uses multiple methods to emulate IOS. For older images, we use and maintain Dynamips; one emulator committed to emulate some Cisco hardware. Dynamips can run unmodified IOS images. In the brand-new 1.4, over there is a way to operation a 2nd category the switches and also routers. These are classified together Routing and Switching virtual devices (or R+Svms) because that short. What room the differences? below are the significant differences:

IOS pictures are usually run in Dynamips however R+Svms space housed in a digital machine.IOS pictures are lower in cpu and also memory therefore you deserve to fit more of lock in one topology.R+Svms are all merchant Routing and also Switching photos that are bigger in size but can it is in imported into for real world network emulation.

You are watching: C2600-adventerprisek9-mz.124-25d.bin

Important Points#


Due to this platforms hitting end of Sale, end of Life, and also End of support status, the pictures are no longer easily accessible for download native Cisco’s assistance sections. Currently, the c7200 pictures are the only ones still accessible for download for those through a support contract.

IOS 15.x#

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

Should I usage a mainline and an innovation train image?#

You will discover the an innovation train pictures to save the newest features however it may likewise contain the most bugs. Us recommend Mainline over modern technology train if you room interested on security without the need of brand-new features.Please check out Cisco IOS Versions and also Naming for more information.

Minimum memory#

The minimum ram is the lot of memory needed for IOS to occupational at best capacity v most function configured and activated. From experience you have the right to usually usage a bit much less RAM just fine.

Recommended images#

We yes, really recommend utilizing the c3640, c3660, c3725, c3745 and c7200 IOS images provided below, they have proven to be the many stable in listed you usage the best amount that RAM and Idle-PC value.

Idle-PC value#

When Dynamips operation an IOS image, a solitary instance deserve to consume 100% the the processing time for a CPU core or thread. To remedy this, you can supply Dynamips with an Idle-PC value, come consume less CPU. This worth will vary between devices/images. To help automate the procedure of identify a precious Idle-PC value, you can use the Idle-PC finder button when importing a sustained IOS photo into


(Idle-PC values are not forced with virtual machines or docker containers. Lock only required for use by the Dynamips emulator)

C1700 Series#

1700s have actually 1 FastEthernet addressed port (C1700-MB-1ETH) on its motherboard, 2 subslots because that WICs (maximum that 2 Ethernet harbor or 4 serial ports), and no Network Module slots. Keep in mind that interfaces execute not usage a slot designation (e.g. “f0”)

IOS variation 12.4.25d (Mainline)#

File name: c1700-adventerprisek9-mz.124-25d.binMD5: 3ed8d56a8757771105a56070e4147716Minimum RAM: 128MBProposed idle-PC value: 0x80358a60

IOS version 12.4.15T14 (Technology train)File name: c1700-adventerprisek9-mz.124-15.T14.binMD5: 351190de8764263e85a2b50718f394fdMinimum RAM: 160MBProposed idle-PC value: 0x824a4dc4

C2600 Series#

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

IOS variation 12.4.25d (Mainline)#

File name: c2600-adventerprisek9-mz.124-25d.binMD5: 8eca1f6fe57dfb3c3cf3568c0e475853Minimum RAM: 128MBProposed idle-PC value: 0x80519c48

IOS variation 12.4.15T14 (Technology train)#

File name: c2600-adventerprisek9-mz.124-15.T14.binMD5: 12b8548b23e2ec593652ae9310ac797fMinimum RAM: 256MBProposed idle-PC value: 0x8027ec88


The c3620 supports as much as 2 Network Modules (maximum of 8 Ethernet ports, 32 FastEthernet harbor or 8 serial ports). Note that tt shouldn’t be used because the latest easily accessible IOS picture is very old.

IOS version 12.2.26c#

File name: c3620-a3jk8s-mz.122-26c.binMD5: dd34b958ad362ef54ba48b187f4c97b4Minimum RAM: 64MBProposed idle-PC value: 0x603a8bac


The c3640 supports approximately 4 Network Modules (maximum that 16 Ethernet ports, 32 FastEthernet port or 16 serial ports).

IOS variation 12.4.25d (Mainline)#

File name: c3640-a3js-mz.124-25d.binMD5: db9f63ca1b46d18fb835496bfffe608aMinimum RAM: 128MBProposed idle-PC value: 0x6050b114


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

IOS variation 12.4.25d (Mainline)#

File name: c3660-a3jk9s-mz.124-25d.binMD5: 4ac7e947f13c189d746149dc74992890Minimum RAM: 192MBProposed idle-PC value: 0x606071f8

IOS variation 12.4.15T14 (Technology train)#

File name: c3660-a3jk9s-mz.124-15.T14.binMD5: 39950b7a563aa08e94a168260409f1e6Minimum RAM: 256MBProposed idle-PC value: 0x6076e0b4


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

IOS variation 12.4.25d (Mainline)#

File name: c2691-adventerprisek9-mz.124-25d.binMD5: a8e1f5821d87456595488d6221ce42e5Minimum RAM: 192MBProposed idle-PC value: 0x60a48cb8

IOS variation 12.4.15T14 (Technology train)#

File name: c2691-adventerprisek9-mz.124-15.T14.binMD5: 91388104d7276ad09204e36d2dfcf52dMinimum RAM: 256MBProposed idle-PC value: 0x60bcf9f8


The c3725 has 2 FastEthernet interfaces ~ above its motherboard (GT96100-FE), 3 subslots because that WICs (maximum that 6 serial ports) and also 2 Network Module slots (maximum the 32 FastEthernet port or 8 serial ports).

