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Using GNS3 simulator

that's easy... reboot the pc. the sessions are being used and it can't bind sometimes...

edit: just tested 2 1721 with WIC-1T no issues..

Grr.. Been playing with it with little success. I got two WIC-1Ts (one on each 2691) to bind once. For some reason it won't bind again.

I'll try removing all settings, reboot, retry.

reply to Da Geek Kid
Alright, I think I figured it out.

I gotta make the links before starting the routers. I was able to link the WIC-1Ts back to back again.

Thanks

reply to Da Geek Kid
Alright, another silly question, perhaps.

I'm trying to simulate frame relay between two 2691s and a frame relay switch. From the studying I've done and the toying around with the two 1721s I have with a WIC-1T on each, the interface type is determined by the serial cable installed. You can set the "frame intf-type" to dce or dte all you want, but the interface will only provide clocking if the cable says it's a DCE and it won't if the cable says it's a DTE.

Unless I'm missing something, the serial interfaces on both 2691s in the simulator are coming up as DCEs and naturally, I can't get them to "talk."

You know where to change this?

huh????

you set up couple of routers and connect them to the virtual FR... I have never had any issues doing this... Have you read the GNS3 docs???

This is what I've configured thus far. Maybe I need to read the GNS docs.

I know a frame relay switch provides the clocking "in real life" but I can't seem to change the serial interfaces to DTEs.

Diagram of network in GNS

R1#sh run
Building configuration...
 
Current configuration : 797 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef
!
!
!
!
no ip domain lookup
frame-relay switching
!
!
!
!
!
!
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/0
 ip address 30.1.1.1 255.255.255.252
 encapsulation frame-relay
 clock rate 8000000
 frame-relay map ip 30.1.1.2 200 IETF
 frame-relay interface-dlci 100
 frame-relay intf-type dce
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
!
no ip http server
no ip http secure-server
!
!
!
control-plane
!
!
!
line con 0
 exec-timeout 0 0
 logging synchronous
line aux 0
line vty 0 4
!
!
end
 

R2#sh run
Building configuration...
 
Current configuration : 796 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef
!
!
!
!
no ip domain lookup
frame-relay switching
!
!
!
!
!
!
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/0
 ip address 30.1.1.2 255.255.255.252
 encapsulation frame-relay
 clock rate 800000
 frame-relay map ip 30.1.1.1 100 IETF
 frame-relay interface-dlci 200
 frame-relay intf-type dce
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
!
no ip http server
no ip http secure-server
!
!
!
control-plane
!
!
!
line con 0
 exec-timeout 0 0
 logging synchronous
line aux 0
line vty 0 4
!
!
end
 
 

PVC Statistics for interface Serial0/0 (Frame Relay DCE)
 
              Active     Inactive      Deleted       Static
  Local          0            2            0            0
  Switched       0            0            0            0
  Unused         0            0            0            0
 
DLCI = 100, DLCI USAGE = LOCAL, PVC STATUS = INACTIVE, INTERFACE = Serial0/0
 
  input pkts 0             output pkts 0            in bytes 0
  out bytes 0              dropped pkts 0           in pkts dropped 0
  out pkts dropped 0                out bytes dropped 0
  in FECN pkts 0           in BECN pkts 0           out FECN pkts 0
  out BECN pkts 0          in DE pkts 0             out DE pkts 0
  out bcast pkts 0         out bcast bytes 0
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
  pvc create time 00:09:14, last time pvc status changed 00:05:25
 
DLCI = 200, DLCI USAGE = LOCAL, PVC STATUS = INACTIVE, INTERFACE = Serial0/0
 
  input pkts 0             output pkts 0            in bytes 0
  out bytes 0              dropped pkts 0           in pkts dropped 0
  out pkts dropped 0                out bytes dropped 0
  in FECN pkts 0           in BECN pkts 0           out FECN pkts 0
  out BECN pkts 0          in DE pkts 0             out DE pkts 0
  out bcast pkts 0         out bcast bytes 0
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
  pvc create time 00:06:32, last time pvc status changed 00:05:26
 

Interface Serial0/0
Hardware is GT96K
DCE 530, clock rate 8000000
idb at 0x627E4CE8, driver data structure at 0x627EC404
wic_info 0x627ECA00
 

reply to Network Guy
well... Here's your answer in the GNS3 docs:

* Why my serial connection works though the interfaces are both DCE?

GNS3/Dynamips doesn't emulate the physical layer which is why the serial connections work even though they are both DCE.

reply to Da Geek Kid

reply to aryoba

reply to Network Guy
ok So you need to study up on your frame and here's a link below to help you out..

»www.cisco.com/en/US/tech/tk713/t···a7.shtml

obviously, neither of the R1 and R2 are frame switches so I am not sure why you have frame switching anyways... there's nothing wrong with configuring FRs on GNS3... I'll let you RTFM more...

I used "frame-relay switching" to enable that. I knew it would be the wrong config to do "frame-relay switching" on both routers, but with nothing else to configure on the simulated frame switch in the simulator, and not being able to change the serial interfaces to DTEs on both routers so I can use the simulated frame switch, I knew it wouldn't work anyway.

I've read up on frame switching, I know what it's supposed to do. I've made it work with the 1721s I have sitting at home back to back.

Soooo you said that you tested 1721s via WIC-1Ts in the simulator and it worked. Any insights as to how? I'm curious because I have the IOS for 1721s. The IOS that I use on the actual, physical 1721s via WIC-1Ts at home is the same IOS I'm using in the simulator.

reply to Network Guy
R1

 
interface Serial0
 no ip address
 encapsulation frame-relay
!
interface Serial0.1 point-to-point
 ip address 30.1.1.1 255.255.255.252
 snmp trap link-status
 frame-relay interface-dlci 102
 

interface Serial0
 no ip address
 encapsulation frame-relay
!
interface Serial0.1 point-to-point
 ip address 30.1.1.2 255.255.255.252
 snmp trap link-status
 frame-relay interface-dlci 201
 

Got it to work using subinterfaces.

Thanks for your help

you can use it without sub interfaces as well... use your intuitive techniques (i.e. debug command) to find out the line item missing in your config...

The purpose here is to learn not to tell ya how it's done... GNS3 just works. it has bugs and so does the IOS...

Yeah, I seriously need to get into the habit of using the debug functions instead of googling possible working configs that might work. I still don't know what went wrong, but I'm gonna break it again like before and peruse through the messages.

reply to Network Guy
In defense of GNS3 it can save a lot of money on a CCIE level lab just by interfacing some hardware with some soft routers via a NIO and a actual switch.

I'm starting to hate this simulator. It's as stable as the stock market. Grr

I'm gonna look up the recommended machine specs to use this, but I'm using an Intel Duo 2 GHz with 2 GB of RAM. It should be sufficient.

Your machine does need to be beefy... I have a quad core with 8GB of RAM and can run 13-17 routers without a single issue for more than 5 days straight on a win7 64 bit... I do not see any problem with stability.