Cisco 1000 Series Aggregation Services Routers (ASR 1000) vs. Cisco 900 Series Integrated Services Routers (ISR)

Based on my past and current experiences as a network engineer, they serve and run really well and also simplify our setup where we used them as edge or border or internet gateway routers. And also we used them as Data Center Interconnect, terminating dark fibers using LR or ZR SFP+. Even though they are well suited for enterprise network, there may still be some room for improvement with SRv6.

Incentivized

No problems with any of the Cisco 900 Series [Integrated Services Routers] (ISR) platform features within the enterprise environment. Because these devices are running a version of IOS-XE as opposed to traditional IOS, some of the more 'basic' configurations can become more complex. In the end, the 900 Series is still able to provide the required functionality, but there is a learning curve.

Incentivized

• Open standard routing protocols (OSPF, BGP)
• VRF Aware > allow us to segment each circuit per VRF instance.
• Port density depending on the model and customer needs.
• Easy to troubleshoot and configure.
• Support for sub-interfaces using VLAN tagging which allows to separate traffic at the logical level.
• High throughput.
• Support for open standard LACP protocol and Cisco own PAGP protocol.
• Route leak supported between VRFs.
• Redundant PDUs.
• Support for open standard AAA.

• [It] works great full-featured, but [I recommend a] small router for remote sites.
• [It] can handle more traffic than it even advertises!
• [It has a] well-priced option for smaller or less critical sites.

Incentivized

• The ASR 1000 series routers can, as with most devices, improve with additional memory capacity and upgraded chip sets for faster processing.
• There seems to be limitations on the number of routing sessions the smaller ASR devices can handle, which can be overcome with proper planning and placement within the network.

Incentivized

• [It has a] pay as you grow model of licensing, but, [in my opinion, is] a pain to implement.
• [The] service impacting license application [could be improved].
• Configuration complexity [could be improved].

Incentivized

The device without a doubts performs at the level required and expected, we can renew it and use it as we have been using it for years. The device can be used as DCI, IPN/ISN, or even private cloud for customer circuit handoff, it also supports IPSec properly. The device is well suited in multiple segments of the network.

All our modular contingency service exercises use this equipment, it allows us to perform this type of exercises very easily, in a controlled and effective way. It is used at least once a month for these types of events. It also allows configuration replication in computers that are under the same model.

Incentivized

We have received training on the equipment, which has made us add more networks on our own, we provide first level support, we validate the publication of the equipment and we can satisfy the needs of our internal clients in terms of the prompt recovery of the affected services

Incentivized

Implementation was as per design and all best practice configuration was followed.

Incentivized

We haven't used any other manufacturer other than Cisco. [H]owever, we have used different models that Cisco offers. The ASR has a little more horsepower than the ISR. Both are very good routers though.

Incentivized

I have similar feelings about the NCS 5500 Series Router. IOS-XR is great, but the need to upgrade components to support newer features seems like a planning oversight. 400G Linecards are great and needed.... but they need all new power supplies? Really? Also, the ability to use lags across multiple linecards would be nice. I'm pretty sure that's not available, but that is more understandable.

Incentivized

• It is a healthy return on investment with planned packed size data. Average unicast latency is low and consistent with small and large packets (barring mid-sized).
• Cisco devices last longer and also have a decent trade-in policy to recover some value when equipment is replaced.
• Higher concurrent IPSec tunnels are offered, we tested for 1500+, fielding both encrypted and a mix of encrypted and cleartext traffic.

Incentivized

• Lots of money saved in downgrading from less useful and older full-sized routers at small sites
• Time saved having to learn new commands (web GUI works great)
• Saves time training staff to manage them

Incentivized