C8140-G2 – 2x1GE Combo WAN – 2x Flex + 6x LAN – 5.6 Gbps Fanless Router

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C8140-G2 Description

The C8140-G2 is a Cisco 8100 Series Secure Router for fanless small-branch sites with many wired devices. The router has two 1GE RJ-45/SFP combo WAN ports, two Flex ports and six LAN ports, with 5.6 Gbps of forwarding, 1.5 Gbps of IPsec across 250 tunnels and a 66W external supply. SD-WAN runs from Cisco IOS XE 26.2.1 at 900 Mbps, no Threat Protection throughput is published, and the chassis has no cellular option or NIM and SM bay.

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

Yes (from IOS XE 26.2.1)

External power supply

66W external power supply

Typical power consumption

20W

Forwarding throughput

5.6 Gbps at 512 bytes

IPv4 routes

280K

Weight

3.57 lb

Minimum software release

Cisco IOS XE 17.18.1

Product Performance

Forwarding Throughput
IPsec Throughput
IPv4 Route Capacity

Key Features

Ten Gigabit Positions

Two combo WAN ports, two Flex ports and six LAN ports give ten 1GE positions on one chassis. Eight are RJ-45 and two are RJ-45/SFP combo.

5.6 Gbps Forwarding

Forwarding is 5.6 Gbps at 512 bytes, with 1.5 Gbps of IPsec and 250 IPsec tunnels. A multi-gigabit internet circuit can be routed without the chassis becoming the limit.

Two Combo WAN Cages

Each WAN port accepts either an RJ-45 cable or an SFP, so the media for each circuit is decided at install time.

SD-WAN From Cisco IOS XE 26.2.1

Autonomous routing starts at Cisco IOS XE 17.18.1, and SD-WAN is supported from 26.2.1 at 900 Mbps. No Threat Protection throughput is published.

280K Routes And 1K VRFs

The base 8100 scale tier applies: 280K IPv4 routes, 260K IPv6 routes, 2K ACLs, 5K ACEs and 100K NAT sessions.

Compact Fanless Body

The chassis measures 1.09 x 6.9 x 12.7 in and weighs 3.57 lb, drawing 20W typical from a 66W external supply. Mounting options are rack, desktop, under desk, DIN-rail or wall.

Application Scenarios

Small Office With Local Devices

A small office connects printers, phones and desktops directly to the six LAN ports, with the two Flex ports available for further local devices.

Dual-Circuit Branch Edge

A branch with two internet circuits lands one on each RJ-45/SFP combo WAN port, using copper for one and fibre for the other, and routes between them at up to 5.6 Gbps.

High-Speed Circuit In A Fanless Site

Where a fast internet circuit terminates in an occupied room, the fanless chassis forwards 5.6 Gbps of 512-byte traffic without fan noise.

Product Comparison

Parameter

C8140-G2

C8151-G2

C8130-G2

LAN ports

6x 1GE RJ-45

6x 1GE RJ-45

2x 1GE RJ-45

Cellular

Not applicable

Optional pluggable module, LTE or 5G

Not applicable

Forwarding (512B)

5.6 Gbps

5.6 Gbps

1.9 Gbps

SD-WAN capable

Yes (from IOS XE 26.2.1)

Yes

Yes (from IOS XE 26.2.1)

Threat protection (EMIX)

Not published

1 Gbps

Not published

Number of IPv4 routes

280K

500K

280K

Number of VRFs

1K

4K

1K

Typical power consumption

20W

23W

16W

Weight

3.57 lb

5.1 lb

3.5 lb

C8140-G2 and C8130-G2 share the 280K IPv4 route and 1K VRF tier and both reach SD-WAN only from Cisco IOS XE 26.2.1, but C8140-G2 forwards 5.6 Gbps against 1.9 Gbps and has six LAN ports against two, at 20W of typical draw against 16W. A branch that needs more than two LAN ports or a circuit above 1.9 Gbps therefore needs this model. A site that needs SD-WAN before 26.2.1, 1 Gbps of Threat Protection, 500K routes with 4K VRFs, or an optional pluggable LTE or 5G module moves to C8151-G2, which keeps the 5.6 Gbps of forwarding in a 5.1 lb body against 3.57 lb and draws 23W.

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
Product 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 consumption 20W
SD-WAN capable Yes (from IOS XE 26.2.1) Forwarding (512B) 5.6 Gbps
IPsec (512B) 1.5 Gbps SD-WAN (512B) 900 Mbps
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 W x D) 1.09 x 6.9 x 12.7 in Weight 3.57 lb
Operating temperature 0 to 40°C at sea level, with 1 degree C of derating per 1000 feet above sea level Storage temperature -40 to 70°C
Operating humidity 5 to 85 percent relative humidity, noncondensing Operating altitude 0 to 10,000 feet (0 to 3048 m)
Storage altitude 0 to 15,000 feet (0 to 4572 m) MTBF Greater than 100,000 hours
Mounting Rackmount, desktop, under desk, DIN-rail or wall mount Minimum software release Cisco IOS XE 17.18.1
Minimum SD-WAN manager release Cisco Catalyst SD-WAN Release 26.2.1 SD-WAN measurement basis IPsec, Quality of Service, deep packet inspection and Flexible NetFlow enabled

Quality Certifications

Customer Reviews

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    Rachel W.
    Posted on 05/08/2026
    Verified Buyer
    5.0

    no issues with the router

    Alan J.
    Posted on 14/07/2026
    Verified Buyer
    5.0

    good layout, easy to find things

    Javier K.
    Posted on 10/02/2026
    Verified Buyer
    5.0

    config loaded fine, well under what we were quoted elsewhere

Questions & Answers

  • What IPsec throughput is C8140-G2 rated for?

    C8140-G2 provides 5.6 Gbps of forwarding throughput and 1.5 Gbps of IPsec throughput, both measured with 512-byte packets. SD-WAN throughput is 900 Mbps with IPsec, QoS, deep packet inspection and Flexible NetFlow enabled, and no Threat Protection throughput is listed for this model.
  • Which external AC adapter is the default order configuration for C8140-G2?

    The Cisco 8000 Series ordering guide lists the default power supply as the AC adapter PWR-CC1-66WAC. The data sheet rates the external supply at 66W, and typical draw is 20W, so the default adapter covers the router at normal load.
  • From which release is platform-based licensing supported on C8140-G2?

    Platform-based licensing was introduced for C8140-G2 in Cisco IOS XE 17.18.1a, per the Cisco 8000 Series licensing guide. In autonomous mode the router then runs Cisco Routing OS Essentials or Cisco Routing Advantage (LIC-ROS-S-A).
  • Which license tags does C8140-G2 use in SD-WAN controller mode?

    In SD-WAN controller mode C8140-G2 takes Cisco WAN Essentials (LIC-CSWAN-S-E) or Cisco WAN Advantage (LIC-CSWAN-S-A), per the Cisco 8000 Series licensing guide. The Routing OS Essentials entitlement used in autonomous mode is not listed for controller mode.
  • Which mounting kit PIDs are listed for C8140-G2?

    Per the Cisco 8000 Series ordering guide, C8140-G2 has three mounting options: the rack mount kit C8140-G2-RM-19=, the DIN rail kit ACS-1111-DRM= and the under desk kit ACS-1100-UDM=. Desktop and wall placement need no kit.

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DataSheet Downloads

  • C8140-G2 Datasheet