- Product Overview
The Cisco 1941 Router, modular router, is designed for branch offices.
Figure 1 shows the front view of Cisco Router 1941/K9.
Table 1 shows the Quick Specs of the CISCO1941/K9.
2 integrated 10/100/1000 Ethernet ports: GE0/0&GE0/1
2 enhanced High-Speed WAN Interface Card slots
1 Internal Services Module slot
512 MB (installed) / 2.5 GB (max)
256 MB (installed) / 8 GB (max)
34.3 cm x 29.2 cm x 8.9 cm
Figure 2 shows the statue LEDs, on the front panel of the 1941/K9, including three statues: SYS, ACT and PoE.
Table 2 shows the front panel LEDs area description.
Solid green indicates normal operation.
System is booting or is in ROM monitor mode.
Power is off or system board is faulty.
Solid or blinking when any packets are transmitted or received on any WAN or LAN, or when monitoring system activity.
PoE is available.
Power supply is not supplying PoE power.
Figure 3 shows the back panel of this router with LEDs.
Kensington security slot
EN (Enable USB console)
EN (Enable RJ-45 console)
ISM or WLAN
Table 3 shows the back panel LEDs area description.
Flash memory is busy.
Initialized with error.
Blinking Green then turns off
CompactFlash is ready for removal.
Flash memory is busy.
Initialized with error.
Blinking Green then turns off
CompactFlash is ready for removal.
1 blink + pause
GE port operating at 10 Mb/s.
2 blink + pause
GE port operating at 100 Mb/s.
3 blink + pause
GE port operating at 1000 Mb/s.
GE link is established.
No GE link is established.
EN (RJ-45 console port)
The RJ-45 console port is active.
EN (USB serial console port)
The USB console port is active.
Figure 4 shows the ports and slots on the back panel of Cisco 1941/K9.
Compact flash 2
HWIC slot 1
HWIC slot 2
Input power connector
USB serial port
Compact flash 1
·Cisco 1941/K9 supports 2 integrated EHWIC slots for flexible configurations. It supports two modules: 1 double wide HWIC-D or single wide EHWIC/HWIC module or a 2nd single wide E-HIC/HWIC module.
·2 high-speed USB 2.0 ports enable another mechanism secure token capabilities and storage.
·The 1941 has 2 external Compact Flash slots supporting to extend up to 8GB.
Figure 5 shows the internal view of the Cisco 1941.
There is a blank Memory slot inside the device, supporting to extend memory.
The Cisco 1941 provides significantly enhanced modular capabilities offering investment protection for customers.
Table 4 shows interfaces and modules for this router.
Internal Services Module (ISM) with Services Ready Engine
256MB to 1GB Compact Flash Upgrade for Cisco 1900,2900,3900
256MB to 2GB Compact Flash Upgrade for Cisco 1900,2900,3900
256MB to 512MB CF Upgrade for Cisco 1900,2900,3900 ISR
256MB to 4GB Compact Flash Upgrade for Cisco 1900,2900,3900
Cisco 1900, 2900, 3900 Router EHWIC WAN Card EHWIC-1GE-SFP-CU
Four port 10/100/1000 Base-TX Gigabit Ethernet switch interface card for Cisco 1900 2900 3900 Routers
HWIC two routed port Cisco Router High-Speed WAN Interface card
1-Port Serial WAN Interface Card Cisco Router High-Speed WAN Interface card
2-Port Serial WAN Interface Card Cisco Router High-Speed WAN Interface card
Cisco Voice/WAN Card VWIC3-1MFT-T1/E1
Cisco Voice/WAN Card VWIC3-2MFT-T1/E1
Cisco Voice&WAN T1/E1 interface moudle VWIC3-1MFT-G703
Cisco Voice/WAN Card VWIC3-2MFT-G703
The Cisco 1941/K9 router supports IOS Technology Package Licenses.
Table 5 shows the models of these licenses.
Cisco 1900 IOS License L-SL-19-DATA-K9= Data E-Delivery PAK for Cisco 1900
Security License for Cisco 1900
AppX License with; DATA and WAAS for Cisco 1900 Series
Compare to Similar Routers
Table 6 shows the comparison between Cisco 1921 router and 1941 router.
