C8140-G2 – 2x1GE Combo WAN – 2x Flex + 6x LAN – 5.6 Gbps Fanless Router
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C8140-G2 Description
The C8140-G2 gives the 8100 Series its largest routing-only faceplate: two 1GE RJ-45/SFP combo WAN ports, two Flex ports and six LAN ports, ten gigabit positions in a fanless 3.57 lb chassis. Forwarding is 5.6 Gbps, triple the entry models, with 1.5 Gbps of IPsec. Cisco marks it SD-WAN Capable No and publishes no SD-WAN or Threat Protection figure, and it holds the lower table tier at 280K IPv4 routes and 1K VRFs. There is no cellular bay. A 66W external supply powers it at 20W typical draw, and the minimum release is Cisco IOS XE 17.18.1.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
C8140-G2 |
|
Platform type |
Fanless small-branch router |
|
WAN Ports |
2x 1GE RJ-45/SFP combo |
|
Flex Ports |
2 x GE RJ-45 |
|
LAN Ports |
6x 1GE RJ-45 |
|
Cellular |
None on this platform |
|
SD-WAN Capable |
No |
|
External power supply |
66W external power supply |
|
Typical power |
20W |
|
Forwarding throughput |
5.6 Gbps at 512 bytes |
|
IPv4 routes |
280K |
|
Chassis weight |
3.57 lb |
|
Minimum software release |
Cisco IOS XE 17.18.1 |
Product Performance
Key Features
Six LAN ports plus two Flex and two combo WAN positions match the port count of the SD-WAN capable C8151-G2, so a site can have the larger faceplate without buying fabric capability it will not use.
At 5.6 Gbps this router forwards three times what C8130-G2 and the DSL models manage, which is what lets a ten-port site actually use its ports rather than being bounded at 1.9 Gbps.
Both WAN ports are RJ-45/SFP combo, so a dual-circuit site can take copper on one and fibre on the other, or two of either, without a media decision at purchase.
Typical draw is 20W, below the 23W of the DSL models and the 23W of C8151-G2, despite carrying more usable ports than either.
Route capacity stays at 280K with 1K VRFs; Cisco ties the higher 500K tier to SD-WAN capability rather than to port count, so a ten-port routed site still plans against the smaller table.
The chassis measures 1.09 x 6.9 x 12.7 in and weighs 3.57 lb, a different footprint from the 1.09 x 7.8 x 10.8 in body the six-port models share, which matters for a shelf or panel already cut to size.
Application Scenarios
Deployed where six LAN ports serve printers, phones and desktops directly, avoiding a separate access switch at the site.
Installed where two independent circuits land on the combo WAN ports, one copper and one fibre, under classic routing rather than an overlay.
Placed where the circuit exceeds what a 1.9 Gbps model can carry but the site does not join an SD-WAN fabric.
Product Comparison
|
Parameter |
C8140-G2 | ||
|---|---|---|---|
|
SD-WAN Capable |
No |
Yes |
No |
|
WAN Ports |
2x 1GE RJ-45/SFP combo |
2x 1GE RJ-45/SFP combo |
1x 1GE RJ-45, 1x 1GE RJ-45/SFP combo |
|
LAN Ports |
6x 1GE RJ-45 |
6x 1GE RJ-45 |
2x 1GE RJ-45 |
|
Cellular |
None on this platform |
Optional pluggable module, LTE or 5G |
None on this platform |
|
Forwarding throughput |
5.6 Gbps |
5.6 Gbps |
1.9 Gbps |
|
SD-WAN throughput |
Not listed for this model |
900 Mbps |
Not listed for this model |
|
IPv4 routes |
280K |
500K |
280K |
|
VRFs |
1K |
4K |
1K |
|
External power supply |
66W |
66W |
30W/66W |
|
Typical power |
20W |
23W |
16W |
|
Dimensions (H x D x W) |
1.09 x 6.9 x 12.7 in |
1.57 x 8.5 x 12.7 in |
1.09 x 7.8 x 10.8 in |
|
Chassis weight |
3.57 lb |
5.1 lb |
3.5 lb |
|
Minimum software release |
Cisco IOS XE 17.18.1 |
Cisco IOS XE 17.18.1 |
Cisco IOS XE 17.18.1 |
- C8140-G2 and C8151-G2 present the same ten gigabit positions and the same 5.6 Gbps forwarding, and Cisco separates them on capability and hardware extras: SD-WAN Capable No against Yes, no cellular bay against an LTE or 5G pluggable slot, and the 280K route tier against 500K.
- The physical cost of that step is real. C8151-G2 is 5.1 lb in a 1.57 x 8.5 x 12.7 in body drawing 23W, against 3.57 lb in a 1.09 x 6.9 x 12.7 in body drawing 20W here, so a shelf or panel sized for this model will not necessarily hold the larger one.
- Against C8130-G2 the gain is throughput and ports rather than capability. Both are routing-only on the same 17.18.1 train with the same 280K table, but this model triples forwarding and adds four LAN positions for 4W more typical draw.
- For deciding which SKU to order, confirm fabric participation and cellular backup together, since both live only in C8151-G2; if neither is needed, the choice between this model and C8130-G2 comes down to whether the site has more than four wired devices or a circuit above 1.9 Gbps.
