cisco router and switch setup with cable modem 1

[masternige]

Hi folks,
I am due to start studying for my "ccna" in a week or so and i have bought myself some hardware to help me.
2 x 1603r routers
1 x catalyst 1900 series switch
1 x blackbox
1 x cable modem
I have 4 computers on my lan.
This is what i tried i connected the blackbox to the back of my router giving me 2 x ethernet ports.
I connected the ethernet cable from my cable modem to the blackbox.
I connected an ethernet cable from the 10 base port on my router to my 1900 series switch.
I then connected ethernet cables from my switch to all of my pc's.
I do not have internet access from any of my pc's now.
I believe this is because i am connected from a 10base port on my router to my switch which simply is not fast enough.
I would like it if someone could confirm this for me please.
Should i of bought a broadband cisco router instead of a 1603r router?
I have asked so many questions on so many forums people keep telling me i need this and that i just dont have a clue anymore.Originally i bought my cisco routers off ebay the chap told me it would be good enough to practice for my ccna,i was then told i needed this blackbox to give me another ethernet port, Well time is running out fast as my course starts in about a wk and i would like to be set up by then,so if anyone can advise me it would be great.
Best Regards Nige.

 

[kwing112000]

I think there is more to it than just plugging it all in. The speed of the port has nothing to do with the connection to the internet. Your intenet is most likely only 5 or 6 meg. At 10 base T port is more than that. i am sure you will have to set up the router. Also if you had other equip plugged into the cable modem before then you will need to reboot it. I think alot of them work on MAC addresses.

 

[burtsbees]

The Catalyst 1900 switches are basically useless for studying for the CCNA. The 1600 series routers are pretty old, too. If I were you, I would get three routers and three switches. The best switches to get to study (which will also help with CCNP) are Cat 2950's, but 2924 or 2912's would do. For the routers, I highly recommend 2600's (2620 or 2621 with decent IOS images). You can get 2500 series, but keep in mind that in order to do intervlan routing, most of the time fast ethernet interfaces are needed, and 2500's cannot do this at all. I would recommend a Cisco 2503 and two 2621's, as the 2503 can also be configured as a frame relay switch. You would need WIC-1T (NOT to be confused with T1 WICs) cards, one for each 2621.
As far as connecting to the internet via this black box and 1600 combo, you definitely need things like a default route and other static routing minimum in the router.

Burt

 

[masternige]

Hi thanks for your replys can you tell me if you think a Cisco Catalyst 2948G Switch is any good.
Regards Nige.

 

[burtsbees]

It's a decent switch, but I suggest three switches and three routers so you can put them in redundant configurations and see how things like spanning tree protocol and OSPF across nbma networks like frame relay work, what happens to routing tables and routing updates when a link goes down, etc. One switch by itself is useless to see how things happen.

Burt

 

[masternige]

Yes thanks again I am working on getting 3 of each i have bought a Cisco Catalyst 2948G Switch which you said was a decent swith to practice the ccna.Now I have been looking at the routers the 2620 and the 2621 just reach out of my price range would a 2610 be ok. Allso you said
"You would need WIC-1T (NOT to be confused with T1 WICs) cards, one for each 2621." Can you tell me why I would need this please.Do you think if i gave you an ebay link you would take a look and give me your opinion on wheather it had all i needed?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=300166357353&fromMakeTrack=true

and this one

http://cgi.ebay.co.uk/Cisco-systems...ryZ73321QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

I know its cheeky but when your stuck your stuck.
Regards Nige.

 

[burtsbees]

Well, the problem with 2610's and 2611's is that you need the right image to do intervlan routing (router-on-a-stick), which is a big part of CCNA. The 2610 has a much better image than the 2611 in those links. With switches, you really only need one ethernet/fast ethernet interface for CCNA/CCNP. I am not 100% sure the 2948G's are configurable like the 2950's, but should still do. Try to acquire the CCNA lab books, and you will see exactly what you need.

Burt

 

[masternige]

Hi you are full of info,while browsing the net for info I came across the cisco 800 series router

http://www.petri.co.il/cisco-800-series-routers.htm

It has 3 fast ethernet ports and a wan connection.It dont have a serial connection though and i can not find what ios version it has.But that got me thinking I dont think it would need a serial connection as I could use a fast ethernet port in to a switch right?
Or directly in to another router which ever am i right?
And i could go wireless.What do you think to that.?
Nige.

