3550 for Router?

Answered Question
Sep 6th, 2007
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Hello.

Many questions tonight.

I'm currently holding a faulty 7206vxr router. And I have a 3550-24 and a 355-12G, both with enhanced multilayer image. I'm thinking about replacing the 7206 with the 3550, and thereby I seek answers and advice. Customers. There are about 60 or so (let's say maximum 100) customers now on DSL and fibre. There are no routing protocols in use, I run a static route to my service provider, and my network is really small, so I've just set up static routes for everything.

throughput. None to speak of. I can imagine up to 30Mbit if I get 100 users, and they all use it;=).

Would it be a good idea to implement the 3550 based on the data I've provided? Or should one go for a thoroughbred Router?

I currently use no form for traffic shaping, since the router is somehow not routing anything more than 2-5Mbit, and It's only recently I've been adding fibre customers. Does the 3550EMI support traffic shaping both ways?

I'm a bit green at this, sorry.

Thanks,

Markraves.


Correct Answer by szahid about 9 years 7 months ago

Hi Markraves :

Actually , 3550 is a full blown router . Yes it does have some limitations when it comes to QoS ( wont do shaping ) , but other then that , it can run all routing protocols ( routing is disabled by default on a 3550 , so make sure to enable it by using a command " ip routing" in the global config mode ) . I would suggest to use 3550-12G instead of 3550-24 since 3550-12G has what is called as aggrgator SDM templates and bigger TCAMs for holding large number of routes and ACLs.


For all practical puposes , you should be okay with using 3550 for this type of environment.


Hope this helps.

thanks

Salman.

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Correct Answer
szahid Thu, 09/06/2007 - 12:52
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Hi Markraves :

Actually , 3550 is a full blown router . Yes it does have some limitations when it comes to QoS ( wont do shaping ) , but other then that , it can run all routing protocols ( routing is disabled by default on a 3550 , so make sure to enable it by using a command " ip routing" in the global config mode ) . I would suggest to use 3550-12G instead of 3550-24 since 3550-12G has what is called as aggrgator SDM templates and bigger TCAMs for holding large number of routes and ACLs.


For all practical puposes , you should be okay with using 3550 for this type of environment.


Hope this helps.

thanks

Salman.

markraves Thu, 09/06/2007 - 13:01
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Hi,

Nice nice, and nice.

So that very much answers my question.

Qos is no concern, since I do not offer neither iptel nor iptv. But since I do have a few fibre customers, it would be very nice to be able to use rate-limiting? Wouldn't want them to claim every bit of bandwidth.

Tanks again,

Markraves



szahid Thu, 09/06/2007 - 15:53
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You can do policing . One bit of caveat with policing on 3550 is you can only match / classify the traffic based on dscp ( upto 8 dscp values ) which should cover pretty much all traffic on the egress .




Thanks

Salman.


szahid Thu, 09/06/2007 - 15:58
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Sorry forgot to mention that the caveat applies only for outbound policers. For ingress policers , you can match based on dscp and ACLs. For egress , you can classify traffic based only on dscp and cant use ACL.


Hope this clarifies what I posted earlier.


Thanks

Salman.

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