readme

思科路由器仿真器,用来仿7200系列得,可以在电脑上模拟路由器

VTTY binding to real serial port device "<si_desc>":
----------------------------------------------------

   Format: <device>{:baudrate{:databits{:parity{:stopbits{:hwflow}}}}}}

   device: character device name, e.g. /dev/ttyS0
   baudrate: baudrate
   databits: number of databits.
   parity: data parity: N=none, O=odd, E=even, 
   stopbits: number of stop bits
   hwflow: hardware flow control (0=disable, 1=enable)

   Note that the device field is mandatory, however other fields are optional. 
   (dynamips will default to 9600, 8, N, 1, no hardware flow control)

   Note that access to the escape commands (described below) through a serial
   port are deliberately prevented, as the escape commands interfere with
   serial encapsulation protocols.


Escape commands
***************

You can press ^] (Ctrl + ]) at any time, followed by one of these characters:

o : Show the VM object list
d : Show the device list
r : Dump MIPS CPU registers
t : Dump MIPS TLB entries
m : Dump the latest memory accesses
s : Suspend CPU emulation
u : Resume CPU emulation
q : Quit the emulator
b : Dump the instruction block tree
h : JIT hash table statistics
l : MTS64 cache statistics
c : Write IOS configuration to disk (ios_cfg.txt)
j : Non-JIT mode statistics
i : Determine an idling pointer counter
x : Experimentations (can crash the box!)
^]: Send ^]

If you press an unrecognized key, help will be shown. 

Note: on Windows, it may be the "Ctrl + $" sequence.


Virtual Bridge
**************

The virtual bridge is used to emulate a shared network between emulator
instances.

Any emulator instance can act as a virtual bridge.

The configuration file (specified by the "-b" option) contains a list of
NetIO descriptors, with the following syntax:
 
   interface_name:netio_type[:netio_parameters]

Example:

# Connection to instance "I0"
I0:udp:10000:127.0.0.1:10001

# Connection to instance "I1"
I1:udp:10002:127.0.0.1:10003

# Connection to instance "I2"
I2:udp:10004:127.0.0.1:10005

The "I0" instance would be launched with the following parameters:

   dynamips ios.bin -p 1:PA-FE-TX -s 1:0:udp:10001:127.0.0.1:10000


Virtual Ethernet switch
***********************

The virtual ethernet switch is used to emulate an Ethernet network between
emulator instances. This switch supports access and trunk ports (802.1Q).
ISL will be available in a future release.

Any emulator instance can act as a virtual ethernet switch.

The configuration file (specified by the "-E" option) contains a list of
NetIO descriptors (representing interfaces) and a list of interface properties
(access/trunk port, VLAN info...)

The interface definition is similar to Port Adapters:

   IF:interface_name:netio_type[:netio_parameters]

1) Configuring an Access Port

syntax: ACCESS:interface_name:vlan_id

2) Configuration a 802.1Q Trunk Port

syntax: DOT1Q:interface_name:native_vlan

The native VLAN is not tagged. On Cisco devices, by default the native VLAN
is VLAN 1.

Example of configuration file:

IF:E0:udp:10000:127.0.0.1:10001
IF:E1:udp:10002:127.0.0.1:10003
IF:E2:gen_eth:eth0

DOT1Q:E0:1
ACCESS:E1:4
DOT1Q:E2:1


Virtual ATM switch
******************

The virtual ATM switch fabric is used to emulate an ATM backbone between 
emulator instances. The use of this virtual switch is not mandatory, you 
can directly connect emulator instances for point-to-point ATM connections.
Please note that only basic VP/VC switching is supported, there is no
support for ILMI/QSAAL/... or other specific ATM protocols.

Any emulator instance can act as a virtual ATM switch.

Example of configuration file (specified by the "-a" option):

# Virtual Interface List
IF:A0:udp:10001:127.0.0.1:10000
IF:A1:udp:10002:127.0.0.1:10003
IF:A2:udp:10004:127.0.0.1:10005

# VP connection between I0 and I1
VP:A0:10:A1:20
VP:A1:20:A0:10

# VP connection between I0 and I2
VP:A0:11:A2:30
VP:A2:30:A0:11

# VC connection between I1 and I2
VC:A1:5:2:A2:7:3
VC:A2:7:3:A1:5:2

In this example, we have 3 virtual interfaces, A0, A1 and A2. The syntax
for interface definition is similar to Port Adapters:

   IF:interface_name:netio_type[:netio_parameters]

You can do VP switching or VC switching:

1) VP switching

syntax: VP:input_if:input_vpi:output_if:output_vpi

2) VC switching

syntax: VC:input_if:input_vpi:input_vci:output_if:output_vpi:output_vci


Testing the Virtual ATM switch with one dynamips instance
*********************************************************
(Contribution of Mtv Europe)

Virtual ATM switch configuration file ("atm.cfg"):

IF:A0:udp:10003:127.0.0.1:10001
IF:A1:udp:10004:127.0.0.1:10002                                                
# a0/vpi=1/vci=100 connects to a1/vpi=2/vci=200
VC:A0:1:100:A1:2:200                                                           
VC:A1:2:200:A0:1:100

Invoking dynamips:

./dynamips -p 1:PA-A1 -s 1:0:udp:10001:127.0.0.1:10003 \
           -p 2:PA-A1 -s 2:0:udp:10002:127.0.0.1:10004 \
           -a atm.cfg IOS.BIN

(note input ports of IOS interfaces are output ports of ATM switch 
interfaces, and vice versa).

IOS configuration:

ip cef
ip vrf test
 rd 1:1
 route-target both 1:1
int a1/0
 no shut
int a1/0.2 p
 ip addr 1.1.1.1 255.255.255.0
 pvc 1/100
interface a2/0
 no shut
interface a2/0.2 p
 ip vrf forwarding test
 ip addr 1.1.1.2 255.255.255.0
 pvc 2/200
!

# ping 1.1.1.2
!!!!!


Virtual Frame-Relay switch
**************************

The virtual Frame-Relay switch fabric is used to emulate a Frame-Relay 
backbone between emulator instances. The use of this virtual switch is not 
mandatory, you can directly connect emulator instances with appropriate IOS
configuration.

Any emulator instance can act as a virtual Frame-Relay switch.

There is only a basic implementation of the LMI protocol (ANSI Annex D), which
is probably not conforming but works with Cisco IOS. Fortunately, Cisco IOS
is able to detect automatically the LMI protocol.

Example of configuration file (specified by the "-f" option):

# Virtual Interface List
IF:S0:udp:10001:127.0.0.1:10000
IF:S1:udp:10002:127.0.0.1:10003

# DLCI switching between S0 and S1
VC:S0:200:S1:100
VC:S1:100:S0:200

In this example, we have 2 virtual interfaces, S0 and S1. The syntax
for interface definition is similar to Port Adapters:

   IF:interface_name:netio_type[:netio_parameters]

DLCI switching syntax:

   VC:input_if:input_dlci:output_if:output_dlci

In the example above, the switch is configured to switch packets 
received on interface S0 with DLCI 200 to interface S1 with DLCI 100,
and vice-versa.

== EOF ==