Cisco 1720 Router - Home Network Question

Hi i purchased this 1720 on ebay
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250614244197&_trksid=p2759.l1259

I Just want to ask how i will connect it to my network. Sounds stupid i am sure but i have over 40 TCPIP connections and alot of VLANS in my network and a few procurve switches as well, so i went from a RVS4000 Linksys business class home broadband router to this cisco. I have cable internet and am not sure how i will connect my WAN connection to this router / network. can someone tell me where i connect the WAN and how i connect back to the LAN 24 port procurve 1800 switch?

thanks
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mxrider_420Asked:
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Brain2000Connect With a Mentor Commented:
There is a 4 port 100MBit fast ethernet WIC, but it will only pass layer 2 (LAN) traffic at 100MBits between those ports.  For routed traffic (i.e. between internet/LAN), the 1700 CPU is limited to 10MBits.  Here's a snippet from Cisco's documentation:

"The WIC-4ESW switches packets between switch ports at line rates of 10 Mbps or 100 Mbps, including VLAN traffic. Inter-VLAN traffic and routed traffic that require processing by the host CPU are limited to 10 Mbps (full duplex), because the CPU Ethernet port is operating at 10 Mbps."

http://www.cisco.com/en/US/docs/ios/12_3/12_3x/release/notes/rn1700xc.html
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mxrider_420Author Commented:
will the WIC-1DSU-T1 module allow for broadband internet cable to be plugged in or do i need something different? thanks
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Brain2000Commented:
I fear you will not be able to use this router.  The WIC-1DSU-T1 module is for a T1 connection, not an Ethernet connection.  Your cable modem has an ethernet connection coming out of it.  You need a Cisco router with two FastEthernet modules, one to the cable modem, and one to the rest of the network.

Remember though that Cisco requires more expertise in terms of configuration.

I've never used the RVS4000 before, what about it was insufficient?
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Brain2000Commented:
You will need an Ethernet WIC.  Here is one on EBay.  Remember though, this is only 10MBits, so if your cable modem is faster than 10MBits/sec, then this will not give you full internet speed.

http://cgi.ebay.com/Genuine-Cisco-WIC-1ENET-Ethernet-Module-1720-1721-1760_W0QQitemZ350341533232QQcmdZViewItemQQptZCOMP_EN_Networking_Components?hash=item5191fb8e30
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mxrider_420Author Commented:
Is there one that is 100MBs? ...
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scott30134Commented:
The modules exist, but considering how old this router is and how little this router cost, I don't think you would want to invest in upgrading it.  A quick search for the parts you need looks like it would cost you a couple hundred dollars to add the modules you really want.  Cut your losses.  I know it kinda sucks that you just bought this router and it isn't what you needed, but I recommend you don't get too deep into it before you realize you could just buy another router that actually does what you want it to for less.  Be wise about it.  You can find Cisco 2600 series routers, which are much more robust that the 1720, for around $100-$200 on ebay.  Here is a 2620 with two fast ethernet ports for $119.99 Buy it now.
  http://cgi.ebay.com/Cisco-2600-Series-2621-ROUTER-TWO-FAST-ETHERNET-16F-64D_W0QQitemZ150410676715QQcmdZViewItemQQptZCOMP_EN_Routers?hash=item23052cc9eb

It has two 10/100MB fast ethernet ports - one for you WAN, and one for your LAN.  You can do a "router-on-a-stick" configuration with your existing switches to run all your VLANs.  I hope this helps you out.
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mxrider_420Author Commented:
Thanks. what is the next step up?... should i go to an 1800 series? whats the newest replacement? i assume 10MBS is okay. i have the shaw  cable highspeed internet plan in canada. heres the info on it...

http://www.shaw.ca/en-ca/ProductsServices/Internet/High-Speed/


and was thinking of upgrading to this but your saying it wont work with the 1700 series. so what do you suggest?
http://www.shaw.ca/en-ca/ProductsServices/Internet/Extreme/default.htm 
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Brain2000Commented:
Do you have the 7.5 plan or the 15 plan?  If you're on the 15, and the router can only go 10, then you're limiting yourself.

I agree with Scott, go with a 2600 series.  I'd go with a 2651, as they have a faster processor and are about the same price.  Here's one:

http://cgi.ebay.com/Cisco-2651-32F-96D-Router-Qty-Available_W0QQitemZ330417336146QQcmdZViewItemQQptZCOMP_EN_Routers?hash=item4cee686f52
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mxrider_420Author Commented:
does that one have the correct ewic post already installed?....
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Brain2000Commented:
Yes, that one has two 100Base Ethernet connections on it.
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mxrider_420Author Commented:
Sweet, so i can become multi hommed with this? awesome! thanks guys. Last question... does the 1700 series that i already purchased havea  web management interface?... im not one for CLI.
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scott30134Connect With a Mentor Commented:
You'll definitely need fast ethernet 10/100MB ports since you're doing VLANs.  Also, I'm not sure what you mean by "multi-hommed", but if you are thinking two WAN connections, that's not how they are typically used.  The two fast ethernet ports are typically used as one for your WAN connection and one for your LAN connection.  It doesn't have a built in switch, but you could find one that may have a built in switch or you could purchase a module to go in it.  Without seeing your config and/or the show version output, I can't say if the one you have has a web management or not.  Probably not.  On Cisco 1700 Series, Cisco SDM (Cisco's primary GUI for routers and switchs) is factory installed on the security bundles (K9) and optionally orderable on all other SKUs.  Even if its not factory installed on your router, you could still download it and use Cisco SDM if you're not a CLI type.  Pretty much all Cisco routers and switches support using Cisco SDM which gives you a GUI that runs from your computer and in essence sends the commands to the router or switch.  Read up on Cisco SDM at this link:
http://www.ciscosystems.com/en/US/prod/collateral/routers/ps5318/prod_qas0900aecd800fd11b.html
Hope this helps.
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petrus_ltCommented:
Moreover, even if you choose the 1720 solution, adding a WIC-1ENET 10Mb/s nic in it, you would still be limited: 1720s doesn't support vlans.

