Overview of Cisco ASR 1001 Router

Overview of Cisco ASR 1001 Router

The Cisco ASR 1001 Router belongs to Cisco 1000 series of aggregation services routers. The Cisco ASR 1001 Router comes with compact form factor that fulfills customer needs such as low power consumption and less usage of rack space. The Cisco ASR 1001 Router has the embedded services processor, route processor, and SIP integrated within the chassis with one half-height SPA slot.

By default, the Cisco ASR1001 Router comes with 4 GB of DRAM. For implementing software redundancy, a minimum of 8 GB memory must be installed on the router.

The Cisco ASR 1001 Router supports:

  • ESP memory: 1-GB DRAM default; 1-GB DRAM maximum
  • ESP bandwidth 2.5 Gbps to 5 Gbps of forwarding performance
  • Route-processor memory comes with 4-GB DRAM and can be increased to 8-GB
  • 4-Gigabit Ethernet small form-factor pluggable (SFP) ports
  • External USB flash memory 1-GB USB flash memory support

The Cisco ASR 1001 Router comes in a small form-factor chassis. The chassis contains a single integrated mainboard that implements all functions of the route processor (RP), a forwarding processor (ESP), a SPA embedded processor (SIP) and a built-in 4×1 GE SPA.

The SPA interface is connected to a built-in 4xGE SPA, one flexible integrated daughter card (IDC), and a single half-height (HH) SPA bay, providing additional SPA interfaces.

Cisco ASR 1001 Router hardware features include:

  • 4 GB DRAM
  • 8 GB internal flash
  • Console and Auxiliary RJ-45 ports
  • Supports 1 + 1 redundant AC or DC power supplies.
  • By default forwarding performance is 2.5G default and can be increased to 5G with software license
  • Front-to-back air flow, with 7 built-in cooling fans
  • A cover interlock prevents cover removal with power supplies installed.
  • Provides unique front panels for each integrated daughter card configuration.

The Cisco ASR1001 Router features slots for integrating different daughter cards including transceivers and voice cards. There is a top cover that needs to be removed for placing daughter cards.

The route processor is embedded on the mainboard inside the router that runs the IOS, manages the system, and performs all routing and control functions.

The ASR1001 uses SPA cards exclusively for interfaces. There are two SIP card models available: the SIP10 (up to 10Gbps of throughput) and the SIP40 (40Gbps of throughput).

When using these SIP cards, be aware of these restrictions:

  • The SIP10 can be oversubscribed up to 2:1; any further oversubscription will result in SPA cards being shut down by the system.
  • As the SIP40 provides 40Gbps of throughput, and the fastest SPA card is a 1 port 10GbE card, there is no way to oversubscribe the SIP40 at this time.


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