3Com Router User Manual

							Establish Configuration Environment17
Figure 8   Establish a dial-up connection via “HyperTerminal”
Figure 9   Dial on remote computer
4If a dial-up connection is established, then press Enter after the self-test to display 
the prompt “Username:” and “password:”. Enter the correct username and the 
password, then enter the system view of Router.
5Enter command to configure the router or view running status of the router. Enter 
? to get help when necessary. For details of specific commands, please refer to the 
following chapters.
Local/Remote Telnet 
Connection 
Configuration 
EnvironmentAfter the router powers on, and IP addresses of the interfaces have been properly 
configured on the router, you can use the Telnet client program to establish a 
connection with the router and log in the router via LAN or WAN. Then configure 
the router.
1As shown in the following two figures, connect the Ethernet port adapter on the 
computer with the Ethernet interface of the router. To establish a remote  
						

							18CHAPTER 2: 3COM ROUTER USER INTERFACE
configuration environment, connect the computer with the router via the WAN 
interface.
Figure 10   .Establish configuration environment of local telnet connection
Figure 11   Establish a configuration environment of a remote telnet connection 
2As shown in the following two figures (Telnet client program interface in Windows 
9X), run the Telnet client program on the computer and set its terminal emulation 
type as VT100.
Ethernet
Server
Workstation
Work station running
Telnet C lientLA N
E thernet E thernet
Workstation
Local w orkstation running
Telnet clientRouter
LA N
Remote router to be
configuredRemote LANWA N
Workstation
Workstation 
						

							Command Line Interface (CLI)19
Figure 12   Run a telnet program
Figure 13   Establish a telnet connection with router
The host name in the above figure is the name or IP address of a router interface 
of the remote connection.
3If connection is established, press Enter after the self-test to display the prompt 
“Username:” and “password:”. Enter the correct username and the password, 
then enter the system view of the router. If the prompt of 
Too many users! 
appears, try to connect later. Usually, there should be no more than five Telnet 
users at any one time.
4Enter the command to configure the router or view running status of the router. 
Enter ? to get help if necessary. For details of specific commands, please refer to 
the following chapters.
In router configuration via Telnet connection, the Telnet connection will be 
disabled if you change the IP address of the router interface. So please enter the 
new IP address of the router interface at the Telnet client prompt after any 
changes in address, so as to re-establish the connection.
Command Line 
Interface (CLI)The 3Com Router 1.x provides a series of configuration commands for the user to 
configure and manage network equipment via command line interface. The 
command line interface can accomplish the following:
■Perform local or remote configuration via the console port.
■Log in the router through modem dial-up with asynchronous serial port and 
perform remote configuration.
■Perform local or remote configuration via Telnet connection
■Provide terminal access service.
■Configure command hierarchical protection to reject the illegal users. 
						

							20CHAPTER 2: 3COM ROUTER USER INTERFACE
■Provide online help any time the user keys in “?”.
■Provide network test commands, such as tracert and ping, etc. to quickly 
diagnose whether the network is normal.
■Provide rich and detailed debugging information for diagnosis of network 
faults.
■Use telnet command to directly log in and manage other routers
■Support TFTP service, convenient for users to upload or download the 3Com 
Router main program files and configuration files.
■Provide FTP service, convenient for users to upload or download the 3Com 
Router main program files and configuration files.
■Provide function similar to DosKey to execute a history command.
■Searches the key word via command line interpreter with an incomplete match 
method. Interpretation will be available just by entering non-conflict key words. 
For example, enter abbreviated “
dis” for display command.
ViewView is the interface of the 3Com Router command. Different commands are 
implemented in different views, and different views are realized according to 
different function requirements. For example, the RIP view can configure 
corresponding commands.
The views in the 3Com Router are in a hierarchical structure. You can enter the 
function views in system view and the sub-function views in the function views. 
The following figure shows the view structure of the 3Com Router. 
						

