Cisco 800 Series Router

Answered Question
Aug 18th, 2012

Can you use one of the 4 switch ports that have 100 Mbps for your WAN connection?  I am pretty sure you can just want to be sure as I believe the 800 series specifically the 831 has only 10 Mpbs WAN port. 

Thanks,

Dave

I have this problem too.
0 votes
Correct Answer by edwin.summers about 1 year 7 months ago

Based on the spec sheet, the 851 has a 10/100 WAN interface:

http://www.cisco.com/en/US/prod/collateral/routers/ps380/ps6195/product_data_sheet0900aecd8028a9a9.html

However, having a FastEthernet interface doesn't necessarily mean the router can handle that much traffic.  The following sheet is old (2009) but gives an idea of relative performance under specified test conditions.

http://www.cisco.com/web/partners/downloads/765/tools/quickreference/routerperformance.pdf

On the 881 you cannot change the switchports to routed ports (and I assume the same is true for the 850).  You can set up VLAN SVIs for routing, and that may or may not work for you depending on what functions and services you plan to use.  Not quite the designed concept, but it may work.

Correct Answer by Paolo Bevilacqua about 1 year 7 months ago

For ethernet WAN, useas minimum Cisco 851 or 871 or newer. Other models are really really old.

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Average Rating: 5 (2 ratings)
Correct Answer
Paolo Bevilacqua Sat, 08/18/2012 - 07:29

For ethernet WAN, useas minimum Cisco 851 or 871 or newer. Other models are really really old.

dchristm09 Sat, 08/18/2012 - 08:35

Ok doesn't the 851 still only have an 10 Mbps WAN port?  I just want to make sure I don't lock myselft down to 10 Mbps for internet.  Can you use the LAN ports on this to route traffic out to the WAN?  I would be connecting this to an ASA 5505 on the WAN side.  This is just for home use too, why I am going a bit cheaper.

Correct Answer
edwin.summers Sat, 08/18/2012 - 09:28

Based on the spec sheet, the 851 has a 10/100 WAN interface:

http://www.cisco.com/en/US/prod/collateral/routers/ps380/ps6195/product_data_sheet0900aecd8028a9a9.html

However, having a FastEthernet interface doesn't necessarily mean the router can handle that much traffic.  The following sheet is old (2009) but gives an idea of relative performance under specified test conditions.

http://www.cisco.com/web/partners/downloads/765/tools/quickreference/routerperformance.pdf

On the 881 you cannot change the switchports to routed ports (and I assume the same is true for the 850).  You can set up VLAN SVIs for routing, and that may or may not work for you depending on what functions and services you plan to use.  Not quite the designed concept, but it may work.

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Posted August 18, 2012 at 6:26 AM
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