Router suggestion

[akshaycjoshi]

Hi

I am looking for a router for providing internet access through leased line (16 MBPS) to around 500 people (300 concurrent).

Should support VPN and must have appropriate EOL and EOS.

Please advise.

[Reza Sharifi]

Hi,

You can use a 3945.  See table-7 in this link for all different models and spec

http://www.cisco.com/en/US/prod/collateral/routers/ps10536/data_sheet_c78_553924.html

HTH

[akshaycjoshi]

I can use even 7600 series router.

But the point is that, looking at my small requirement, do I need it?

[Leo Laohoo]

But the point is that, looking at my small requirement, do I need it?

Do you need what, exactly?  Do you need a new router or do can you use the old hardware.

The answer is "it's up to you".  If you have the funds, use the new router.  IF you don't, use the old router.

[akshaycjoshi]

I was looking for 1941 or atmost 2921.

Do u have any suggestion now ?

BTW I am asking for a new router.

[Leo Laohoo]

I was looking for 1941 or atmost 2921.

What attracted you to decide between the two?  What WAN speed are you expecting to have NOW?  What WAN speed are you expecting to have in the FUTURE?

[akshaycjoshi]

I already took care of it.

Right now they are having 8 Mbps connection).

Will 1941 work for me ?

[Leo Laohoo]

For an 8 Mbps link, 1941 will be more than enough.

[akshaycjoshi]

Will it be able to support 300 concurrent users ?

[Leo Laohoo]

Will it be able to support 300 concurrent users ?

This question is irrelevant.

The main question to ask is your WAN speed.  You can have 300 users and they can have 2 Mbps of WAN.  Alternatively, the same amount of users can have 75 Mbps (ideal).  If this is the case, then a 2951 would be sufficient to support up to 75 Mbps.   Refer to this link:  Router Performance Table.  This outdate document is considered as a "bible" among a number of us here when it comes to choosing which router is suited for a specific bandwidth.

[akshaycjoshi]

For 1941 router, 153.08 Mbps(FAST/CEF) is mentioned.

Does that mean it can support that much WAN speed ?

[Leo Laohoo · Accepted solution]

For 1941 router, 153.08 Mbps(FAST/CEF) is mentioned.

Sure.  If you measure the value of 153.08 Mbps in HALF DUPLEX and without any encryption.

If you want to know the value expressed in full duplex OR with encryption, then half the value (153.08 * 0.5 =  76.54 Mbps).  If you want to know the theoretical speed with full duplex AND full encryption then you take the full value and factor that by 4 (153.08 * 0.25 = 38.27 Mbps).

[akshaycjoshi]

So just a final question

As long as the WAN speed is less than 38 Mbps, 1941 can work for me, right ?

And the internet speed limitation would be only by WAN speed, i mean the processor would just be fine.

[Leo Laohoo · Accepted solution]

As long as the WAN speed is less than 38 Mbps, 1941 can work for me, right ?

Are you going to do encryption or not?  If not, then the WAN link can be around 76.54 Mbps.  If I want to play it "safe", I'd choose the lower value of 38.27 Mbps.

So if your WAN isn't higher than 38 to 45 Mbps, the a 1941 is a good choice.

AND, if you DO NOT PLAN to upgrade your WAN in the next, say 3 years, then the 1941 on a 38.27 Mbps WAN is a good choice.

[Joseph W. Doherty]

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Posting

You might find the attachment useful when considering different (current) ISR G2s and their performance for different services.