							Command Line Interface (CLI)21
Figure 14   Hierarchical view structure of the 3Com Router
The following table gives some details of the functionality features of the 
command views as well as the commands for entering these views.
System viewTa b l e 4   Views and their prompts
System view
RIP view
OSPF view
BGP view 
Routing policy view
PIM view
Sync serial interface view
Ethernet  interface view
Async serial interface view
CE1 interface view
……
L2TP group view
IPSec proposal view
IPSec policy view
IKE proposal view
ACL view
X.25 hunt group view
Frame Relay switch view
Frame Relay class view
MFR interface view
DHCP address pool view
……
DLCI view
R2 CAS view
Voice viewVoice GK client view
Voice AAA view
Voice dial program view
Voice subscriber-line view
Voice access-number view
Voice entity view
View nameFunctionPromptEnter commandExit command
system viewConfigures the system 
parameters[Router]Directly enter the view 
upon the login of 
subscribersEnter logout to 
disconnect the 
connection with the 
Router
RIP viewConfigures the RIP 
parameters[Router-rip]Enter rip in system 
viewEnter quit to return 
to the system view
OSPF viewConfigures the OSPF 
parameters[Router-ospf]Enter ospf in system 
viewEnter quit to return 
to the system view
BGP viewConfigures the BGP 
parameters[Router-bgp]Enter bgp in system 
viewEnter quit to return 
to the system view
routing policy 
viewConfigures the routing 
policy parameters[Router-route-policy]Enter 
route-policy 
abc permit 1 or 
route-policy 
abc deny 1 in 
system viewEnter quit to return 
to the system view
PIM viewConfigures the 
multicast routing 
parameters[Router-pim]Enter pim in system 
viewEnter quit to return 
to the system view
sync serial 
interface viewConfigures the 
synchronous serial 
interface parameters[Router-Serial0]Enter interface 
serial 0 in any 
viewsEnter quit to return 
to the system view 
						

							22CHAPTER 2: 3COM ROUTER USER INTERFACE
async serial 
interface viewConfigures the 
asynchronous serial 
interface parameters[Router-Async0]Enter interface 
async 0 in any 
viewsEnter quit to return 
to the system view
AUX interface 
viewConfigures the AUX 
interface parameters[Router-Aux0]Enter interface 
aux 0 in any viewsEnter quit to return 
to the system view
AM interface 
viewConfigures the AM 
interface parameters[Router-AM0]Enter interface 
am 0 in any viewsEnter quit to return 
to the system view
Ethernet 
interface viewConfigures the Ethernet 
interface parameters[Router-Ethernet0]Enter interface 
ethernet 0 in any 
viewsEnter quit to return 
to the system view
loopback 
interface viewConfigures the 
loopback interface 
parameters[Router-LoopBack1]Enter interface 
loopback 0 in any 
viewsEnter quit to return 
to the system view
ISDN BRI 
interface viewConfigures the ISDN BRI 
interface parameters[Router-Bri0]Enter interface 
bri 0 in any viewsEnter quit to return 
to the system view
CE1 interface 
viewConfigures a time slot 
binding method on the 
CE1 interface and the 
physical layer 
parameters[Router-E1-0]Enter controller 
e1 0 in any viewsEnter quit to return 
to the system view
CT1 interface 
viewConfigures a time slot 
binding method on the 
CT1 interface and the 
physical layer 
parameters[Router-T1-0]Enter controller 
t1 0 in any viewsEnter quit to return 
to the system view
CE3 interface 
viewConfigures a time slot 
binding method on the 
CE3 interface and the 
physical layer 
parameters[Router-E3-0]Enter controller 
e3 0 in any viewsEnter quit to return 
to the system view
CT3 interface 
viewConfigures a time slot 
binding method on the 
CT3 interface and the 
physical layer 
parameters[Router-T3-0]Enter controller 
t3 0 in any viewsEnter quit to return 
to the system view
E1-F interface 
viewConfigures the physical 
layer parameters for the 
E1-F interface[Router-Serial0]Enter interface 
serial 0 in any 
viewsEnter quit to return 
to the system view
T1-F interface 
viewConfigures the physical 
layer parameters for the 
T1-F interface[Router-Serial0]Enter interface 
serial 0 in any 
viewsEnter quit to return 
to the system view
dialer interface 
viewConfigures the dialer 
interface parameters[Router-Dialer0]Enter interface 
dialer 0 in any 
viewsEnter quit to return 
to the system view
virtual 
template 
interface viewConfigures the virtual 
template parameters[Router-Virtual-Template1]Enter interface 
Virtual-Templat
e 1 in any viewsEnter quit to return 
to the system view
tunnel 
interface viewConfigures the tunnel 
interface parameters[Router-Tunnel0]Enter interface 
tunnel 0 in any 
viewsEnter quit to return 
to the system view
NULL interface 
viewConfigures the null 
interface parameters[Router-Null0]  Enter interface 
null 0 in any viewsEnter quit to return 
to the system view
logical channel 
view Configures the AUX 
interface parameters[Router-logic-channel1]Enter 
logic-channel 1 
in any viewsEnter quit to return 
to the system view
bridge 
template 
interface view Configures the virtual 
Ethernet interface 
parameters[Router-Bridge-Template1]Enter interface 
Bridge-Template 
0 in any viewsEnter quit to return 
to the system view
View name Function Prompt Enter command Exit command 
						

