Cisco 675 DSL Router - Max Clients

[BadThad]

I have a 675 on my home LAN that serves IP addresses and provides internet access for the 7 computers on the LAN. My problem is the 675 seems to max out at 5 clients. When I need web access on the 6th or 7th PC I have to release an IP from another computer in order for it to get access.

I looked at the spares documentation on this router and it doesn't say anything about max client support. Is there a way to setup my LAN so all 7 computers have web access without having to release an IP? Can I assign static IP's to my LAN PC's to fix it? Any other ideas? This is becoming a serious pain.

 

[FUBAR]

There is most likely something misconfigured in your cisco, unless you have some static IP setup, if that's the case then you may be SOL without a NAT device, which the cisco also does... but I digress.

Do you have some sort of static address setup? If you don't know, what is the IP address of one of your pc's (leave out the last octet if you wish)? Are you running your modem in PPP mode? If you don't know, look at the bottom of the modem, many times there will be a sticker stating how it was shipped to you.

I have seen both the 675 and the 678 working in 20-40 pc setups without glitches.... well, I should qualify that by saying no glitches that the other pc's or the ISP didn't cause.

Someone else will have to help you with the commands to do it, or RTFM, since I don't have one of these anymore... but you should check the DHCP pool status. You may have somehow limited the size or number of pools available... or if you bought it off ebay then it may have been done before you got it.

 

[BadThad]

Thanks for the reply.

There is no firm, static IP addresses assigned. The router "modem as my telco calls it" obtains an IP from my ISP. I leave the router on all the time so I don't think it changes, but I've never verified this. The router then appears to use NAT to assign IP's to the PC's on my network. Not sure if it's running in PPP mode? I will look for that sticker tonight. This router was given to me NEW from my ISP for my ASDL service. I've made no changes to it and they didn't supply instructions or software that would permit me to configure the router. I looked on Cisco's website and they don't tell you crap about it and I didn't see any utilities to download to configure it.

Wow...I am encouraged by your experience of having 20-30 PC running on one of these. There's hope.....

 

[FUBAR]

Sounds like you are using it in the same configs I was. You should be able to use the management cable to hook directly up to your serial port and the other rj-45 on the router, which is what it is. Then you can just use hyperterm to get console access, if they gave you any manuals on the thing (from cisco, if not they suck) then you should be able to find the settings. You need to have your 2 passwords for it, one for standard mode and one for enable mode, which is where the good stuff is.

I think you can type help or something to see the commands available and a brief description of what they do. I think you want to assemble something like "show dhcp pool" or show dhcp server.

As a last resort, you should be able to just set statics for always on pc's. Just use 10.0.0.1 as the gw, plug in your DNS servers off of another box and then use 255.255.255.0 as netmask. IP's should just be out of dhcp range for the cisco's server. I started statics at 10.0.0.100 and above.

Good luck

 

[Goosemaster]

Should work with up to 253(some number close to that) pcs

Anyways, shouldn't the gateway be set to 192.168.2.0 or something along those lines....that is the standard for provate networks...

It seems like your NAT might be working (OR NOT) but I agree with FUBAR....check the DHCP server that it is running..I assume it has some onboard config file or something(never worked with a cisco before:roll just as linux or any other router would have.

Check to see what the seetings are and see what the scope is......good luck

 

[BadThad]

Thanks for the info guys! I will try to make time to play with it this weekend. I think I might have a manual or something that came with the router. Guess I need to do some reading, lol.

 

[FUBAR]

Just info on the ip's stated here. By default the cisco products use 10.0.0.x for the default IP ranges. You can change it to 192.168.x.x if you want but it's a pain. Either one is a legal internal range.

 

[Goosemaster]

yeah, sorry about that....I just thought the standard applied...guess not...learned something new today

good luck