C8131-G2 – 1x1GE WAN + 1x1GE Combo – 2x Flex + 2x LAN – SD-WAN Capable

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C8131-G2 Description

The C8131-G2 is a Cisco 8100 Series Secure Router for small branches that join an SD-WAN fabric from a fanless chassis. The router has six 1GE ports (one RJ-45 WAN, one RJ-45/SFP combo WAN, two Flex and two LAN), 1.9 Gbps of forwarding, 1.5 Gbps of IPsec across 250 tunnels, 900 Mbps of SD-WAN and 1 Gbps of Threat Protection. The 8100 Series chassis has no NIM or SM bay and this model has no cellular option, so every WAN path is Ethernet.

Quick Specs

Parameter

Specification

Product ID

C8131-G2

Platform type

Fanless small-branch router

WAN ports

1x 1GE RJ-45 and 1x 1GE RJ-45/SFP combo

Flex ports

2 x GE RJ-45

LAN ports

2x 1GE RJ-45

SD-WAN capable

Yes

SD-WAN throughput

900 Mbps at 512 bytes

Threat protection throughput

1 Gbps at EMIX

Forwarding throughput

1.9 Gbps at 512 bytes

IPv4 routes

500K

External power supply

30W/66W external power supply

Weight

3.5 lb

Minimum software release

Cisco IOS XE 26.1.1

Product Performance

Forwarding Throughput
SD-WAN Throughput
Threat Protection Throughput

Key Features

Fanless Six-Port Chassis

The body has no fan and measures 1.09 x 7.8 x 10.8 in at 3.5 lb. It mounts on a rack, desktop, under a desk, on DIN-rail or on a wall.

SD-WAN From Cisco IOS XE 26.1.1

The router runs 900 Mbps of SD-WAN with IPsec, QoS, deep packet inspection and Flexible NetFlow enabled. Device software starts at Cisco IOS XE 26.1.1.

Measured Threat Protection

Threat Protection throughput is 1 Gbps with direct internet access NAT, zone-based firewall, intrusion prevention, URL filtering and advanced malware protection all running.

500K Routes And 4K VRFs

The higher 8100 scale tier gives 500K IPv4 routes, 500K IPv6 routes, 10K ACEs and 4K VRFs. Separate routing tables for guest, corporate and device traffic fit within that.

One Combo WAN Port

One of the two WAN ports is an RJ-45/SFP combo, so a second circuit can arrive on either copper or fibre. The other WAN port is 1GE RJ-45.

16W Typical Draw

Typical power is 16W from an external supply rated 30W or 66W. Operating temperature runs from 0 to 40 degrees C at sea level.

Application Scenarios

Small Branch In An SD-WAN Fabric

A small branch that terminates an SD-WAN overlay runs the router’s 900 Mbps SD-WAN feature set on its two WAN ports, while the two LAN ports connect the site switch.

Segmented Retail Or Office Site

In a small retail or office site, the router keeps guest, corporate and device traffic in separate VRFs within its 4K VRF capacity and applies zone-based firewall policy at the internet breakout.

Cupboard Or Under-Desk Install

Where floor space is limited, the fanless 3.5 lb chassis mounts on a wall, under a desk or on DIN-rail, and its 16W typical draw keeps the site’s power load small.

Product Comparison

Parameter

C8131-G2

C8130-G2

C8151-G2

LAN ports

2x 1GE RJ-45

2x 1GE RJ-45

6x 1GE RJ-45

Cellular

Not applicable

Not applicable

Optional pluggable module, LTE or 5G

Forwarding (512B)

1.9 Gbps

1.9 Gbps

5.6 Gbps

SD-WAN capable

Yes

Yes (from IOS XE 26.2.1)

Yes

Threat protection (EMIX)

1 Gbps

Not published

1 Gbps

Number of IPv4 routes

500K

280K

500K

Number of VRFs

4K

1K

4K

Typical power consumption

16W

16W

23W

Weight

3.5 lb

3.5 lb

5.1 lb

C8131-G2 and C8130-G2 share the same six-port fanless chassis, 1.9 Gbps of forwarding and 16W of typical draw, and Cisco separates them on capability: C8131-G2 supports SD-WAN from its Cisco IOS XE 26.1.1 floor and publishes 1 Gbps of Threat Protection, while C8130-G2 reaches SD-WAN only from Cisco IOS XE 26.2.1 and has no Threat Protection figure. The table tier also rises from 280K IPv4 routes and 1K VRFs on C8130-G2 to 500K routes and 4K VRFs here, so a branch that segments traffic into many VRFs needs this model. A site that needs six LAN ports, 5.6 Gbps of forwarding or a pluggable LTE or 5G module moves to C8151-G2, which weighs 5.1 lb against 3.5 lb and draws 23W against 16W.