This feature was appeared in the 1721 model.

If you don't use SDM, there is still a small web server on cisco routers, "ip http server", that can be used. But it's still very basic and cli-looking.
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Brain2000Commented:
If by multi-homed you mean that you can hook in all the VLAN's to the router and route them as needed to the internet, then yes, you are multi-homed.  Or if you mean that you'll be hooked to two separate ISP's, well yes, it could do that type of multi-homing as well.

The web management interface is called SDM.  I'm not sure if you can just download from Cisco, or if you'll have to go out and find it.  It'll let you hook into routers and configure them from a web style of interface. For more info:

http://www.cisco.com/en/US/prod/collateral/routers/ps5318/prod_qas0900aecd800fd11b.html
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scott30134Commented:
The only caveats that I can add are: 1.  If you're talking muti-homed with two Internet connections, technically speaking, you can, but you wouldn't have anything for your LAN devices to plug into because the router only has those two ports.  As I previously mentioned, you could add a switch module for your LAN devices if you really wanted to use those two for dual WAN connections, but that's not typically how you would use them.  2.  On the SDM issue, read my previous post and see the link... For routers that did not ship with Cisco SDM preinstalled, Cisco SDM can be downloaded free of charge from the Software Center on Cisco.com.
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mxrider_420Author Commented:
I am okay with a 10MBs router (for now) the 1720 suggested it supported dotq trunking. i have 2 procurve switches and was only hoping to use the router for dhcp trunking for the separate subnet. your info is great and knowledgeable but im just a bit confused. forget multi homming, as per vlans i just want to make sure that i CAN do it with this equipment. if not then do you think the 2500 series is best for me? keep in mind i alreay have a 1700 series :S LOL
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Brain2000Commented:
Yes, you can hook to the internet at 10MBits and pass it to the switch.  When you said multi-homing, that usually refers to having two separate ISP's with BGP and OER for redundant incoming and outgoing links.  Usually used in a datacenter environment.

Don't get the 2500 series router.  They also have 10MBit ethernet.  Make sure you get one from the 2600 series.  Either the 2621 or 2651.

If and when you get the new router, if you have any trouble with it, post up the config in a new question and we'll finish it off for you :)
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mxrider_420Author Commented:
Thanks guys! I'll leave this post open till then. and ill be in touch, cheers.
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mxrider_420Author Commented:
http://cgi.ebay.com/Cisco-2651-32F-96D-Router-Qty-Available_W0QQitemZ330417336146QQcmdZViewItemQQptZCOMP_EN_Routers?hash=item4cee686f52#ht_1762wt_1167

I purchased this one. So i hope it can do the vlans and sub interface configurations i need it to. thanks everyone.
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scott30134Commented:
That one should work perfectly based on what you've told us you're wanting it for.  I hope everything works out for you.
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mxrider_420Author Commented:
How much security is on this device between the WAN to LAN?.. i mean the Linksys business class router i have now has SPI and a few other simple firewall configurations. is the router enough gateway security presence or should i invest in something else to sit between the switch and router?... please advise.
thanks
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scott30134Commented:
That's a matter of opinion and a matter of what you intend to protect.  Nothing is perfect security.  Moore's Law of Information Security states that information is considered secure if the amount of time and effort it would take to gain access to it is more valuable than the information.  So, the question is: How valuable is the information you're trying to protect.  Depending on how its configured, a Cisco 2651 is capable of pretty good security for a home network - at least as good as your Linksys Business Class, but if you're really worried about security, I'd recommend a Cisco ASA (if you want to stay with all Cisco equipment) or some other basic firewall, but now we're getting completely off subject from your question.  You might want to address this issue in another question posting.
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mxrider_420Author Commented:
Hi Again, how do i set up port forwarding on this router? it came in and i have it in hand now! :)
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Brain2000Commented:
As this goes outside the original scope of the question, I would recommend closing out this question and ask a new one beginning with a network diagram that shows the config that you will need.  Make sure to include VLANs on the drawing.
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mxrider_420Author Commented:
Hi,

Please explain to me what ports are used for configuring and what port here is the WIC 1 and WIC 2 and what one needs the broad band internet and one one goes to my switch?. i am very confused. Also what is the default IP of this unit when set to default and how do i connect to it?

thanks
CiscoRouter.jpg
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Brain2000Commented:
You configure it with the console port.
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mxrider_420Author Commented:
I want to configure it with SDM as discussed in thie thread earlier....
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mxrider_420Author Commented:
Also.... please advise me on how i connect my WAN cable modem to this. if you follow this thread it was suggested i purchase this item and now im lost and am not sure how to. do i need another module?...
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Brain2000Commented:
I would plug the ethernet from the cable modem into FA1/0 and another ethernet cable from FA0/0 to your internal network.
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mxrider_420Author Commented:
ok i have done that and set up DHCP on FA1/0 and LAN Ip on 0/0 how tdo i bridge them and set up DNS correctly? i need anything from LAN to exit out to the WAN port. what command do i issue? any computers on the switch can ping each other and from console on the router i can pint google.ca i just need to for lack of a better term 'bridge' the interfaces. how do i do this?,,

thanks
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Brain2000Commented:
At this point I feel we are heading far outside of the scope of the original question, which was to connect a 1720 to your network.  You are going to need an entire router config.
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mxrider_420Author Commented:
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