Selection Guide
1. Ten Ports Without The Fabric Premium
C8151-G2 matches this router’s port count and 5.6 Gbps forwarding but adds SD-WAN capability, a cellular bay and the 500K table in a 5.1 lb body; a routed site with no fabric plan gets the same connectivity here at 3.57 lb and 20W.
2. Where Four Ports Stop Being Enough
C8130-G2 offers two Flex and two LAN positions against the two and six here; a site with more than four wired devices either adds a switch or moves to this model, and the 5.6 Gbps forwarding tier comes with it either way.
3. Cellular Backup Is Not Available At Any Configuration
Cisco supports the LTE and 5G pluggables only on C8151-G2 and C8161-G2; a site needing wireless backup cannot reach it from this SKU regardless of accessory choice, so the requirement decides the model rather than the order lines.
4. Two Hundred Eighty Thousand Routes At Ten Ports
Table scale follows SD-WAN capability rather than port count, so this model carries the same 280K routes and 1K VRFs as the six-port entry router; a segmented design with many VRFs needs the SD-WAN capable tier even when its port count fits here.
5. A Different Footprint From The Six-Port Bodies
At 1.09 x 6.9 x 12.7 in this chassis is shallower and wider than the 1.09 x 7.8 x 10.8 in six-port models; a site standardising a shelf cut-out or panel across the series has to allow for both shapes rather than one.
Ordering Checklist
|
Check Item |
What to Confirm |
Why It Matters |
|---|---|---|
|
SD-WAN participation |
Confirm the site will not be managed as a Cisco Catalyst SD-WAN endpoint. |
Cisco marks this model SD-WAN Capable No; a fabric site needs C8151-G2. |
|
Cellular requirement |
Confirm no LTE or 5G backup path is required. |
The pluggable modules are supported only on C8151-G2 and C8161-G2, so this model cannot take one. |
|
Route table sizing |
Confirm the routing table stays inside 280K IPv4 routes and 1K VRFs. |
Table scale follows SD-WAN capability rather than port count on this platform. |
|
Combo port media |
Confirm whether each combo WAN port will use copper or an SFP optic, and order optics accordingly. |
Both cages accept either and an optic is a separate line item per port. |
|
Chassis footprint |
Confirm the mounting position allows for a 1.09 x 6.9 x 12.7 in body. |
This is a different shape from the six-port 8100 models and a shared cut-out may not fit. |
|
Software image floor |
Confirm the image is Cisco IOS XE 17.18.1 or later. |
Staging below the floor leaves the router unsupported after installation. |
|
Mounting hardware |
Confirm which of rackmount, desktop, under-desk or DIN-rail mounting the site uses and that the accessory is on the order. |
Each mounting position needs its own hardware. |
Optional Add-ons
|
Add-on |
Description |
|---|---|
|
66W external power supply |
The external supply listed for this model. |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | C8140-G2 | Series | Cisco 8100 Series Secure Routers |
| Platform type | Fanless small-branch router | WAN Ports | 2x 1GE RJ-45/SFP combo |
| Flex Ports | 2 x GE RJ-45 | LAN Ports | 6x 1GE RJ-45 |
| Cellular | None on this platform | Expansion Slots | None; the 8100 Series has no NIM or SM bay |
| Management port | 1 x RJ-45 console | Storage interface | 1 x USB Type C 3.0 for out-of-band management |
| External power supply | 66W external power supply | Typical power | 20W |
| SD-WAN Capable | No | Forwarding (512B) | 5.6 Gbps |
| IPsec (512B) | 1.5 Gbps | SD-WAN (512B) | Not listed for this model |
| Threat Protection (EMIX) | Not listed for this model | IPv4 routes | 280K |
| IPv6 routes | 260K | IPv4 ACLs | 2K |
| IPv4 ACEs | 5K | NAT sessions | 100K |
| VRFs | 1K | IPsec tunnels | 250 |
| Dimensions (H x D x W) | 1.09 x 6.9 x 12.7 in | Chassis weight | 3.57 lb |
| Operating temperature | 0 to 40 degrees C at sea level, with 1 degree C of derating per 1000 feet above sea level | Non-operating temperature | -40 to 70 degrees C |
| Operating humidity | 5 to 85 percent relative humidity, noncondensing | Operating altitude | 0 to 10,000 feet (0 to 3048 m) |
| Non-operating altitude | 0 to 15,000 feet (0 to 4572 m) | MTBF | Greater than 100,000 hours |
| Mounting options | Rackmount, desktop, under desk, DIN-rail or wall mount | Minimum device OS | Cisco IOS XE 17.18.1 |
| Minimum SD-WAN Manager release | Cisco Catalyst SD-WAN Release 20.18.1 |
Get More Information
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Quality Certifications
Customer Reviews
Questions & Answers
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What is the practical difference between C8140-G2 and C8151-G2?
-
Are all ten C8140-G2 interfaces dedicated LAN ports?
-
Does C8140-G2 offer more IPsec throughput than C8130-G2?
-
Which power adapter is specified for C8140-G2?
-
Can C8140-G2 be installed in a quiet office?
-
How many routes and VPN tunnels can C8140-G2 support?
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