Ordering Checklist

  • External power supply: Choose the 30W or the 66W external supply on the order. Both ratings are listed for C8131-G2, so the wattage is not fixed until selected.

Optional Add-ons

Add-on

Description

30W external power supply

Lower-wattage supply option listed for this model.

66W external power supply

Higher-wattage supply option listed for this model.

Specifications

Parameter Specification Parameter Specification
Product ID C8131-G2 Series Cisco 8100 Series Secure Routers
Product type Fanless small-branch router WAN ports 1x 1GE RJ-45 and 1x 1GE RJ-45/SFP combo
Flex ports 2 x GE RJ-45 LAN ports 2x 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 30W/66W external power supply Typical power consumption 16W
SD-WAN capable Yes Forwarding (512B) 1.9 Gbps
IPsec (512B) 1.5 Gbps SD-WAN (512B) 900 Mbps
Threat protection (EMIX) 1 Gbps SD-WAN measurement basis IPsec, Quality of Service, deep packet inspection and Flexible NetFlow enabled
Threat protection measurement basis 100% Direct Internet Access NAT, Zone-Based Firewall, Intrusion Prevention System, URL Filtering and Advanced Malware Protection enabled IPv4 routes 500K
IPv6 routes 500K IPv4 ACLs 4K
IPv4 ACEs 10K NAT sessions 100K
VRFs 4K IPsec tunnels 250
Dimensions (H x W x D) 1.09 x 7.8 x 10.8 in Weight 3.5 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 26.1.1
Minimum SD-WAN manager release Cisco Catalyst SD-WAN Release 26.1.1

Quality Certifications

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    Cynthia G.
    Posted on 05/08/2026
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    had the part nobody else had. they had it on the shelf.

    Jason F.
    Posted on 05/05/2026
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    config loaded fine. the site made it easy to compare options. in stock and ready to ship

    Todd R.
    Posted on 13/02/2026
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    5.0

    they carry the stuff nobody else bothers with. website easy to navigate for ordering, no problems

Questions & Answers

  • What IPsec throughput is C8131-G2 rated for?

    C8131-G2 provides 1.9 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 Threat Protection throughput is 1 Gbps at EMIX with NAT, firewall, intrusion prevention, URL filtering and malware protection running.
  • Which external AC adapter is the default order configuration for C8131-G2?

    The Cisco 8000 Series ordering guide lists the default power supply as the AC adapter PWR-CC1-30WAC. The data sheet rates the external supply at 30W or 66W, and typical draw is 16W, so the default adapter covers the router at normal load.
  • From which release is platform-based licensing supported on C8131-G2?

    Platform-based licensing was introduced for C8131-G2 in the Cisco IOS XE 26.1.x releases, per the Cisco 8000 Series licensing guide. The licensing tags then apply to the router in autonomous, SD-Routing and SD-WAN controller modes.
  • Which license tags does C8131-G2 use in SD-Routing mode?

    In SD-Routing mode C8131-G2 can run Cisco Routing Advantage (LIC-ROS-S-A), Cisco WAN Essentials (LIC-CSWAN-S-E) or Cisco WAN Advantage (LIC-CSWAN-S-A), per the Cisco 8000 Series licensing guide. The tag chosen sets the feature tier the router is entitled to.
  • Which license tags apply to C8131-G2 in autonomous mode?

    In autonomous mode C8131-G2 runs under Cisco Routing OS Essentials, with Cisco Routing Advantage available under the tag LIC-ROS-S-A, per the Cisco 8000 Series licensing guide. The Cisco WAN tags are used only when the router is managed in SD-WAN controller mode.

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DataSheet Downloads

  • C8131-G2 Datasheet