IOS variation 12.4.25d (Mainline)#

File name: c3725-adventerprisek9-mz.24-25d.binMD5: ac3d313d3caff5beeee244b81d2c024cMinimum RAM: 128MBProposed idle-PC value: 0x602467a4

IOS variation 12.4.15T14 (Technology train)#

File name: c3725-adventerprisek9-mz.124-15.T14.binMD5: 42baf17af10d9a1471bf542f0bfd07c7Minimum RAM: 256MBProposed idle-PC value: 0x60c09aa0


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

IOS variation 12.4.25d (Mainline)#

File name: c3745-adventerprisek9-mz.124-25d.binMD5: 563797308a3036337c3dee9b4ab54649Minimum RAM: 256MBProposed idle-PC value: 0x60aa1da0

IOS version 12.4.15T14 (Technology train)#

File name: c3745-adventerprisek9-mz.124-15.T14.binMD5: a696619869a972ec3a27742d38031b6aMinimum RAM: 256 RAMProposed idle-PC value: 0x602701e4


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

IOS 15 (Mainline)#

This router collection is still getting new IOS 15.x versions.The critical one at this day is:File name: c7200-adventerprisek9-mz.152-4.M8.binMinimum RAM: 512MB

IOS 12.4.25g (Mainline)#

MD5: 3a78cb61831b3ef1530f7402f5986556File name: c7200-a3jk9s-mz.124-25g.binMinimum RAM: 256MB

IOS 12.4.24T5 (Technology train)#

This one is not the latest 12.4 version but it is simpler to find.MD5: 3c4148f62acf56602ce3b371ebae60c9File name: c7200-adventerprisek9-mz.124-24.T5Minimum RAM: 256MBProposed idle-PC value: 0x606df838

Cisco Catalyst Switches#

Dynamips is incapable of to run IOS pictures from Catalyst Switches, as it’s can not to emulate the ASICs provided in those form of devices.

For switching, you deserve to use one IOU L2 binary image, or an IOSvL2 online disk photo with Qemu.

However, if you want to usage Dynamips you deserve to use the EtherSwitch module v 2600s, 3600s and 3700s Series. Save in mind the this module works in different ways (it offers the vlan database etc.) and does NOT assistance the following features:

Access Switch machine Manager (SDM) TemplateACL – improved Merging AlgorithmARP OptimizationBGP boosted Support the Numbered as-path accessibility Lists to 500BGP Restart Neighbor conference After max-prefix limit ReachedBGP Route-Map proceed Support because that Outbound PolicyClear Counters every PortDHCP SnoopingDHCP Snooping CountersDiagnostics alternatives on bootupErrDisable Reactivation per PortErrDisable timeoutEtherChannel – functional PAgPEtherchannel GuardFallback BridgingFlex link Bi-directional fast ConvergenceFlex attach VLAN Load-BalancingFlex Links interface PreemptionGOLD – Generic online DiagnosticsIEEE 802.1ab, attach Layer discovery ProtocolIEEE 802.1s – Multiple spanning Tree (MST) conventional ComplianceIEEE 802.1s VLAN Multiple spanning TreesIEEE 802.1tIEEE 802.1W covering Tree rapid ReconfigurationIEEE 802.1x – Auth failure OpenIEEE 802.1x – Auth fail VLANIEEE 802.1x – VLAN AssignmentIEEE 802.1x – wake up on LAN SupportIEEE 802.1X Multi-Domain AuthenticationIEEE 802.1x RADIUS AccountingIEEE 802.1x with Port SecurityIEEE 802.3ad link Aggregation (LACP)IEEE 802.3af power over EthernetIGMP rapid LeaveIGMP variation 1IGRPIP phone Detection EnhancementsIP Phone enhancement – PHY Loop DetectionIPSG (IP source Guard)Jumbo FramesL2PT – layer 2 Protocol TunnelingMAC Authentication BypassMLD SnoopingMulticast Etherchannel fill BalancingNAC – L2 IEEE 802.1xNAC – L2 IPNAC – L2 IP through Auth failure OpenPacket-Based Storm ControlPer harbor Per VLAN PolicingPort SecurityPort defense on private VLAN PortsPrivate VLANsQoS policy Propagation via Border Gateway Protocol (QPPB)Rapid-Per-VLAN-Spanning Tree (Rapid-PVST)Reduced MAC address UsageRemote expectations (RSPAN)Smart PortSpanning Tree Protocol (STP) – Loop GuardSpanning Tree Protocol (STP) – PortFast BPDU FilteringSpanning Tree Protocol (STP) – Portfast assistance for TrunksSpanning Tree Protocol (STP) – source GuardSpanning Tree Protocol (STP) – Uplink pack BalancingSRR (Shaped round Robin)Standby Supervisor port UsageSTP Syslog MessagesSwitching Database Manager (SDM)Trunk FailoverTrusted border (extended trust for CDP devices)Unicast Mac FilteringUniDirectional attach Detection (UDLD)VLAN accessibility Control perform (VACL)VLAN conscious Port SecurityWeighted Tail drop (WTD)Routing and also Switching Virtual equipments from Vendors

To recap: You deserve to import numerous images using Virtualbox or VMWare. ASIC based models choose the Cisco Catalyst switches are difficult to import together a Routing and also Switching image.

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If girlfriend require much more switching features, that is recommended to use larger Virtual device Switches and Routers (like the ones native VIRL) that run inside your choice of Qemu, Virtualbox or VMWare. For progressed switching IOSv and/or IOU is recommended.