1760 Router Questions

[Hurricane Wheatbread]

Essentially, I've been studying for the CCNA and I've decided to purchase some older equipment to set up in my house so I can get some additional practice with the IOS interface. I've been looking at 1760 routers on ebay, and it seems like a pretty good place to start as I would like to actually use the devices in my current LAN, rather than simply setting up a lab.

My question is, could I take a 1760 and connect it to my cable modem, and then connect a switch (say a 2950 that I'll purchase a later date) to another interface? What add-in cards will I need to make this possible?

Here's a graphic representation of what I'd like to do.

If the 1760 isn't a good choice for this sort of setup, what would you reccomend? I'd prefer 100Mbit/sec capable routers if possible.

Thanks for the help/suggestions.

[lgijssel]

The 1760 only has one FastEthernet port which is a limitation.

Perhaps the 1841 is a better option, it has two times FastEthernet so you do not need anything else.

regards,

Leo

[Hurricane Wheatbread]

The 1841 seems a little cost prohibitive, as used ones are going for about ~$250. I'm not trying to build a real enterprise network, just get some time in with configuring IOS. The only reason I woule like a 100Mbit/sec router is because my downspead from my ISP is greater than 10Mbits/second and I'd like to take advantage of that if possible.

After closer inspection and lots of datasheet reading, it appears as though the whole 1700 series only supports 1 100Mbit/sec interface, even with ethernet WIC cards. So I guess it's back to the drawing board.

[lgijssel]

That's correct. Only WIC-1ENET is supported. Perhaps you can check on the 2600 series?

These are even older than the 1700 series and 2611XM/2621XM models also have two x 100Mb on board.

http://www.cisco.com/en/US/docs/routers/access/2600/hardware/installation/guide/2600ch1.html#wp1029882

The only drawback is they often come with small amounts of memory and flash.

You will probably need to buy that afterwards

regards,

Leo

[Hurricane Wheatbread]

The 2610s don't seem to be priced too terribly high, not all of them anyway. Prices seem to fluxuate between $30-$200. I'm sure it has to do with the amount of memory and flash as you mentioned. It's something I'll continue to research.

I found some renewed hope for the 1760 however. According to the following document, I could put a WIC-4esw in a 1700 series router and turn it into a 10/100 4-port switch.

http://www.cisco.com/en/US/products/hw/routers/ps221/products_data_sheet09186a00801c749d.html

Meaning, if I understand everything correctly, I could use the integrated 10/100 connection for my wan and then one (or more) of the additional 4 ports to connect to additional devices at the speeds I desire.

[lgijssel]

That's true. Please note the IOS requirements, you will need the mentioned version or newer.

Also, this module is not so common so it may be pricey.

Good luck with your search!

regards,

Leo

[fabios]

Taylor,

if you have a VLAN capable switch and proper IOS support, you can configure PPPoE client on a subinterface hence you can use the 1760 (or any other router) to connect to the ISP and route between VLANs.

This is my current setup:

interface GigabitEthernet0/1

no ip address

duplex auto

speed auto

!

interface GigabitEthernet0/1.4

encapsulation dot1Q 4

ip pim dense-mode

ip igmp query-interval 125

pppoe enable group global

pppoe-client dial-pool-number 9

!

interface Dialer9

mtu 1490

bandwidth 4672

bandwidth receive 480

ip address negotiated

ip nat outside

ip virtual-reassembly in

encapsulation ppp

ip policy route-map RM-loop1

dialer pool 9

crypto map CM-1

crypto ipsec client ezvpn witopia_IAD

As you can see I use a subinterface to do PPPoE client and have the Dialer 9 interface receive the public IP address then I route traffic to other dubinterfaces. I used to do that on a 1751 nd on a 1721 this is now a 1921.

You need to ensure the pppoe client on 803.1q subinterfaces is supported in the ios version you run and obviously that 803.1q subinterfaces are supported.

You can do all of that in the cisco feature nav.

Enjoy

Fabio

[fierypawn]

Hi Taylor,

Did you ever get this setup to work by configuring PPPoe between the 1760 and the DSL modem? I have th exact same setup.