Why do we need to use ASR router instead of common router ?

Why do we need to use ASR router instead of common router in edge of network ? Any expert can explain it ? Thank you
eemoonAsked:
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Mal OsborneAlpha GeekCommented:
Unless this is a large, corporate network, you probably don't need anything that high-end. How many users do you have behind the firewall? What is your connection speed to the 'net?  Is your security requirement "commercial" or "military"?
AlexBlinovCommented:
Redundancy.
It has more than one routing engine so if one fails - other takes over.
Also the IOS (called XR-IOS) is much more advanced.
I will compare ASR with Windows  server OS (like 2012) and normal router with Windows 7.

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Brian MurphyIT ArchitectCommented:
There is a couple of ways to answer the question.

The quickest is out of a duty, integrity where your leadership has reason to believe it needs to be done.  The problem with this is integrity requires we question if this is the best and if needed at all.

Like someone stated prior, here recently I have worked on military solutions and that requires high level security Department of Defense access.  And trust me when I tell you I was put threw the ringer, finger prints, FBI Background check, a week of interrogations.  Fun times.

But, I'm expected to give the facts.  If you stick to the facts, direct and honest you have done your job.

I see this and think change is coming.  But sometimes people do things and have no idea what it does and have perceptions that are not real.  

This is a service provider model that would allow you to host solutions and services where your customers might have direct links, private links, MPLS, and so forth.

What it does is take all those B2B relationships and wraps a big circle around them and similar concept to Azure but a hosted solution when you have what they need.

A good example is a finance company that does automotive loans but not all the underwriting.  

What happens, or what I have seen is I've worked for companies that used routable IP address internal to eliminate NAT for everything and every partner had a dedicated pipe and having public IP space internal their connection terminates at a firewall but allows direct communication to a hostname that is only accessible across dedicated WAN connections.

It could be anything from a bank or underwriter is grabbing a file output from a Secure FTP server.

The worst scenario is to implement technology that is misunderstood.  

When they say Enterprise Wan the vision or deliverable is to create a WAN shared cloud concept.

So you could have 100 companies in that Enterprise Wan.  Where Extranet concepts failed, this claims to be a Enterprise Extranet.  Anyone in the Circle of Trust is connected by a dedicated mesh where they extend services into a protected Extranet to purposely have something that mitigates all the negative of using Internet where rules are defined, every company in WAN is a pool where instead of having a T1 or OC12 to your company, everyone connects to the WAN.  Otherwise, you have 100 companies and each one must have a dedicated connection to all 100 companies.  

Now you have 100 connections and each company now has access to 100 other companies instead of 100 connections to each company.  So 100 X 100 or 100 X 1.  

This is another network that all members of the circle share as if you were all in the same IP space and you can expose internal services but without exposing them to anyone but your business partners.  

It is like creating your own private Internet.  But in this case, your creating an internet to expose internal service offerings and you get to choose who uses your internet.  You get to make the rules and take Internet out of the equation.

So instead of AWS, Azure, or whatever that gives developers ability to expose anything and anyone can hit it or find it.

But to do that and all the other stuff it does, that is the facts.  If they understand that and create a design plan that uses the technology as intended it creates something that doesn't exist today.

Like a new Internet but you have to be invited otherwise you won't know it exists and it won't care if anything else exists.  

Otherwise, it is major overkill.

That is just a basic commentary.
eemoonAuthor Commented:
Thank you so much for your fast reply. I just found the document which state that the big difference is its bandwidth:

https://supportforums.cisco.com/sites/default/files/legacy/0/0/8/82800-ISR%20vs%20ASR.pdf
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