 

[burtsbees]

The 800 series are broadband routers that have one true ethernet interface, which has four fastethernet switchports as part of the ethernet interface. The can be no layer three configuration on the switchports, so to answer your question...no.

Burt

 

[masternige]

Ok here goes I have now got a 2950 switch,Which is good.You said i could get away with buying a 2610 or 2611 router for intervlan routing which is more in my price range so long as it had a decent image.So what do you call a decent image? Would I be ok with any image that was say 12 and above.And can you tell me why a router needs a fast ethernet port?
Cheers Nige.

 

[burtsbees]

The router does not necessarily need a fast ethernet port from what I have heard, but I have never tested this theory. Intervlan routing need to operate in full duplex, and in most cases, unless the image is advanced, the ethernet (10MB) will only operate in half-duplex.
Here is a good link to see what certain images will/will not do...

http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp

Burt

 

[burtsbees]

If you search for the features, you can see that for the 2610/2611 platform, you need at least 12.2(8)T, but I am still not sure that these things will do what you want.
For SDM support, you need the XM series, too, which are a bit more pricy (for 2600's, anyway). There is a router sim solution that actually loads an image on your computer, and uses features from it...I hear the sim is free, too...it's called DynaMips, but I have never researched it.

Burt

 

[masternige]

Hi,
I suppose the first thing i want is to be able to connect all my pc's with internet access to all, using cisco equiptment.When I bought my first cisco router which was the 1603r i was under the impression I could just plug my cable modem in to the ethernet port and connect the serial port using an adapter to either my pc or a switch which would give all of my other pc's internet access.But one thing leads to another and before I know it I have a thousand questions I need to ask.So I ask myself what do I want? I still want the same thing.Once I have managed to connect a router to my cable modem and have internet access to my pc through it,I think then I could start to consider other things like what router will perform what job.Do you know of any decent tutorials any where that would enable me to acheive this.
Best Regards Nige.

 

[burtsbees]

But do you want to study for the CCNA with real routers and switches also? With what you have, depending on the cable modem it is, you may be able to have the cable modem connect to a router like the 1605 in passive mode, and have the router do the PPPoA negotiations (if cable requires that) and do the NAT as well. Good practice would be to set all four pc's in different VLANs, so you would need a router capable of intervlan routing. I have adsl, so I don't know about cable...I was hoping that by now someone else would jump in. My set up is as follows...
2620XM with a WIC-1ADSL for dsl connection, NAT/PAT, vpn server, static routing, all in the config of the 2620XM, and a WIC-1T connected to a 2503, which I have configured as a frame relay switch. On the other side I have three 2620's, the first connected via serial to the frame relay switch (2503), and the other two connected withWIC-T1 wan cards and other asynch serial cards (WIC-1T), and I use backup routes (floating static routes), OSPF routing and EIGRP. The routers are all in a triangle, and the last connects to a CAT 2924, which is connected with dual trunks to two other CAT 2924's, doing spanning-tree and VTP. In separate VLANs are my printer, my ftp server, and my regular pc, and sometimes my laptop, which I set the switchport for port security. My next project is getting Cisco Call MAnager, setting up a server for it, and some IP phones, for VoIP practice, and VoFR.
I will try to locate other threads concerning connections to a cable modem...I do know that it should be in passive mode if you plan to NAT with the router. Otherwise, just have the modem NAT and set the ethernet port connecting to it for dhcp like this...
router>en
router#conf t
router(config)#int e1 (if this is the one that connects to the transceiver, or what you call the "black box")
router(config-if)#ip add dhcp
router(config-if)#exit
router(config)#ip route 0.0.0.0 0.0.0.0 (IP address of cable modem goes here).
Then set up the routing---I would try eigrp, since the modem is the edge device...you need two separate networks, or subnets...like the one for the connection to the cable box...let's say that is 192.168.1.0/24, so you can make the ethernet interface connected to the 1900 switch 192.168.2.0/24...
router(config)#int e0 (if this is the LAN interface...)
router(config-if)#ip add 192.168.2.1 255.255.255.0
router(config-if)#no shut
router(config-if)#exit
router(config)#router eigrp 69
router(config-router)#net 192.168.1.0 0.0.0.255
router(config-router)#net 192.168.2.0 0.0.0.255
router(config-router)#exit
If that does not work, then we can have the modem do the negotiations (passive or bridge mode), and the router do NAT. Let me know. Also, on the ethernet interface that connects to the modem, do the "no shut" command on it as well.

Burt

Burt