GNS3: Cisco Idle-PC dan Image

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https://docs.gns3.com/1-kBrTplBltp9P3P-AigoMzlDO-ISyL1h3bYpOl5Q8mQ/#h.q3c4j9ddnh1n

GNS3 offers multiple ways to emulate IOS. For older images, we use and maintain Dynamips; an emulator dedicated to emulate some Cisco hardware. Dynamips can run unmodified IOS images. In the new GNS3 1.4, there is a way to run a second category of switches and routers. These are classified as Routing and Switching virtual machines (or R+Svms) for short. What are the differences? Here are the major differences:

   IOS images are usually run in Dynamips however R+Svms are housed in a virtual machine.
   IOS images are lower in cpu and memory so you can fit more of them in one topology.
   R+Svms are all vendor Routing and Switching images that are larger in size but can be imported into GNS3 for real world network emulation.

Important points

  • IOS 15.x
  • Should I use a mainline and technology train image?
  • Minimum memory
  • Recommended images
  • Idle-PC value

c1700 series

  • IOS version 12.4.25d (Mainline)
  • IOS version 12.4.15T14 (Technology train)

c2600 series

  • IOS version 12.4.25d (Mainline)
  • IOS version 12.4.15T14 (Technology train)

c3620

  • IOS version 12.2.26c

c3640

  • IOS version 12.4.25d (Mainline)

c3660

  • IOS version 12.4.25d (Mainline)
  • IOS version 12.4.15T14 (Technology train)

c2691

  • IOS version 12.4.25d (Mainline)
  • IOS version 12.4.15T14 (Technology train)

c3725

  • IOS version 12.4.25d (Mainline)
  • IOS version 12.4.15T14 (Technology train)

c3745

  • IOS version 12.4.25d (Mainline)
  • IOS version 12.4.15T14 (Technology train)

c7200 series

  • IOS 15 (Mainline)
  • IOS 12.4.25g (Mainline)
  • IOS 12.4.24T5 (Technology train)

Cisco Catalyst Switches

Important points Availability

Due to these platforms hitting End of Sale, End of Life, and End of Support status, the images are no longer available for download from Cisco’s support sections. Currently, the c7200 images are the only ones still available for download for those with a support contract.

IOS 15.x

Only the c7200 series get newer IOS 15 images. All other platforms are now end-of-life and only support IOS 12.4. Please note that the IOSv appliance is based on IOS 15 and there are IOU (IOS on UNIX) images with IOS 15.

Should I use a mainline and technology train image?

You will find the technology train images to contain the newest features but it may also contain the most bugs. We recommend Mainline over Technology train if you are interested on stability without the need of new features.Please see Cisco IOS Versions and Naming for more information.

Minimum memory

The minimum RAM is the amount of memory needed for IOS to work at maximum capacity with most feature configured and activated. From experience you can usually use a bit less RAM just fine.

Recommended images

We really recommend using c3640, c3660, c3725, c3745 and c7200 IOS images listed below, they have proven to be the most stable in GNS3 provided you use the right amount of RAM and Idle-PC value.

Idle-PC value

This settings will help Dynamips to consume less CPU. It’s specific to each different IOS image.


c1700 series

1700s have 1 FastEthernet fixed port (C1700-MB-1ETH) on its motherboard, 2 subslots for WICs (maximum of 2 Ethernet ports or 4 serial ports), and no Network Module slots. Note that interfaces do not use a slot designation (e.g. “f0”)

IOS version 12.4.25d (Mainline)
File name: c1700-adventerprisek9-mz.124-25d.bin
MD5: 3ed8d56a8757771105a56070e4147716
Minimum RAM: 128MB
Proposed idle-PC value: 0x80358a60
IOS version 12.4.15T14 (Technology train)
File name: c1700-adventerprisek9-mz.124-15.T14.bin
MD5: 351190de8764263e85a2b50718f394fd
Minimum RAM: 160MB
Proposed idle-PC value: 0x824a4dc4

c2600 series

2600s have one or two Ethernet or FastEthernet interfaces on its motherboard, 3 subslots for WICs (maximum of 6 serial ports) and 1 Network Module slot (maximum of 4 Ethernet ports or 16 FastEthernet ports).

