression protocol, you should close data compression fuction with adding AT%C0 to reset script.Then do as <1> until AM can connect with other modem.
<3>Becasue the highest protocol for 2 MODEM connection is V.34 ,we suggest you change reset script to "ABORT ERROR "" AT OK ATE0S0=1 OK AT&C1&D2&S0&H2 OK". 

configure logic interface

This part will introduce how to configure logic interface, include:

· configure null interface(null interface)

· configure loopback interface(loopback interface)

· configure dialer interface(dialer interface)

· configure Virtual template and Virtual access interfaces

· configure Multilink interface

· configure Tunnel interface

 

configure null interface

Software supports a null interface. It is like a null equipment applied to mass operation systems.  It will be in effect ,but will not transmit and receive data.

A only instruction “no ip unreachable” can be used on null interface. Null interface provide a optional way to filter communication, you can route a unexpected communication to null interface to avoid inordinate uses to visiting control listings.

You can appoint null interface through instructions below in "overall situation configuration" mode.

instruction

purpose

interface null 0

Enter “null interface configuration” mode

ip route 192.168.20.0 255.255.255.0 null 0

Null interface can be used as a parameter to any instruction used interface types. For an example: to configure a null interface to IP route “192.168.20.0”.

 ip route 192.168.20.0 255.255.255.0 null 0

 

configure loopback interface

Loopback interface is a logic interface, it will be in effect for always, and permit BGP session to run always even shutting off interface to out. You can use a loopback interface as a terminal address , that can be used to BGP sessions and etc. . 

When other router tries to access this loopback , you should configure a dynamic route protocol to spread route including loopback interface address.

Message routed to loopback interface is routed back again to router and disposed in local; and the message whose target ip-address is not ip-address of loopback will be deleted. That is to say that loopback interface is still used as a null interface.

To appoint a loopback interface , enter the mode " interface configuration" ,use following instructions in "overall situation configuration" mode.  

instrution

purpose

interface loopback number

Enter to loopback interface configuration mode

 

configure interface dialer

Interface dialer is a logic interface , it can configure public dial configurations of multiple physical interfaces to a virtual interface, to setup a relation between physical interfaces and a interface dialer to manage multiple interfaces at the same time.  

You can use following instructions to configure interface dialer:

instruction

purpose

interface dialer numbe

Enter interface dialer configuration mode

dialer rotary-group number

setup a relation between physical interfaces and a interface dialer

 

configure Virtual template and Virtual access

Virtual template and virtual access are used together. Virtual access is dynamic created depend on protocol need, its configuration information derives from configurations of virtual template . Virtual template and virtual access are often used in special conditions as protocol transition (PPP over X.25, Multilink PPP and etc.).

You can define Virtual template use following instruction:

 

instruction

purpose

Interface virtual-template number

Configure virtual template

 

configure Multilink interface

Mulitlink is a interface defined for Multilink PPP. This interface is usually used to serial interface Multilink PPP.

You can define multilink interface through following instructions:

instruction

purpose

Interface multilink number

Configure multilink interface

 

configure Tunnel interface

Tunnel interface is defined for some encapsulation protocols. Current version support GRE/IP  encapsulation protocol.  

You can input instructions below to enter the mode " interface configuration" to appoint a Tunnel interface in "overall situation configuration" mode.  

instruction

purpose

Interface Tunnel number

Configure Tunnel interface

 

examples of interface configurations

This part include:

l      an example of high speed interface configurations

l     an example of low speed interface configurations

l       an example of ethernet interface configurations

l      an example of DTU interface configurations

an example of high speed interface configurations

An example to introduce how to begin to configure on a serial interface. It appoint interface1/0 PPP ancapsulation.

interface serial 1/0

encapsulation ppp

an example of low speed interface configurations

An example to introduce how to change synchronization to asynchronism on low speed serial interface:

interface serial 1/0

physical-layer mode async

 

An example to introduce how to change asynchronism to synchronization on low speed serial interface:

interface serial 1/0

physical-layer mode sync

or

interface serial 1/0

no physical-layer mode

an typical example of asychronism serial interface configuration:

interface serial 1/0

(note: if it is a 16 asynchronism card ,it is inter async 0/0)

physical-layer mode async

ip address 192.168.1.1 255.255.255.0

encapsualtion ppp

an typical example of synchronization serial interface configuration:

interface serial 1/0

physical-layer mode sync

ip address 192.168.1.2 255.255.255.0

no shutdown

an example Ethernet sub-interface configurations

     ROUTER A configurations:

int f0/0.1

  encapsulation dot1q 1

  ip address 192.168.20.11 255.255.255.0

  

ROUTER B configurations:

int f0/0.1

  encapsulation dot1q 2

  ip address 192.168.20.22 255.255.255.0

  

ROUTER C configurations:

int f0/0.1

  encapsulation dot1q 1

  ip address 192.168.20.33 255.255.255.0

  

ROUTER D configurations:

int f0/0.1

  encapsulation dot1q 2

  ip address 192.168.20.44 255.255.255.0

 

In such a configuration, A can only ping to C ;B can only ping to D.

an example of DTU interface configurations

an configuration on Router 2630: Router 2630 connects DDN through DTU interface.

  router_ config #interface bm2/0

  router_ config bm2/0#linemode nt                    //NT modedefault

  router_ config bm2/0#ratemode A                    //normal Rate modedefault

  router_ config bm2/0# physical-layer speed 64000      //interface speed 64k

  router_ config bm2/0# ip add 192.168.21.3 255.255.255.0