# Cisco ASR 1006 Aggregation Services Router: The Ultimate Datasheet Guide

Ever stared down a network bottleneck during peak hours and wished for a router that just *handles it*? That’s where the Cisco ASR 1006 shines. This 6-slot modular beast from the ASR 1000 series is built for the edge of enterprise and service provider networks, scaling from a nimble 2.5 Gbps to a screaming 100 Gbps throughput. Whether you’re aggregating WAN traffic, delivering managed services, or securing multi-tenant VPNs, the ASR 1006 delivers with hardware redundancy, ISSU for zero-downtime upgrades, and IOS XE smarts. Check out the [official Cisco page](https://www.cisco.com/c/en/us/products/routers/asr-1000-series-aggregation-services-routers/index.html) for more, but let’s break it down here like a field engineer would.

## Why the Cisco ASR 1006 Stands Out in the Wild

Here’s the thing: in mission-critical setups, you can’t afford downtime or weak performance. The ASR 1006’s modular 6-slot chassis gives you flexibility—two slots for route processors (RPs), two for Embedded Services Processors (ESPs), and two for SPA Interface Processors (SIPs). Pop in dual RPs for stateful switchover, and you’re golden on redundancy. Add up to two ESPs, and throughput scales effortlessly: ESP20 for 20 Gbps, ESP40 for 40 Gbps, or ESP100 hitting 100 Gbps. That’s not just specs; it’s real-world scale for DCI or carrier Ethernet edges.

What really sets it apart? In-service software upgrades (ISSU). Imagine pushing IOS XE updates without a blip—your traders or streaming services won’t even notice. Security’s baked in too: IPsec tunnels, zone-based firewalls, NAT, MACsec encryption, and deep packet inspection via integrated threat defense. QoS? Advanced policing, shaping, and hierarchical policies keep voice crystal clear over MPLS VPNs. And programmability? NETCONF/RESTCONF APIs let DevOps folks automate like pros.

Oh, and don’t sleep on the interface game. Up to 12 SPA slots mean 10GE, 1GE, or even older T1/E1 ports if you’re migrating legacy. It’s IPv4/IPv6 native, full MPLS support as a PE router, and flexible power—AC/DC with hot-swap PSUs and fans. Field-replaceable everything keeps MTTR low.

## Technical Specifications at a Glance

Let’s get nerdy with the hard numbers. I’ve pulled these straight from Cisco’s docs into easy tables so you can spec it out fast.

### Core Chassis Specs

| Feature | Details |
|——————|———————————-|
| **Airflow** | Front-to-back |
| **SPA Slots** | Up to 12 (6 per SIP) |
| **Redundancy** | Route processor, ESP, power supply, fan tray |
| **Chassis Slots**| 6 (2 RP, 2 ESP, 2 SIP) |
| **Rack Mounting**| 19-inch EIA |
| **Alarm Contacts** | Yes |
| **LED Indicators** | Status, alarm, power, fan |

This front-to-back airflow is a lifesaver in dense racks—keeps thermals in check without extra fans howling.

### Performance and Scalability

– **Throughput**: 2.5–100 Gbps (ESP-dependent)
– **Software**: Cisco IOS XE (e.g., SASR1K9-13.3S universal image)
– **Interfaces**: Diverse SPAs for WAN/LAN (10GE, 1GE, etc.)
– **Power Options**: AC/DC, redundant/hot-swappable
– **Dimensions**: Standard 19″ rack, 6RU height

## Key Features and Real Benefits

Now, let’s talk features that pay dividends. Dual RPs (like ASR1000-RP3) mean 1+1 redundancy—if one flakes, the other takes over in milliseconds. ESPs handle the heavy lifting: forwarding, encryption, QoS. I’ve seen these in service provider pops where ESP100s chew through 100 Gbps MPLS with AES encryption without batting an eye.

High-availability isn’t just buzz—software features like NSF/SSO, graceful restart, and ISSU make it enterprise-grade tough. Security stack? It’s comprehensive: firewall services, NAT44/64, IPsec scale to thousands of tunnels. For traffic management, modular QoS lets you prioritize Zoom calls over bulk backups.

Programmability is huge for modern nets. RESTCONF/YANG models mean you can spin up services via Ansible playbooks. Supports BGP, OSPF, IS-IS at massive scale—perfect for IPv6 migrations. And those hot-swap fans/PSUs? Swap ’em mid-day without forklift upgrades.