							Command Line Interface (CLI)23
The command line prompt character consists of the network device name (Router 
by default) and the command view name, such as [Router-rip].
The commands are divided according to view. In general, in a certain view, only 
the commands defined by the view can be executed, but some widely used 
commands (including 
ping, display, debugging, reset, save, interface, 
logic-channel, and controller) can be executed in all views
For some views listed in the above table, you must enable the corresponding 
functions before you can enter the views. To enter some other views, however, 
you should configure the related restriction conditions. For more information, see 
the related chapters in this manual.
In all views, you can use the quit command to return to the superior-level views, 
and the return command to the system view directly.
Command Line 
Online HelpThe command line interface of the 3Com Router provides the following online 
helps:
■Full help
■Partial help
X.25 hunt 
group viewConfigures the X.25 
hunt group parameters[Router-X25-huntgroup-abc]Enter x25 
hunt-group abc 
round-robin in 
system viewEnter quit to return 
to the system view
Frame Relay 
class viewConfigures the FR class 
parameters[Router-fr-class-abc]Enter fr class 
abc in system viewEnter quit to return 
to the system view
DLCI viewConfigures the DLCI 
parameters[Router-fr-dlci-100]Enter fr dlci 100 
in synchronous serial 
interface view. (The 
link layer protocol 
encapsulated on the 
interface should be 
FR.Enter quit to return 
to the synchronous 
serial interface view
Frame Relay 
switch viewConfigures the FR 
switch parameters[Router-fr-switch-abc]Enter fr switch 
abc in system viewEnter quit to return 
to the system view
MFR interface 
viewConfigures the MFR 
interface parameters[Router-MFR0]Enter interface 
mfr 0 in any viewsEnter quit to return 
to the system view
L2TP group 
viewConfigures L2TP group[Router-l2tp1]Enter l2tp-group 
1 in system viewEnter quit to return 
to the system view
IPSec proposal 
viewConfigures a security 
proposal[Router-ipsec-proposal-abc]Enter ipsec 
proposal abc in 
system viewEnter quit to return 
to the system view
IPSec policy 
viewConfigures a security 
policy[Router-ipsec-policy-abc-0]Enter ipsec 
policy abc 0 in 
system viewEnter quit to return 
to the system view
IKE proposal 
viewConfigures an IKE 
proposal[Router-ike-proposal-0]Enter ike 
proposal 0 in 
system viewEnter quit to return 
to the system view
ACL viewConfigures ACL rules[Router-acl-1]Enter acl 1 in 
system viewEnter quit to return 
to the system view
DHCP address 
pool viewConfigures a DHCP 
address pool[Router-dhcpabc]Enter dhcp server 
ip-pool abc in 
system viewEnter quit to return 
to the system view
View name Function Prompt Enter command Exit command 
						

							24CHAPTER 2: 3COM ROUTER USER INTERFACE
■The help information obtained via the above-mentioned online help is 
described as follows:
1Full help: Enter “?” in any view, all the commands in this view and their brief 
descriptions can be obtained.
[Router]?
aaa-enable Enable AAA(Authentication, Authorization and Accounting)
acl Specifystructure of access-list configure information
arp Add a ARP entry 
bgp Enable/disable BGP protocol 
bridge Bridge Set 
clock Set system clock 
copy Copy config or system file to remote tftp server 
configfile Select config file stored in flash or NVRAM 
controller Set a E1/T1 entry
......
2Partial help: Enter a command followed by “?” separated with the space key, and 
if parameters are available, descriptions of related parameters will be listed.
[Router]display ? 
    aaa           AAA information 
    aaa-client    Display the buffered voice information 
    acl           Display access-list information 
    arp           ARP table information 
    bgp           BGP protocol information 
    bridge        Remote bridge information 
......
3Partial help: Enter a character string followed by “?”, and descriptions of all the 
commands beginning with this character string will be listed.
[Router]di? 
    dialer    dialer-rule    display 
4Partial help: Enter a command and a character string, followed by “?”, and all the 
key words beginning with this character string will be listed.
For example:
[Router]display a? 
    aaa    aaa-client    acl    arp
Command Line Error 
MessageIn the 3Com Router, all the commands entered by users will be accurately 
executed if they pass the syntax check. Otherwise, users will be informed by an 
error message. The following table shows common error messages.
Ta b l e 5   List of common command line error messages
Common error 
message
Causes
Incorrect commandNo command has been found.
No key word has been found.
Wrong parameter type
Incomplete commandThe command input is incomplete.
Invalid parametersParameter value beyond limit
Too many parametersToo many parameters are input. 
						

