C8231-E-G2 – 2×1/10GE SFP+ – 2×2.5GE mGig UPOE+ – 1x NIM Slot – 8 GB DRAM

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C8231-E-G2 Description

The C8231-E-G2 is a Cisco 8200 Series Secure Router in a 1 RU modular chassis for branches that add serial, async or cellular connectivity. The router has 2x 1/10 GE SFP+ and 2x 2.5 GE mGig RJ-45 WAN ports with 2x UPOE+, one NIM slot, one PIM slot, 19 Gbps of forwarding, 5 Gbps of IPsec and 8 GB of DRAM. The default 140 W AC internal supply carries no PoE, and the 150 W AC for PoE adapter provides a 120W budget.

Quick Specs

Parameter

Specification

Product ID

C8231-E-G2

Platform type

Modular platform, 1 RU

WAN ports

2x 1/10 GE SFP+ and 2x 2.5 GE mGig RJ-45 with 2x UPOE+

Expansion slots

1 x NIM

Cellular slot

1 x PIM

Default power supply model

140 W AC internal; no PoE on the default supply

Maximum PoE budget with the 150 W AC for PoE adapter

120W

Forwarding throughput

19 Gbps at 512 bytes

IPsec throughput

5 Gbps at 512 bytes

Threat protection throughput

1 Gbps at EMIX

DRAM

8 GB

Minimum software release

Cisco IOS XE Release 17.18.1

Product Performance

Forwarding Throughput
IPsec Throughput
SD-WAN Throughput

Key Features

Transport Throughput Of The Higher Tier

Forwarding, IPsec and SD-WAN run at 19, 5 and 4 Gbps, the same figures as C8235-E-G2.

8 GB DRAM And 1 Gbps Inspection

With 8 GB of DRAM and 1 Gbps of Threat protection, the router suits designs that run a lighter set of services on the box.

NIM And PIM Slots

One NIM slot and one PIM slot let serial, async, Ethernet or cellular modules be added later.

AC, DC And PoE Supply Options

The 140 W AC internal default is joined by a 150 W AC for PoE adapter, a secondary PSU adapter, a 150 W AC-DC and a 150 W DC-DC supply.

NEBS Range With A Fan Condition

The -5 to 55 degrees C NEBS range up to 6000 feet needs an additional third fan assembly.

1 RU Rack Chassis

At 1 RU and 8.36 lbs the chassis racks directly, with no mounting tray.

Application Scenarios

Branch With Regional Hub Inspection

At a branch whose deep inspection runs at a regional hub, the router handles SD-WAN at 4 Gbps and encryption at 5 Gbps with 1 Gbps of Threat protection.

Serial And Async Handoff

At a site with legacy serial or async equipment, the NIM slot takes a serial or async module while the WAN ports connect to the carrier.

Rack-Mounted Branch Closet

In a branch closet with a 19-inch rack, the 1 RU chassis mounts directly and powers up to 120W of endpoints from the two UPOE+ ports with the PoE adapter.

Product Comparison

Parameter

C8231-E-G2

C8235-E-G2

C8231-G2

WAN ports

2x 1/10 GE SFP+, 2x 2.5 GE mGig (2x UPOE+)

2x 1/10 GE SFP+, 2x 2.5 GE mGig (2x UPOE+)

2x 1/10 GE SFP+, 2x 2.5 GE mGig (1x PoE+)

Flex ports

Not applicable

Not applicable

2x 2.5 GE mGig

Expansion slots

1 x NIM

1 x NIM

Not applicable

Cellular slot

1 x PIM

1 x PIM

Not applicable

Forwarding (512B)

19 Gbps

19 Gbps

19 Gbps

Threat protection (EMIX)

1 Gbps

2.4 Gbps

1 Gbps

DRAM

8 GB

16 GB

8 GB

Default PoE budget

None; the default supply carries no PoE

None; the default supply carries no PoE

None; the default supply carries no PoE

PoE budget with the PoE adapter

120W

120W

30W

C8231-E-G2 and C8235-E-G2 share the 1 RU chassis, the NIM and PIM slots, 19 Gbps forwarding and a 120W PoE ceiling with the PoE adapter, but C8231-E-G2 has 8 GB of DRAM and 1 Gbps of Threat protection against 16 GB and 2.4 Gbps. A site that inspects traffic on the router above 1 Gbps needs C8235-E-G2, and a site that inspects at a hub does not. C8231-G2 is the desktop alternative: it has no NIM or PIM slot and stops at 30W of PoE, but adds two Flex and four LAN copper ports, so a branch with no module and under 30W of powered endpoints can use it. All three start at Cisco IOS XE Release 17.18.1.