512 MB (installed) / 512 MB (max)
512 MB (installed) / 2 GB (max)
256 MB (installed) / 256 MB (max)
256 MB (installed) / 8 GB (max)
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Cisco 1941 Router details Manufacturer Cisco Systems, Inc Manufacturer Part Number CISCO1941/K9 Product Type Router Form Factor External - modular - 2U Dimensions (WxDxH) 34.3 cm x 29.2 cm x 8.9 cm Weight 5.8 kg DRAM Memory 512 MB (installed) / 2 GB (max) Flash Memory 256 MB (installed) / 8 GB (max) Routing Protocol OSPF, IS-IS, BGP, EIGRP, DVMRP, PIM-SM, IGMPv3, GRE, PIM-SSM, static IPv4 routing, static IPv6 routing Data Link Protocol Ethernet, Fast Ethernet, Gigabit Ethernet Network / Transport Protocol IPSec Remote Management Protocol SNMP, RMON Features Cisco IOS IP Base , firewall protection, VPN support, MPLS support, Syslog support, IPv6 support, Class-Based Weighted Fair Queuing (CBWFQ), Weighted Random Early Detection (WRED) Compliant Standards IEEE 802.3ah, IEEE 802.1ah, IEEE 802.1ag Power AC 120/230 V ( 50/60 Hz
Cisco 1941 Router Specification
Services and Slot Density
Embedded hardware-based crypto acceleration (IPSec + SSL)
Total Onboard LAN 10/100/1000
Double-Wide SM Slots
Double-Wide EHWIC slots (use of a double-wide EHWIC slot will consume two EHWIC slots)
1 (0 on the Cisco 1941W)
Memory (DDR2 Error Correction Code [ECC] ECC DRAM) - Default
Memory (DDR2 ECC DRAM) - Maximum
Compact Flash (external) - Default
slot 0: 256 MB
slot 1: none
Compact Flash (external) - Maximum
slot 0: 4 GB
slot 1: 4 GB
External USB flash memory slots (Type A)
USB Console Port (Type B) (up to 115.2 kbps)
Serial Console Port (up to 115.2 kbps)
Serial Auxiliary Port (up to 115.2 kbps
Power Supply Options
Redundant Power Supply Support
AC Input Voltage
100-240 V ~
AC Input Frequency
AC Input Current range AC Power Supply (Max) (Amps)
AC Input Surge Current
Typical Power (No Modules)
Maximum Power capacity with AC power supply
Maximum Power capacity with PoE power supply (platform only)
Maximum PoE device power capacity with PoE power supply
Dimensions (H x W x D)
3.5 in x 13.5 in x 11.5 in
Rack-mount 19in. (48.3 cm) EIA
Wall-mount (refer to installation guide for approved orientation)
Weight-with AC power supply (no modules)
Weight-with POE power supply (no modules)
Maximum Weight-Fully Configured
Front to Side
Temperature-5906 feet (1800 m) max. altitude
Temperature-9843 feet (3000 m) max. altitude
3000 m (10000 ft)
10 to 85% RH
Acoustic: Sound Pressure (Typ/Max)
Acoustic: Sound Power (Typ/Max)
-40 - 70 oC (-40 - 158 oF)
5 to 95%RH
4570m (15000 ft)
CAN/CSA C22.2 No. 60950-1
47 CFR, Part 15
ICES-003 Class A
EN55022 Class A
CISPR22 Class A
AS/NZS 3548 Class A
EN 61000 (Immunity)
EN 55024, CISPR 24
ITU-T G.823, G.824
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Customer Reviews 13 item(s)
Tanzania customs need COC file. They can do and save me lots trouble.
- pick up address
I live in Hongkong. For small order, I always go to their warehouse and pick up cargo by myself. Very big warehouse and really huge inventory.
Free CCIE team support always helped me a lot. With their support, I won a small school ICT project!
In their 15th anniversary, I ordered cisco1941/k9 and won a T-shirt. I love it.
- Upgradable RAM
This 1941 can offer us a blank RAM slot. We can expand our RAM easily.
The DRAM is only 512 MB. I must upgrade it. It costs me more.
- small office router
Most popular router. My company just have 10 person, cisco1941/k9 is perfect choice
- cisco 1941 K9
It\'s no doubt that Cisco 1941 k9 is one of the best Cisco device. Easy to configure and pretty price! Wonderful!
- Quick delivery
I am in Africa. I paid and got device within 5 days. So fast delivery!
solid Cisco router, very well built. Expandable to do almost everything you could want it to. Cisco 1941, easy to upgrade.
- Nice product
good product, fast delivery
- cisco 1941/k9
Be Solid, reliable and simple to use. This cisco router owns 2 EHWIC slots,256MB CF,512MB DRAM,IP Base and none have failed me yet so far!
- THATS REALLY GOOD
It was a very good bussines .I recoment this seller because is better than others making offer about this type ios equipement
Product FAQ (CISCO1941/K9)
Q: Which CISCO router is suitable as gateway router for medium size organization of about 80 client computers connected to the internet?
A: Cisco1900 Series Router is OK.
Q: 1941/K9 that I would wish to make to support for VPN?
A: That depends, if you want to setup IPSec VPN, you would need SL-19-SEC-K9 or l-sl-19-sec-k9 license; if you want to use SSL VPN, you should buy a fl-sslvpn**-k9, the number depends on your SSL users.
