C8355-G2 – 4x10G SFP/SFP+ – 4x5G mGig UPOE+ – 120W PoE Budget with Upgrade PSU

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C8355-G2 Description

The C8355-G2 is a Cisco 8300 Series fixed secure router for large branch sites that terminate 10G WAN circuits. The router has four 10G SFP/SFP+ ports, four 5G mGig RJ45 ports and two 1G RJ45 ports, with 38 Gbps of forwarding, 20 Gbps of IPsec, 3500 IPsec tunnels and 16 GB of fixed DRAM. The only module slot is a PIM for cellular, and the default 110W AC adapter carries no PoE until the 230W AC + PoE supply adds a 120W budget.

Quick Specs

Parameter

Specification

Product ID

C8355-G2

WAN ports

2 x 10G SFP/SFP+ and 2 x 5G mGig RJ45 with 2x UPoE+

Flex ports

2 x 5G mGig RJ45 with 2x UPoE+ and 2 x 1G RJ45

LAN ports

2 x 10G SFP/SFP+

Expansion slots

None; cellular PIM only

Cellular slot

1 x PIM

Power supply (default – dual PSU)

110W AC external adapter

Power supply (upgrade options)

230W AC + PoE

Default PoE budget

None; the default 110W AC adapter carries no PoE

Maximum PoE budget with the 230W AC + PoE supply

120W

Forwarding throughput

38 Gbps at 512 bytes

DRAM

16 GB, fixed

Minimum software release

Cisco IOS XE 17.18.1

Product Performance

Forwarding Throughput
IPsec Throughput
SD-WAN Throughput

Key Features

38 Gbps Forwarding And 20 Gbps IPsec

SD-WAN runs at 8.7 Gbps and Threat protection at 3.9 Gbps, measured with NAT, NGFW, IPS, URL filtering and malware protection enabled. The router supports 3500 IPsec tunnels.

Four UPoE+ Ports Behind A Power Decision

All four 5G mGig ports are UPoE+ capable, but the default 110W adapter carries no PoE. The 230W AC + PoE supply provides a 120W budget shared across those ports.

10G On Both WAN And LAN Sides

Two 10G SFP/SFP+ WAN ports are matched by two 10G SFP/SFP+ LAN ports, so a 10G circuit can reach the site core without using the multigigabit copper ports.

Flex Ports That Face Either Way

Two 5G mGig ports and two 1G RJ45 ports are Flex ports that can serve as WAN or LAN, so a second circuit or extra segment does not need new hardware.

Cellular As The Only Module Path

The PIM slot is the sole module bay and takes only cellular pluggables. NIM and SM modules are not supported on this router.

16 GB Fixed DRAM

DRAM is fixed at 16 GB and cannot be upgraded. Storage starts at 16 GB and extends to 32 GB, 600 GB or 2 TB depending on the option selected.

Application Scenarios

Large Branch 10G Termination

At a large branch, the router terminates a 10G circuit on its WAN SFP/SFP+ ports and hands traffic to the site core over two 10G LAN SFP/SFP+ ports.

Cellular Failover Path

In a branch where wired circuits need a failover path, the PIM slot carries a 5G or CAT7 LTE pluggable alongside the wired WAN ports.

Powered Access Layer At The Edge

At a branch without a separate access switch, cameras, access points and phones draw UPoE+ from the four powered 5G mGig ports within the 120W budget of the 230W AC + PoE supply.