IOS version 12.4.25d (Mainline)
File name: c2600-adventerprisek9-mz.124-25d.bin
MD5: 8eca1f6fe57dfb3c3cf3568c0e475853
Minimum RAM: 128MB
Proposed idle-PC value: 0x80519c48
IOS version 12.4.15T14 (Technology train)
File name: c2600-adventerprisek9-mz.124-15.T14.bin
MD5: 12b8548b23e2ec593652ae9310ac797f
Minimum RAM: 256MB
Proposed idle-PC value: 0x8027ec88

c3620

The c3620 supports up to 2 Network Modules (maximum of 8 Ethernet ports, 32 FastEthernet ports or 8 serial ports). Note that tt shouldn’t be used since the latest available IOS image is very old.

IOS version 12.2.26c
File name: c3620-a3jk8s-mz.122-26c.bin
MD5: dd34b958ad362ef54ba48b187f4c97b4
Minimum RAM: 64MB
Proposed idle-PC value: 0x603a8bac

c3640

The c3640 supports up to 4 Network Modules (maximum of 16 Ethernet ports, 32 FastEthernet ports or 16 serial ports).

IOS version 12.4.25d (Mainline)
File name: c3640-a3js-mz.124-25d.bin
MD5: db9f63ca1b46d18fb835496bfffe608a
Minimum RAM: 128MB
Proposed idle-PC value: 0x6050b114

c3660

The c3660 has 2 FastEthernet fixed ports (Leopard-2FE) and supports up to 6 Network Modules (maximum of 24 Ethernet ports, 32 FastEthernet ports or 24 serial ports).

IOS version 12.4.25d (Mainline)
File name: c3660-a3jk9s-mz.124-25d.bin
MD5: 4ac7e947f13c189d746149dc74992890
Minimum RAM: 192MB
Proposed idle-PC value: 0x606071f8
IOS version 12.4.15T14 (Technology train)
File name: c3660-a3jk9s-mz.124-15.T14.bin
MD5: 39950b7a563aa08e94a168260409f1e6
Minimum RAM: 256MB
Proposed idle-PC value: 0x6076e0b4

c2691

The c2691 has 2 FastEthernet interfaces its motherboard (GT96100-FE), 3 subslots for WICs (maximum of 6 serial ports) and 1 Network Module slot (maximum of 16 FastEthernet ports or 4 serial ports).

IOS version 12.4.25d (Mainline)
File name: c2691-adventerprisek9-mz.124-25d.bin
MD5: a8e1f5821d87456595488d6221ce42e5
Minimum RAM: 192MB
Proposed idle-PC value: 0x60a48cb8
IOS version 12.4.15T14 (Technology train)
File name: c2691-adventerprisek9-mz.124-15.T14.bin
MD5: 91388104d7276ad09204e36d2dfcf52d
Minimum RAM: 256MB
Proposed idle-PC value: 0x60bcf9f8

c3725

The c3725 has 2 FastEthernet interfaces on its motherboard (GT96100-FE), 3 subslots for WICs (maximum of 6 serial ports) and 2 Network Module slots (maximum of 32 FastEthernet ports or 8 serial ports).

IOS version 12.4.25d (Mainline)
File name: c3725-adventerprisek9-mz.124-25d.bin
MD5: ac3d313d3caff5beeee244b81d2c024c
Minimum RAM: 128MB
Proposed idle-PC value: 0x602467a4
IOS version 12.4.15T14 (Technology train)
File name: c3725-adventerprisek9-mz.124-15.T14.bin
MD5: 42baf17af10d9a1471bf542f0bfd07c7
Minimum RAM: 256MB
Proposed idle-PC value: 0x60c09aa0

c3745

The c3745 has 2 FastEthernet interfaces on its motherboard (GT96100-FE), 3 subslots for WICs (maximum of 6 serial ports) and 4 Network Module slots (maximum of 32 FastEthernet ports or 16 serial ports).

IOS version 12.4.25d (Mainline)
File name: c3745-adventerprisek9-mz.124-25d.bin
MD5: 563797308a3036337c3dee9b4ab54649
Minimum RAM: 256MB
Proposed idle-PC value: 0x60aa1da0
IOS version 12.4.15T14 (Technology train)
File name: c3745-adventerprisek9-mz.124-15.T14.bin
MD5: a696619869a972ec3a27742d38031b6a
Minimum RAM: 256 RAM
Proposed idle-PC value: 0x602701e4

c7200 series

7200s have a different architecture. Only the 7206 is supported, it has 6 Port Adapters (PA) slots. VXR chassis, NPE-400 and C7200-IO-FE are the default settings in GNS3.

