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How do I limit speed on an Internet connection shared between 25 vlans for Cisco hardware?
12-12-2012, 10:20 PM
Post: #1
How do I limit speed on an Internet connection shared between 25 vlans for Cisco hardware?
We are replacing a hodgepodge of equipment for a shared office space with Cisco equipment.
We have a 25 meg Internet connection that we want to share among 25 Vlans which will have 4 users per vlan. We want to give some vlans higher speed Internet than others. We have not purchased hardware yet so feel free to include hardware recommendations.
Thanks!

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12-12-2012, 10:28 PM
Post: #2
 
Buy some really shitty cables
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12-12-2012, 10:28 PM
Post: #3
 
Get another router and back-to-back T1 for internal use for the people who abuse the internet or the ones you dislike.

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12-12-2012, 10:28 PM
Post: #4
 
Is this 25 Mbps Internet connection synchronous (as in, 25 Mbps upload and 25 Mbps download)?

I suggest implementing CBWFQ (class-based, weighted fair queuing) , creating classes on a per-vlan, per-subnet basis, giving each a guaranteed bandwidth allotment via an outbound service policy on the physical interface facing the ISP. Also create service policy(s) outbound on the vlan SVI's on the multilayer switch facing the ISP designed to limit traffic rates as desired, but make sure to match against an extended ACL that doesn't match any LAN-side destinations, so you're not throttling internal rates when it's not needed.

That is probably sufficient, since there's no need to police internal LAN-side traffic to achieve this goal, so the normal best-practice of policing traffic as close to the source as possible isn't a huge concern here.
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