Product Comparison

Parameter

C8355-G2

C8375-E-G2

C8235-G2

WAN ports

2 x 10G SFP/SFP+, 2 x 5G mGig RJ45 (2x UPoE+)

2 x 10G SFP/SFP+, 4 x 2.5G mGig RJ45 (2x UPoE+)

2x 1/10 GE SFP+, 2x 2.5 GE mGig RJ-45 (2x UPOE+)

Expansion slots

Not applicable

1 x NIM and 1 x SM

Not applicable

Forwarding (512B)

38 Gbps

38 Gbps

19 Gbps

SD-WAN (512B)

8.7 Gbps

12 Gbps

4 Gbps

Threat protection (EMIX)

3.9 Gbps

7 Gbps

2.4 Gbps

DRAM

16 GB (fixed)

16 GB, upgradeable to 32 GB

16 GB

Default PoE budget

None; 110W AC external adapter

None; 400W AC internal FRU

None; 66W AC external adapter

PoE budget (upgrade supply)

120W with 230W AC + PoE

360W with 760W AC + PoE

120W with 230W AC for PoE

Minimum software release

Cisco IOS XE 17.18.1

Cisco IOS XE 17.15.3

Cisco IOS XE 17.18.1

Weight

9.25 lbs

14.3 lbs

7 lbs

C8355-G2 and C8375-E-G2 both forward 38 Gbps, but C8355-G2 is the fixed unit with no NIM or SM bay, 16 GB of fixed DRAM and 3.9 Gbps of Threat protection, where C8375-E-G2 adds one NIM and one SM slot, DRAM upgradeable to 32 GB and 7 Gbps. Sites that need a serial, DSL or switch module, or more than 8.7 Gbps of SD-WAN, move to C8375-E-G2, whose 760W supply gives 360W of PoE against 120W here; it also starts at Cisco IOS XE 17.15.3 against 17.18.1. Branches that stay within 19 Gbps of forwarding can order C8235-G2, a 7 lbs desktop unit with the same 120W PoE and 16 GB but 2.4 Gbps of Threat protection.

PoE Power Planning

Planning Item

Value or Check

PoE on the default supply

None; the default 110W AC external adapter carries no PoE budget

PoE budget with the upgrade supply

120W with the 230W AC + PoE power supply

UPoE+ capable ports

4 multigigabit ports, 2 on the WAN side and 2 on the Flex side

Device count check

Confirm total endpoint draw across the four UPoE+ ports against the 120W budget, since the budget is well below four ports at full UPoE+

Power supply line item

Confirm the 230W AC + PoE supply is on the order whenever any port must deliver power

Dual supply input

Confirm both power supply inputs are cabled if the site requires supply redundancy

Ordering Checklist

  • PoE supply: Add the 230W AC + PoE supply, which carries the 120W PoE budget. The default 110W AC external adapter has no PoE budget.
  • Cellular PIM: Select P-5GS6-R16SA-GL, P-LTEA7-NA, P-LTEA7-EAL or P-LTEA7-JP; only cellular modules are supported on this model. NIM and SM modules from the C8375-E-G2 list do not apply here.
  • Storage: Choose the 16 GB default, or the 32 GB, 600 GB or 2 TB option. The option ordered sets the storage capacity.

Optional Add-ons

Add-on

Description

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.

