I am curious if there is a design guide regarding Cisco recommended router make/model based on office size (small/medium/large) where the s/m/l relates to number of devices on the office network creating network traffic, i.e. users, servers, printers, voice, wap, etc..... (don't have numbers for these classifications).
I have a site where there they have approx 300 users/devices, with 4507 distribution sw, connecting up to a 2821 router with 4x T1's bundled (multilink 1).
The WAN connection is near 75%-80% utilize during regular business hrs. No qos currently running.
I'm concerned that, first - the 2821 router for this number of devices and bundled T1's is undersized. Second, seeing output drops on the multilink interface - which I understand could be related to wan congestion - plain and simple.
But we have another site, same scenario, but wan utilization is around 55-65% during reg business hrs - minimal qos is applied on the router multilink 1 interface, but output drops occur as well...even though i might see the multilink 5 min in/out around 50% or the ~6Mb bundle.
Looking for any cisco material that states whether the c2821 is ok, or whether Cisco would recommend another make/model for something of this size and traffic requirement.
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Those that come to my mind include:
Less serialization latency
No MLPPP processing overhead
No MLPPP bandwidth consumption
Less processing overhead for moving packet from/to Ethernet L2 frame to/from Serial L2 frame
Usually able to obtain, and quickly change, logical bandwidth caps on Ethernet hand-offs
Often able to obtain FastEthernet and sometimes GigEthernet hand-offs
Your 2821 might be okay up to about 20 Mbps (duplex).
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