PoE Power Planning

Planning Item

Value or Check

PoE on the default supply

None; the 140 W AC internal default supply carries no PoE budget

PoE budget with the upgrade adapter

120W with the 150 W AC for PoE external adapter

UPOE+ capable ports

2 of the 2.5 GE mGig RJ-45 WAN ports

Device count check

Confirm total endpoint draw across the two UPOE+ ports against the 120W budget

Power supply line item

Confirm the 150 W AC for PoE adapter is on the order whenever any port must deliver power

Alternative supply paths

A secondary PSU adapter, a 150 W AC-DC and a 150 W DC-DC supply are listed alongside the PoE adapter

Ordering Checklist

  • PoE power supply: Add the 150 W AC for PoE external adapter, which gives a 120W PoE budget. The default 140 W AC internal supply carries no PoE budget.
  • Secondary power supply: Add a Secondary PSU option, either 150 W AC-DC or 150 W DC-DC external adapter. A DC-fed site needs the DC-DC option, since the default internal supply is AC.
  • NIM card: Select one of C-NIM-WAN-2X, C-NIM-WAN-4S, C-NIM-4X, C-NIM-8T, C-NIM-8M, NIM-1T, NIM-2T, NIM-4T, NIM-16A or NIM-24A. This series lists no SM-form-factor or DSL modules, so those cards are not options.
  • Cellular PIM: Select P-5GS6-R16SA-GL, or the regional P-LTEA7-NA, P-LTEA7-EAL or P-LTEA7-JP. LTE-Advanced pluggables are sold by region.
  • Storage option: Choose the default 16 GB or the upgrade to 600 GB when the router is ordered.
  • Third fan assembly: Add the additional third fan assembly for the -5 to 55 degrees C NEBS range. It is required for that range, so the base configuration does not cover it.

Optional Add-ons

Add-on

Description

C-NIM-WAN-2X

2-port 1/10 Gbps SFP/SFP+ WAN module, NIM with WAN MACsec.

C-NIM-WAN-4S

4-port 1 Gbps SFP WAN module, NIM with WAN MACsec.

C-NIM-4X

4-port 1/10 Gbps SFP/SFP+ switch NIM with LAN/WAN MACsec and optional Layer 3.

C-NIM-8T

8-port 100 Mbps/1 Gbps switch NIM with LAN/WAN MACsec and optional Layer 3.

C-NIM-8M

8-port 100 Mbps/1/2.5 Gbps switch NIM with UPOE+, LAN/WAN MACsec and optional Layer 3.

NIM-1T

1-port serial high-speed WAN interface card.

NIM-2T

2-port serial high-speed WAN interface card.

NIM-4T

4-port serial high-speed WAN interface card.

NIM-16A

16-port asynchronous module.

NIM-24A

24-port asynchronous module.

P-5GS6-R16SA-GL

5G Sub-6 GHz pluggable, 5G SA Global.

P-LTEA7-NA

CAT7 LTE Advanced pluggable, North America.

P-LTEA7-EAL

CAT7 LTE Advanced pluggable, EMEA, APAC and LATAM.

P-LTEA7-JP

CAT7 LTE Advanced pluggable, Japan.

150 W AC for PoE adapter

External adapter that adds the 120W PoE budget.

150 W DC-DC supply

DC input option alongside the AC supplies.

600 GB storage

Capacity option above the 16 GB default.