IOS 15 (Mainline)
This router series is still getting new IOS 15.x versions.
The last one at this date is:
File name: c7200-adventerprisek9-mz.152-4.M7.bin
Minimum RAM: 512MB
IOS 12.4.25g (Mainline)
MD5: 3a78cb61831b3ef1530f7402f5986556
File name: c7200-a3jk9s-mz.124-25g.bin
Minimum RAM: 256MB
IOS 12.4.24T5 (Technology train)
This one is not the latest 12.4 version but it is easier to find.
MD5: 3c4148f62acf56602ce3b371ebae60c9
File name: c7200-adventerprisek9-mz.124-24.T5
Minimum RAM: 256MB
Proposed idle-PC value: 0x606df838

Cisco Catalyst Switches

At this moment, it is not possible to emulate Catalyst switches with Dynamip. This is due to the impossibility to emulate ASIC processors used in those type of devices. For switching you can use IOU L2 image or vIOS L2 images with Qemu.

However, if you want to use Dynamips you can use the EtherSwitch module with 2600s, 3600s and 3700s Series. Keep in mind that this module works differently (uses the vlan database etc.) and doesn’t support the following features:

   Access Switch Device Manager (SDM) Template
   ACL – Improved Merging Algorithm
   ARP Optimization
   BGP Increased Support of Numbered as-path Access Lists to 500
   BGP Restart Neighbor Session After max-prefix Limit Reached
   BGP Route-Map Continue Support for Outbound Policy
   Clear Counters Per Port
   DHCP Snooping
   DHCP Snooping Counters
   Diagnostics Options on bootup
   ErrDisable Reactivation Per Port
   ErrDisable timeout
   EtherChannel – Flexible PAgP
   Etherchannel Guard
   Fallback Bridging
   Flex Link Bi-directional Fast Convergence
   Flex Link VLAN Load-Balancing
   Flex Links Interface Preemption
   GOLD – Generic Online Diagnostics
   IEEE 802.1ab, Link Layer Discovery Protocol
   IEEE 802.1s – Multiple Spanning Tree (MST) Standard Compliance
   IEEE 802.1s VLAN Multiple Spanning Trees
   IEEE 802.1t
   IEEE 802.1W Spanning Tree Rapid Reconfiguration
   IEEE 802.1x – Auth Fail Open
   IEEE 802.1x – Auth Fail VLAN
   IEEE 802.1x – VLAN Assignment
   IEEE 802.1x – Wake on LAN Support
   IEEE 802.1X Multi-Domain Authentication
   IEEE 802.1x RADIUS Accounting
   IEEE 802.1x with Port Security
   IEEE 802.3ad Link Aggregation (LACP)
   IEEE 802.3af Power over Ethernet
   IGMP Fast Leave
   IGMP Version 1
   IGRP
   IP Phone Detection Enhancements
   IP Phone Enhancement – PHY Loop Detection
   IPSG (IP Source Guard)
   Jumbo Frames
   L2PT – Layer 2 Protocol Tunneling
   MAC Authentication Bypass
   MLD Snooping
   Multicast Etherchannel Load Balancing
   NAC – L2 IEEE 802.1x
   NAC – L2 IP
   NAC – L2 IP with Auth Fail Open
   Packet-Based Storm Control
   Per Port Per VLAN Policing
   Port Security
   Port Security on Private VLAN Ports
   Private VLANs
   QoS Policy Propagation via Border Gateway Protocol (QPPB)
   Rapid-Per-VLAN-Spanning Tree (Rapid-PVST)
   Reduced MAC Address Usage
   Remote SPAN (RSPAN)
   Smart Port
   Spanning Tree Protocol (STP) – Loop Guard
   Spanning Tree Protocol (STP) – PortFast BPDU Filtering
   Spanning Tree Protocol (STP) – Portfast Support for Trunks
   Spanning Tree Protocol (STP) – Root Guard
   Spanning Tree Protocol (STP) – Uplink Load Balancing
   SRR (Shaped Round Robin)
   Standby Supervisor Port Usage
   STP Syslog Messages
   Switching Database Manager (SDM)
   Trunk Failover
   Trusted boundary (extended trust for CDP devices)
   Unicast Mac Filtering
   UniDirectional Link Detection (UDLD)
   VLAN Access Control List (VACL)
   VLAN Aware Port Security
   Weighted Tail Drop (WTD)
   Routing and Switching Virtual machines from Vendors

To recap: You can import many images using Virtualbox or VMWare. ASIC based models like the Cisco Catalyst switches are impossible to import as a Routing and Switching Image.

If you require more switching features, it is recommended to use larger Virtual Machine Switches and Routers that run inside your choice of Qemu, Virtualbox or VMWare. For advanced switching IOSv and/or IOU is recommended.



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