Specifications

Parameter Specification Parameter Specification
Product ID C8355-G2 Product type Fixed platform, 1 RU
Series Cisco 8300 Series Secure Routers WAN ports 2 x 10G SFP/SFP+ and 2 x 5G mGig RJ45 with 2x UPoE+
Flex ports 2 x 5G mGig RJ45 with 2x UPoE+ and 2 x 1G RJ45 LAN ports 2 x 10G SFP/SFP+
Expansion slots No NIM or SM bay; cellular PIM only Cellular slot 1 x PIM
Management port 1 x RJ45 out-of-band management Console port 1 x RJ45 and 1 x Micro-USB
Storage interface USB 3.0 Type C Asset tag RFID
DRAM 16 GB, fixed SSD storage 16 GB default, with 32 GB, 600 GB and 2 TB options
Power supply (default – dual PSU) 110W AC external adapter Power supply (upgrade options) 230W AC + PoE
Default PoE budget None; the default 110W AC adapter carries no PoE Maximum PoE budget with the 230W AC + PoE supply 120W
Typical power consumption 45W with the default supply and no modules AC input voltage AC: 85 to 264 VAC
Forwarding (512B) 38 Gbps IPsec (512B) 20 Gbps
SD-WAN (512B) 8.7 Gbps Threat protection (EMIX) 3.9 Gbps
SD-WAN measurement basis IPsec, QoS, Deep Packet Inspection and Flexible NetFlow enabled Threat protection measurement basis 100% DIA-NAT, NGFW, IPS, URLF and AMP enabled
IPv4/IPv6 routes 2M IPsec tunnels 3500
IPv4 ACLs 4000 IPv4 ACEs 20K
NAT sessions 1.5M VRFs 4000
Dimensions (H x W x D) 1.73 in x 17.5 in x 11.49 in Rack units 1 RU
Weight 9.25 lbs Operating temperature 0°C to 40°C (32°F to 104°F) at sea level
Storage temperature -40°C to 70°C (-40°F to 158°F) Minimum software release Cisco IOS XE 17.18.1
Minimum SD-WAN manager release Cisco Catalyst SD-WAN Manager 20.18.1 Supported modules Cellular PIM only: P-5GS6-R16SA-GL, P-LTEA7-NA, P-LTEA7-EAL, P-LTEA7-JP

Quality Certifications

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    good price, great company.

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    in stock and ready to ship

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    Posted on 14/03/2026
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    Quick quote, no messing about, they had it in stock when others didn’t, shipping cost was reasonable.

Questions & Answers

  • What throughput does C8355-G2 provide with security services enabled?

    C8355-G2 forwards 38 Gbps at 512-byte packets. Threat protection runs at 3.9 Gbps at EMIX, measured with 100% DIA-NAT, NGFW, IPS, URLF and AMP all enabled on the router. SD-WAN reaches 8.7 Gbps with IPsec, QoS, Deep Packet Inspection and Flexible NetFlow enabled.
  • Which PIDs are the default and PoE power supplies for C8355-G2?

    PWR-CC1-110WAC is the default AC supply for C8355-G2, and PWR-CC1-230WAC is the AC + PoE option that provides the 120W budget, per the Cisco 8000 ordering guide. The default adapter carries no PoE, so any powered endpoint needs the PoE supply.
  • Which rack-mount kit is the default for C8355-G2?

    The default for C8355-G2 is the 19 inch rack-mount kit C8300-RM-19-F, per the Cisco 8000 ordering guide. The 23 inch rack-mount kit C8300-RM-23-F is the listed option for sites with 23 inch racks. Select the kit that matches the rack width at order time.
  • Which software image options can I select for C8355-G2?

    SC83G2UK9-1718 and SC83G2NEK9-1718 are the image options for C8355-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 licence tags does C8355-G2 use in autonomous and SD-WAN controller modes?

    Autonomous mode on C8355-G2 uses Cisco Routing OS Essentials or Cisco Routing Advantage, tagged LIC-ROS-L-A. SD-WAN controller mode uses Cisco WAN Essentials LIC-CSWAN-L-E or Cisco WAN Advantage LIC-CSWAN-L-A, per the Cisco 8000 licensing guide.
  • Which accessory PIDs are listed for C8355-G2?

    C8355-G2 lists the power adapter bracket C83G2-ADPT-BRKT and the chassis top cover C83G2-TOP-PLATE as options in the Cisco 8000 ordering guide. The bracket holds the external power adapter and the cover closes the chassis top. Both are optional and not part of the default configuration.
  • Which blank PID and RFID option apply to C8355-G2?

    C8300-PIM-BLANK covers the PIM slot on C8355-G2 when no cellular pluggable is fitted, per the Cisco 8000 ordering guide. The optional RFID asset tag is C-RFID-1R, with C-RFID-NONE as the default selection. Neither item changes the throughput or port count of the router.

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DataSheet Downloads

  • C8355-G2 Datasheet