							Command Line Interface (CLI)25
History CommandThe command line interface of the 3Com Router 1.x provides a function similar to 
DOSKey by automatically saving the history of commands inputted users. Users 
can check the history of commands saved in the command line to repeat 
execution. 10 history commands can be saved at the most for each user. The 
configuration steps are shown in the following two tables.
1Display history command
The following command can be used in all views to display the command recently 
input:
Ta b l e 6   Display history command
2Check history command
The following keys can be used in all views to check recent commands:
Ta b l e 7   Check history command
Edit Features of 
Command LineThe command line of the 3Com Router 1.x provides basic command edit functions 
and supports multi-line editing. The maximum length of each command is 256 
characters, as shown in the following table:
The following keys can be used in all views to edit commands:
Ta b l e 8   Edit function table
Display Features of 
Command LineThe command line interface of the 3Com Router 1.x provides the following display 
features:
Provide pause function when the information displayed exceeds one screen page, 
and three options are available for users.
OperationCommand
Display history commanddisplay history-command
OperationKeysResult
Go to the previous 
history commandCtrl+E (in Windows 
9x)If there are earlier inputted commands, fetch the 
previous one. Otherwise, the alarms rings.
Go to the next 
history commandCtrl+R (in Windows 
9x)If there are later inputted commands, fetch the 
next one. Otherwise, clear the commands and the 
alarms rings.
KeyFunction
Any key on boardIf the edit buffer is not full, insert the character at the cursor and 
move the cursor to the right. 
Backspace key: 
BackSpaceDelete the character to the left of the cursor and move the cursor 
back one character. If the cursor gets to the beginning of the 
command line, the alarm rings.
Delete key: DeleteDelete the character at the cursor and the alarm rings when the 
cursor gets to the end of the command line.
Left cursor key The cursor moves one character to the left, and the alarm rings when 
the cursor gets to the beginning of the command line.
Right cursor key The cursor moves one character to the right, and the alarm rings 
when the cursor gets to end of the command line. 
						

							26CHAPTER 2: 3COM ROUTER USER INTERFACE
Ta b l e 9   Display function table
User Identity 
ManagementThe 3Com Router sets three kinds of router management users: administrator 
user, operator user and guest user. Different kinds of users have different rights to 
execute commands.
1An administrator user has the right to execute all the commands of the router. 
Only the administrator user can configure all the functions and parameters and 
can enter all views.
2An operator user can monitor and maintain the router, they can also obtain the 
debugging information of the router. The operator user can only execute the 
following commands.
debugging Enable system debugging functions
display Display system running information
language Switch language mode (English)
logout logout
pad Try to open a PAD connection
ping Send ICMP ECHO_REQUEST packets to network hosts
reboot Reboot the router under certain condition
reset Reset operation
rlogin Log in remote UNIX host
send Send a message to other terminals
telnet  Telnet to a remote host
tracert Trace the route taken by packets to reach a network host
undo  Cancel current setting
3A guest user has no right to manage the router, but only has the right to perform 
a remote test on the router. The guest user can only execute the following 
commands.
language Switch language mode (English, Chinese) 
logout logout 
pad   Try to open a PAD connection 
ping    Send ICMP ECHO_REQUEST packets to network hosts 
rlogin  log in remote UNIX host. 
telnet Telnet to a remote host 
tracert Trace the route taken by packets to reach a network host
Please perform the following commands in system view.
Ta b l e 10   Configure the user
OperationCommands or keys
Stop display information on terminalPress Ctrl+C when display information pauses.
Continue to display information of next 
screen pagePress Space when display information pauses.
Continue to display information of next 
linePress Enter when display information pauses.
OperationCommand
Configure a userlocal-user user-name service-type type [ password { 
simple | cipher } password ]
Delete a userundo local-user user-name