Specifications

Parameter Specification Parameter Specification
Product ID C8231-E-G2 Series Cisco 8200 Series Secure Routers
Product type Modular platform, 1 RU WAN ports 2x 1/10 GE SFP+ and 2x 2.5 GE mGig RJ-45 with 2x UPOE+
Flex ports Not present on this platform LAN ports Not present on this platform
Expansion slots 1 x NIM Cellular slot 1 x PIM
Management port 1x RJ-45 out-of-band management Console port 1x RJ-45 and 1x micro-USB
DRAM 8 GB SSD storage 16 GB, upgradeable to 600 GB
Default power supply model 140 W AC internal Default PoE budget None; the 140 W AC internal supply carries no PoE
Maximum PoE budget with the 150 W AC for PoE adapter 120W Alternative power supplies Secondary PSU external adapter, 150 W AC-DC, 150 W DC-DC
Typical power consumption 34.20W Input voltage AC: 85 to 264 VAC; DC: -40 to 72V, 48V nominal
Forwarding (512B) 19 Gbps IPsec (512B) 5 Gbps
SD-WAN (512B) 4 Gbps 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, NGFW, Intrusion Prevention System, URL Filtering and Advanced Malware Protection enabled
IPv4/IPv6 routes 1.5M IPsec tunnels 700
IPv4 ACLs 3000 IPv4 ACEs 15,000
NAT sessions 1.5M VRF instances 4000
Dimensions (H x W x D) 1.73 x 17.25 x 11.81 in. (4.39 x 43.82 x 30.00 cm) Rack units 1 RU
Weight 8.36 lbs (3.79 kg) Operating temperature 0 to 40°C up to 10,000 feet; 0 to 45°C up to 6000 feet
NEBS operating temperature -5 to 55°C up to 6000 feet, with an additional third fan assembly required Storage temperature -40 to 70°C
Relative humidity 5 to 85 percent operating; 5 to 95 percent non-operating and storage Supported modules C-NIM-WAN-2X, C-NIM-WAN-4S, C-NIM-4X, C-NIM-8T, C-NIM-8M, NIM-1T, NIM-2T, NIM-4T, NIM-16A, NIM-24A and the four cellular pluggables
Minimum software release Cisco IOS XE Release 17.18.1 and later Minimum SD-WAN manager release Cisco Catalyst SD-WAN Release 20.18.1 and later

Quality Certifications

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    great customer service, will use your company again.

    Maria B.
    Posted on 28/06/2026
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    5.0

    No issues with the router. great value for the money. good deal on a hard to find part.

    Peter F.
    Posted on 08/06/2026
    Verified Buyer
    5.0

    Site is easy to use. good follow up after the order. saved us a lot against the OEM quote

Questions & Answers

  • What throughput does C8231-E-G2 provide with security services enabled?

    C8231-E-G2 forwards 19 Gbps at 512-byte packets. Threat protection runs at 1 Gbps at EMIX, measured with 100% Direct Internet Access NAT, NGFW, Intrusion Prevention System, URL Filtering and Advanced Malware Protection all enabled on the router.
  • Which power supply PID gives C8231-E-G2 its 120W PoE budget?

    PWR-CC1-150WAC, the 150 W AC for PoE adapter, provides the 120W PoE budget on C8231-E-G2. C82G2-POE-DC is auto-included with this supply, per the Cisco 8000 ordering guide. The default 140 W internal supply carries no PoE.
  • Which secondary power supplies can C8231-E-G2 take?

    C8231-E-G2 takes the secondary AC adapter PWR-ADPT-150WAC or the secondary DC adapter PWR-ADPT-150WDC, per the Cisco 8000 ordering guide. The DC input range is -40 to 72V with 48V nominal, and the 140 W internal supply remains the default.
  • Which rack-mount kit is the default for C8231-E-G2?

    The default for C8231-E-G2 is the 19 inch rack-mount kit C8200-RM-19-1R, which suits the 1 RU chassis directly. The wall-mount kit C8200-WM-1R is the listed option. Both kits appear in the Cisco 8000 ordering guide.
  • Which software image options can I select for C8231-E-G2?

    SC82G2UK9-1718 and SC82G2NEK9-1718 are the image options for C8231-E-G2, per the Cisco 8000 ordering guide. Both are Cisco IOS XE 17.18.1 images, which is the minimum release for this model, so no separate image is needed for either mode.
  • Which blank PIDs cover unused slots on C8231-E-G2?

    C8231-E-G2 lists four blanks in the Cisco 8000 ordering guide. C8200-NIM-BLANK covers an empty NIM slot, C8200-PIM-BLANK an empty PIM slot, C-E1S-BLANK the SSD bay and C8200-FAN-BLANK the fan bay. Fit a blank in any slot left empty.
  • Which PID do I order for the NEBS temperature range on C8231-E-G2?

    C82G2-FAN-1R, the NEBS Fan Assembly, is the listed accessory for C8231-E-G2, per the Cisco 8000 ordering guide. The -5 to 55 degrees C range up to 6000 feet depends on adding the additional third fan assembly.
  • Which licence tags does C8231-E-G2 use in autonomous and SD-WAN controller modes?

    Autonomous mode on C8231-E-G2 uses Cisco Routing OS Essentials or Cisco Routing Advantage, tagged LIC-ROS-M-A. SD-WAN controller mode uses Cisco WAN Essentials LIC-CSWAN-M-E or Cisco WAN Advantage LIC-CSWAN-M-A, per the Cisco 8000 licensing guide.

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