C8131-G2 – 1x1GE WAN + 1x1GE Combo – 2x Flex + 2x LAN – SD-WAN Capable
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C8131-G2 Description
The C8131-G2 is the SD-WAN capable counterpart to the entry model in the Cisco 8100 Series, sharing its six-port fanless chassis but not its capability tier. Ports are one 1GE RJ-45 WAN, one 1GE RJ-45/SFP combo WAN, two Flex and two LAN, and Cisco marks the model SD-WAN Capable Yes, publishing 900 Mbps of SD-WAN and 1 Gbps of Threat Protection alongside the 1.9 Gbps forwarding and 1.5 Gbps IPsec both models share. Table scale moves to the higher 8100 tier at 500K IPv4 routes and 4K VRFs. It draws 16W typical on a 30W or 66W supply, weighs 3.5 lb and starts at Cisco IOS XE 26.1.1.
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 |
|
Chassis weight |
3.5 lb |
|
Minimum software release |
Cisco IOS XE 26.1.1 |
Product Performance
Key Features
This is the lightest 8100 model Cisco marks SD-WAN Capable Yes, so a small site joining a fabric does not have to move up to the 5.1 lb bodies that carry a cellular bay.
Cisco lists 1 Gbps of Threat Protection measured with NAT, zone-based firewall, intrusion prevention, URL filtering and malware protection enabled, a figure the routing-only models in the series do not carry at all.
Moving to the SD-WAN tier lifts IPv4 routes from 280K to 500K, IPv6 from 260K to 500K, VRFs from 1K to 4K and ACEs from 5K to 10K, which is what supports multi-tenant or segmented branch designs.
Typical draw stays at 16W and the supply options stay at 30W or 66W, so the capability step costs nothing in power or thermal planning.
The floor is Cisco IOS XE 26.1.1 rather than the 17.18.1 of the routing-only models, so this router and its twin cannot run a common image across a mixed estate.
The chassis has no moving parts while carrying the full SD-WAN feature combination, which suits ceiling voids, cupboards and occupied rooms where a fan would be audible.
Application Scenarios
Deployed at branches that terminate an overlay tunnel and run the full SD-WAN feature set on a six-port chassis.
Installed where several VRFs separate guest, corporate and device traffic within a small site, using the 4K VRF tier.
Placed in rooms where the fanless body matters and the site still has to appear as a managed fabric endpoint.
Product Comparison
|
Parameter |
C8131-G2 | ||
|---|---|---|---|
|
SD-WAN Capable |
Yes |
No |
Yes |
|
WAN Ports |
1x 1GE RJ-45, 1x 1GE RJ-45/SFP combo |
1x 1GE RJ-45, 1x 1GE RJ-45/SFP combo |
2x 1GE RJ-45/SFP combo |
|
LAN Ports |
2x 1GE RJ-45 |
2x 1GE RJ-45 |
6x 1GE RJ-45 |
|
Cellular |
None on this platform |
None on this platform |
Optional pluggable module, LTE or 5G |
|
Forwarding throughput |
1.9 Gbps |
1.9 Gbps |
5.6 Gbps |
|
SD-WAN throughput |
900 Mbps |
Not listed for this model |
900 Mbps |
|
Threat Protection throughput |
1 Gbps |
Not listed for this model |
1 Gbps |
|
IPv4 routes |
500K |
280K |
500K |
|
VRFs |
4K |
1K |
4K |
|
External power supply |
30W/66W |
30W/66W |
66W |
|
Typical power |
16W |
16W |
23W |
|
Chassis weight |
3.5 lb |
3.5 lb |
5.1 lb |
|
Minimum software release |
Cisco IOS XE 26.1.1 |
Cisco IOS XE 17.18.1 |
Cisco IOS XE 17.18.1 |
- C8131-G2 and C8130-G2 are the same six-port fanless chassis at the same 16W draw and 3.5 lb weight, separated by capability rather than hardware. This model is marked SD-WAN Capable Yes with 900 Mbps of SD-WAN and 1 Gbps of Threat Protection published, and its table tier rises to 500K routes and 4K VRFs.
- Forwarding and IPsec are identical at 1.9 and 1.5 Gbps, so the premium is entirely about fabric participation and scale rather than transport speed. A site that will never join an SD-WAN fabric gets the same measured throughput from the routing-only model.
