Example Cisco IOS versions and idlepc values for GNS3

IOS_versions_and_idlepc.txt

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.

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).

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
mods (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 Dynamips/GNS3.
This is due to the impossibility to emulate ASIC processors used in those type of devices.
However, 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
Diagnotics 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