Compared to older ASR 1004s or even some Juniper MX5s, the 1006’s modularity wins. You scale without rip-and-replace, and Cisco’s ecosystem (DNA Center integration) gives you visibility rivals can’t match. In my book, if you’re doing WAN agg or managed services, this is the smart pick—future-proof and cost-effective long-term.

## Deployment Use Cases: Where It Crushes

Picture this: a large telco aggregating 50+ branches into their MPLS core. ASR 1006 as PE router, SIP40s loaded with 10GE SPAs, ESP40 for throughput. ISSU lets them patch quarterly without SLA hits.

Or enterprise DCI: interconnecting data centers over dark fiber. Dual RPs, MACsec for encryption, QoS for low-latency apps. Handles bursty cloud traffic like a champ.

Managed services? Multi-tenant VPN gateway with per-customer firewalls and NAT. Deep packet inspection blocks threats inline. High-availability for branch offices? Stack it with SD-WAN overlays.

Carrier Ethernet edges, secure VPN concentrators, even cloud on-ramps—it’s versatile. One real-world example: a MSP I know deployed these for a retail chain during Black Friday surges. Zero drops, scaled seamlessly.

## Ordering Guide: SKUs You Need

Building your ASR 1006? Start with the base chassis (ASR1006), then layer on. Here’s the full ordering table—licenses like FLASR1-AES unlock premium features.

### Base System and Chassis

| SKU | Type | Description |
|——————|————|————————————————–|
| ASR1006 | Base System | Cisco ASR 1006 Chassis (no PS, RP, ESP, SIP, SPA)|
| ASR1006-PWR-AC | Power Supply | Cisco ASR 1006 AC Power Supply |
| ASR1006-PWR-DC | Power Supply | Cisco ASR 1006 DC Power Supply |
| ASR1006-AC-PEM | Accessory | Cisco ASR 1006 AC Power Entry Module |
| ASR1006-DC-PEM | Accessory | Cisco ASR 1006 DC Power Entry Module |
| ASR1006-FAN | Accessory | Cisco ASR 1006 Fan Tray |
| ASR1006-RACK | Accessory | Cisco ASR 1006 Rack Mount Kit |

### Processors and Modules

| SKU | Type | Description |
|——————|————|————————————————–|
| ASR1000-RP2 | Module | Cisco ASR 1000 Series Route Processor 2 |
| ASR1000-RP3 | Module | Cisco ASR 1000 Series Route Processor 3 |
| ASR1000-ESP20 | Module | Cisco ASR 1000 Series ESP 20 Gbps |
| ASR1000-ESP40 | Module | Cisco ASR 1000 Series ESP 40 Gbps |
| ASR1000-ESP100 | Module | Cisco ASR 1000 Series ESP 100 Gbps |
| ASR1000-SIP10 | Module | Cisco ASR 1000 Series SPA Interface Processor-10 |
| ASR1000-SIP40 | Module | Cisco ASR 1000 Series SPA Interface Processor-40 |
| SIP-400 | Module | Cisco ASR 1000 Series SPA Interface Processor-400|

### Interface Modules and Software

| SKU | Type | Description |
|——————|————|————————————————–|
| SPA-1X10GE-L-V2 | Module | Cisco ASR 1000 Series 1-port 10GE SPA |
| SPA-2X1GE-V2 | Module | Cisco ASR 1000 Series 2-port 1GE SPA |
| SASR1K9-13.3S | License | Cisco ASR 1000 IOS XE Universal Image |
| FLASR1-AIS | License | Cisco ASR 1000 Advanced IP Services License |
| FLASR1-AES | License | Cisco ASR 1000 Advanced Enterprise Services License |

Pro tip: Bundle with Advanced Enterprise Services license for full MPLS/VPN firepower. Use Cisco’s configurator for exact BOMs.

## Competitive Edge and Final Thoughts

Against Huawei NE40s or Arista 7280Rs, the ASR 1006’s Cisco IOS XE reliability and service integration win. Ecosystem support? Unbeatable—TAC cases resolve fast, and resale value holds strong. It’s not the cheapest upfront, but TCO? Way lower thanks to scalability.

So, ready to aggregate like a boss? Hit up your Cisco rep, spin up a PoC, or [dive deeper on Cisco’s site](https://www.cisco.com/c/en/us/products/routers/asr-1000-series-aggregation-services-routers/index.html). Drop a comment—what’s your biggest pain point with edge routing? Let’s chat networks.

*(Word count: 1,128)*