Q: I am looking at the pictures of Cisco1941-k9, but on the back of the router, I don't see a Fiber input from my ISP Provider and Fiber output for my switch.Well, this is what I am going to get from my ISP. They will provide me a dedicated internet connection with a Fiber cable into my office. And it will be Internet only or data only. So, input in router will be Fiber and output from router should also be Fiber to my switch.
Q: I bought a 1941W but i bought it with just IPBASE license and now in need of the securityk9 and SSL VPN for it. I just want to confirm that what Im purchasing is for an IOS with payload encryption. I’m just looking for SSL for upto 10 users.
A: SL-19-SEC-K9 & FL-SSLVPN10-K9 are either needed.
Q: In site to site VPN, we know both end IP address, we assigned set peer cmd. If the interface are configured with DHCP(ISP), we don't know the interface IP address. At this scenario, how to configure site to site vpn. In remote VPN, how to configure remote VPN in cisco router. How to provide IP address dynamically to client host.
A: Don't know if it can be used with a single site-to-site VPN, but DMVPN can use NHRP to support non-hub with dynamic tunnel IPs. The client is configured with a hub's IP, and it uses NHRP to register its public IP with the hub. The hub then "knows" the remote IP. (NB: it also supports the remote IP being changed.)
Q: What is the basic setup required to configure 3 ISPs on a router interface?
A: I would say that these are the basic steps for setting up 3 ISP on a single router. - decide which interface will be for which ISP. - obtain IP addressing information from each ISP. - configure appropriate IP address and subnet mask on each of the ISP interfaces. - configure address translation for each of the 3 ISP interfaces. - determine what approach you will use for routing. Will it be static routes or some dynamic routing protocol, or some mix of these? - implement the appropriate routing solution for each of the ISP.
Q: We are receiving low internet upload speed (6-8Mps) at our office location. The download speed is good (50Mbps).
Got in contact with the ISP Comcast and tried testing it bypassing our internal n/w i.e. connecting my laptop directly to Cienna (Comcast GW) and both speeds were around 50Mbps. Testing the same through my router the speed goes down. Just the Upload speed. Could there be a configuration in our router thats causing this? FYI on the internet interface the settings are 'Duplex full 'Speed auto
A: Clear the counters and change the speed and duplex to auto/auto.
Q: We are looking to put Cisco routers into some client sites. Was looking at 1841's but they are end of life now I believe, can someone recommend an alternative / or it's replacement?
A: The 1941 is the successor to the 1841. However, new devices are faster, so you might be able to "downsize". For example, an 1841 is rated at 75 Kpps while a 890 is rated at 100 Kpps. Conversely, many new WAN circuits provide much more bandwidth then we usually obtained via TDM. If using such, you might need the faster successor or even a faster device.
In other words, you may want to re-examine your needs rather then just using a successor platform becuase it's the successor platform.
Q: I have bought new 1941 router and i have installed a new EHWIC-4ESG card to it, but unfortunately it is not being detected.
Please suggest, i have tried with all the supported ios images. But still it is not working.
A: What IOS are you using? You need a minimum of 15.1(2)T.
Q. If I purchased a Cisco ISR G2 router on Cisco IOS Software Release 15.0(1) M before the limitation was imposed, what should I do? And should I need to upgrade my Cisco IOS Software?
A: Assuming that you already have purchased the securityk9 package for encryption, you must purchase a HSEC-K9 license as a spare.
Q.Why do I need to purchase the SEC-K9 license as a spare?
A. If you purchase a Cisco ISR G2 chassis and later decide to turn on security features, you must buy a SEC-K9 license. The administrator must download the license to the router and follow the license installation instructions that come with the license to be able to use the security features on the router.
Q. On the Cisco ISR G2 routers with the SEC-K9 license, what tunnel count and performance throughput are available?
A. The SEC-K9 permanent licenses apply to the Cisco 1900, 2900, and 3900 ISR G2 platforms; these licenses limit all encrypted tunnel counts to 225 tunnels maximum for IP Security (IPsec), Secure Sockets Layer VPN (SSL VPN), a secure time-division multiplexing (TDM) gateway, and secure Cisco Unified Border Element (CUBE) and 1000 tunnels for Transport Layer Security (TLS) sessions. The SEC-K9 license limits encrypted throughput to less than or equal to 85-Mbps unidirectional traffic in or out of the ISR G2 router, with a bidirectional total of 170 Mbps. This requirement applies for the Cisco 1900, 2900, and 3900 ISR G2 platforms.
Q. What countries are classified license-free zones?
A. Countries belonging to the EU license-free zone include Australia, Austria, Belgium, Bulgaria, Canada, Cypress, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Japan, Latvia, Lithuania, Luxembourg, Malta, Netherlands, New Zealand, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom, and the United States.