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Name: |
C2851-35UC-VSEC/K9 |
Description: | 2851 w/ PVDM2-48,NME-CUE,35 CME/CUE/Ph lic,Adv IP,128F/512D |
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GTIN: | 818217087925 ![]() |
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C2851-35UC-VSEC/K9 Overview
C2851-35UC-VSEC/K9 is a fixed-architecture integrated services router designed for branch office and enterprise applications. It supports internal AC power with options for redundancy, features dual WAN interfaces for reliable connectivity, and provides integrated LAN ports that ensure seamless data, voice, and video communication. Its design incorporates modular capabilities through two EHWIC slots and built-in VPN features, such as IPSec and SSL VPN, to secure remote connections.
This router delivers a throughput capacity of approximately 35 Mbps, ensuring efficient performance for demanding applications. It offers a suite of integrated services including voice, video, and WAN optimization, and supports advanced routing protocols like OSPF, EIGRP, and BGP. With high availability support, enhanced firewall protection, and tailored use cases ranging from enterprise branch networking to unified communications, the C2851-35UC-VSEC/K9 meets rigorous business requirements without compromise.
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C2851-35UC-VSEC/K9 Specifications
Product Type | Enterprise Router |
VPN Support | IPSec / SSL VPN |
Power Source | AC Power Supply |
Routing Protocols | OSPF / BGP / EIGRP / Static Routing |
Broadband | N/A |
Architecture | Fixed |
WAN Configuration | Dual WAN |
WAN Ports | 2 WAN |
LAN Ports | 2 LAN Ports |
Ethernet Technology | 10/100 |
Wi-Fi Standard | N/A |
Connectivity Type | Wired / Ethernet |
Network Protocols | RIP, OSPF, EIGRP, BGP, IS-IS, Static Routing |
Remote Management | Telnet, SSH, SNMP, Cisco SDM |
Compliance Standards | FCC, CE, RoHS |
Wireless Support | No |
Speed/Capacity | N/A |
Firewall Features | Yes |
Features | VPN, Firewall, IPv6 Compatible, Voice, Video, WAN Optimization |
Use Case | Enterprise / Business |
Management | Managed |
Form Factor | Rack-mount |
Integrated Services | Voice / Video / WAN Optimization |
High Availability Support | Supported |
Safety | N/A |
EMC | N/A |
Telecom | N/A |
Throughput Capacity | 0.035 Gbps |
QoS Features | Supported |
Built-in Security Features | Firewall / Intrusion Prevention / VPN |
Expansion Slots | EHWIC |
Modular Slots Available | 2 Slots |
Stacking Capability | No |
5G Support | No |
Memory | 256 MB |
Flash Memory | 256 MB |
Interface Ports | RJ-45 / SFP |
Power | 85 Watt |
Device Type | Router |
Product Name | Cisco 2851 Integrated Services Router - 35UC-VSEC |
Height | 1.73 inches |
Width | 17.27 inches |
Depth | 11.2 inches |
Weight | 17.6 lbs |
Quality Certifications
To get the detailed certification, please go to the Compliance Center.







Product Comparison Table
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Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Supervisor Engine for Modular Routers | Enterprise Router |
Connectivity Type | Wired / Ethernet | Wired | Wired | Wired | Wired |
Broadband | N/A | N/A | N/A | N/A | Fiber Optic / DSL |
Power Source | AC Power Supply | AC Power Supply / Redundant | AC Power Supply / Redundant | Chassis-Provided (Redundant) | AC Power Supply / Redundant |
Architecture | Fixed | Modular | Modular | Modular | Modular |
WAN Configuration | Dual WAN | Dual WAN | Dual WAN | N/A | Dual WAN |
WAN Ports | 2 WAN | 2 WAN | 2 WAN | N/A | 2 WAN |
LAN Ports | 2 LAN Ports | 2 LAN Ports | 4 LAN Ports | N/A | 8 LAN Ports |
Ethernet Technology | 10/100 | 10/100 | 10/100/1000 | N/A | 10/100/1000 |
Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
Wireless Support | No | No | No | No | No |
Speed/Capacity | N/A | N/A | Gigabit | Gigabit | Gigabit |
Routing Protocols Supported | - | - | - | - | - |
VPN Support | IPSec / SSL VPN | IPSec | IPSec / SSL VPN / GRE / DMVPN / FlexVPN | N/A | IPSec / SSL VPN |
Firewall Features | Yes | Yes | Yes | N/A | Yes |
Features | VPN, Firewall, IPv6 Compatible, Voice, Video, WAN Optimization | VPN / IPv6 Compatible / Firewall | VPN / Firewall / IPv6 Compatible / QoS | Integrated Services, Redundancy, Modular Capabilities, High Availability | VPN / Firewall / IPv6 Compatible / MPLS |
Use Case | Enterprise / Business | Enterprise / Small Business | Enterprise | Enterprise | Enterprise |
Management | Managed | Managed | Managed | Managed | Managed |
Form Factor | Rack-mount | Rack-mount | Rack-mount | Chassis | Rack-mount |
Integrated Services | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization | WAN Optimization |
High Availability Support | Supported | Supported | Supported | Supported | Supported |
Throughput Capacity | 0.035 Gbps | 0.025 Gbps | 10 Gbps | N/A | 10 Gbps |
QoS Features | Supported | Supported | Supported | Supported | Supported |
Built-in Security Features | Firewall / Intrusion Prevention / VPN | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | N/A | Firewall / Intrusion Prevention |
Expansion Slots | EHWIC | NIM | NIM / SFP+ | N/A | NIM |
Modular Slots Available | 2 Slots | 2 Slots | 3+ Slots | N/A | 3+ Slots |
Stacking Capability | No | No | Yes | No | Yes |
5G Support | No | No | No | No | No |
Memory | 256 MB | 256 MB | 4 GB | 512 MB | 4 GB |
Flash Memory | 256 MB | 128 MB | 512 MB | 256 MB | 512 MB |
Interface Ports | RJ-45 / SFP | RJ-45 | RJ-45 / SFP | N/A | RJ-45 / SFP |
Device Type | Router | Router | Router | Supervisor Engine | Router |
Product Name | Cisco 2851 Integrated Services Router - 35UC-VSEC | CISCO2811-SRST/K9 | ASR-9010-2P-KIT | Cisco 7606S-SUP720B-P | JF801A Enterprise Router |
Height | 1.73 inches | 1.72 inches | 3.5 inches | N/A | 2 inches |
Width | 17.27 inches | 17.24 inches | 17.5 inches | N/A | 17 inches |
Depth | 11.2 inches | 14.96 inches | 28 inches | N/A | 18 inches |
Weight | 17.6 lbs | 21.52 lbs | 50 lbs | N/A | 15 lbs |
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