VTY configuration Directory
D-Link Router use line command to set terminal parameters simply and neatly; such as width and height, configuration courses are adapted to users’ custom.
This chapter will introduce how to configure the VTY(virtual terminal )on the Router. Details about commands for configuring the VTY, please refer to “VTY configuration commands”.
D-Link
Router has four kinds of cables: console ,aux, asynchronous and virtual terminal
.The different routers have different numbers. User can refer to software and
hardware configuration references below to
properly configure equipment:
CABLE |
Interface |
description |
Rules
of line code |
CON(CTY) |
console |
use
to login the router to configure |
Code=
0 |
AUX |
assistant |
RS-232
DTE interface, an asynchronous interface to backup,can not be used as a
second console |
Code=65,if the slot number<=4, otherwise Code=”slot
number “multiple 16 +1 |
TTY |
asynchronism |
Asynchronous
interface, often used in the dial sessions of SLIP,PPP |
Incept number is 1. Serial number differs from different console.
Range is maximum asynchronism interfaces supported by a router.
For instance,there
are 16 asynchronism module on slot 1,null on slot 2,8 synchronization
module. So,a1/0 line 1,a1/15 is corresponding to line 16,s3/0
is corresponding to line 17,s3/7 is corresponding to line 24。 |
VTY |
Virtual-
asynchronism |
Use
to link to sync ports of routers, such as Telnet,X.25 PAD、HTTP and
Rlogin on Ethernet & serial interface |
64
numbers begins from maximum TTY cable number +1 |
relationship between line and intrface
l asynchronism interface and TTY line
l synchronization interface and VTY line
asynchronism
interface and TTY asynchronism interface are corresponding to physical
interminal line[TTY]. When
asynchronism interface does not enclapsulation protocols, it can be connected to
intermial.
synchronization interface and VTY line: Virtual interminal line provide accessing to a router by synchronization interface. VTY line is not corresponding to synchronization interface as TTY line to asynchronism interface. This is because VTY line is dynamic created on router,while TTY line is a static physical port. When a user try to link to router by VTY line, he is tring to connect a virtual interface. There are several virtual interfaces to each synchronization interface.
For example, several Telnet connect to one interface(Ethernet or serial interfaces).
You need to do following steps to configure VTY:
l
enter the configuration mode
l configure the terminal parameters
Refer to “Examples of VTY configuration” to know more about VTY configurations.
Users can use “show line”command to check the configuration of VTY.
The commands configure the line width and lines
of screen on terminal on tty1-tty10.If user login from this interface ,the
prompt “more” will appear every 40 lines, and a newline will be
displayed after 132 charaters;
config#line
tty 1 10
config_line#width
132
config_line#length
40
Configure s1/0 to TTY
interface:
config_s1/0#physical-layer
mode async
config_s1/0#async
mode interactive
Such a configuration use back to back cable to
connect s1/0 directly. If you want to telnet with modem, you should configure
line dial before you the command “async
mode interactive”.
The following configuration will cancel the VTY limitation to lines of each screen and will not prompt the “more”.
config#line
vty 0 63
config_line#length
0