- C8151-G2 shows what the next step up buys for the same 900 Mbps of SD-WAN: forwarding triples to 5.6 Gbps, LAN ports go from two to six, and a cellular pluggable bay appears, at the cost of 7W more typical draw and 1.6 lb more weight.
- For deciding which SKU to order, confirm fabric participation first, because that separates this model from C8130-G2 and also decides the route table tier; then count LAN ports and check whether cellular backup is needed, since those two are what move the order to C8151-G2.
Selection Guide
1. Fabric Participation Is The Whole Decision Against Its Twin
C8130-G2 matches this router on ports, chassis, supply and 1.9 Gbps forwarding but is marked SD-WAN Capable No with no SD-WAN or Threat Protection figure published; a site joining a fabric has to be here, and one that never will gains nothing from the higher tier.
2. Four Thousand VRFs Instead Of One Thousand
The SD-WAN tier also carries the larger tables, so a small branch segmenting guest, corporate and IoT traffic into separate VRFs reaches a ceiling on the routing-only model long before it reaches one here.
3. Two LAN Ports Against Six
C8151-G2 offers six LAN ports to this model’s two at the same 900 Mbps SD-WAN throughput; a site with more than four wired devices behind the router exhausts this faceplate while gaining nothing in overlay capacity by moving up.
4. Cellular Backup Requires A Larger Body
No 8100 model at 3.5 lb carries a cellular bay; adding an LTE or 5G pluggable means C8151-G2 or C8161-G2 at 5.1 lb, or an embedded-5G model, so wireless backup changes the chassis rather than the configuration.
5. Twenty-Six Point One Point One Against Seventeen Point Eighteen
This model requires Cisco IOS XE 26.1.1 while C8130-G2, C8140-G2, C8151-G2 and C8161-G2 sit on 17.18.1; an estate standardising on one image across the 8100 range has to account for the split rather than assume a single train covers the series.
Ordering Checklist
|
Check Item |
What to Confirm |
Why It Matters |
|---|---|---|
|
Fabric participation |
Confirm the site will join a Cisco Catalyst SD-WAN fabric. |
Cisco marks this model SD-WAN Capable Yes, and a routing-only site can use the cheaper C8130-G2 instead. |
|
Software train readiness |
Confirm the estate can run Cisco IOS XE 26.1.1 and Cisco Catalyst SD-WAN Release 26.1.1. |
This model sits on a different release family from the four 8100 models at 17.18.1. |
|
LAN port count |
Confirm no more than two wired devices connect behind the router. |
Only two LAN ports plus two Flex ports are available on this chassis. |
|
Combo port media |
Confirm whether the combo WAN port will use copper or an SFP optic, and order the optic if fibre is used. |
The cage accepts either but an optic is a separate line item. |
|
Power supply wattage |
Confirm whether the 30W or the 66W external supply is required. |
Cisco lists both for this model and the supply ships with the order. |
|
Mounting method |
Confirm which of rackmount, desktop, under-desk or DIN-rail mounting the site uses and that the hardware is on the order. |
Each mounting position needs its own accessory. |
|
Site altitude |
Confirm the altitude and derate the 40 degrees C ceiling by 1 degree per 1000 feet. |
The thermal rating is altitude-dependent rather than a fixed figure. |
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 |
| 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 |
| 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 | 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 D x W) | 1.09 x 7.8 x 10.8 in | Chassis weight | 3.5 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 26.1.1 |
| Minimum SD-WAN Manager release | Cisco Catalyst SD-WAN Release 26.1.1 |
Get More Information
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Quality Certifications
Customer Reviews
Questions & Answers
-
Why choose C8131-G2 over C8130-G2 if their ports are the same?
-
Can C8131-G2 sustain a full 1 Gbps SD-WAN service?
-
Which subscription does C8131-G2 need for Catalyst SD-WAN?
-
How many copper and fiber WAN connections does C8131-G2 provide?
-
Can C8131-G2 take the 5G PIM used by C8151-G2?
-
Is the C8131-G2 threat-protection rating the same as its IPsec rating?
-
Can C8131-G2 memory be expanded for a larger branch deployment?
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