WRT350N and Cable Modem Power Cycle

I have the cable modem and linksys router plugged into the same power surge. I noticed that I need to power up the cable modem first in order to register ISP info with my broadband service. If I powered up the router and modem at the SAME time(along with the desktop), my router does not configure the DCHP address on time, and my PC will not have Internet Connectivity. Internet Explorer web pages (including the default home page) will load very slow or produce an error after a while, and if you view your router Status page you'll see no Current Time available. At this time, I am forced to Release/Renew IP address and continually hit Refresh on the status page to regain Internet Connectivity and correct data(Time stamp, DNS, Domain name, Default gateway,etc....). It doesn't sound like a big deal, but what if you're not home and another user boots up my PC and sees no Internet connection? Manually renewing IP address info can become a hassle, when the router's DHCP service should automatically do this in the first place.
Now you have to use a specific Power Cycle, and write it down for guest users, when your network devices have been shut down. The cable modem has to be powered up before the router. This gives the modem some time to receive the proper ready lights on its LED status. Plugging the router in seconds later makes the reconnection occur smoother and automatically. As you can understand, this usually doesn't occur when you leave your network on for days, weeks, at a time.
This could be a specific ISP issue, but if your network starts up otherwise, please respond.

That status page has been configured many times. How many times do you think I've been in and out of that 192.168.1.1 interface? DHCP was enabled and automatic from the start, and the MAC address is cloned.
The time frame it takes for the cable modem to register ISP information and where the router accepts and implements those settings is where the problem lies. The 2 devices are not in sync if they are powered on together. Letting the cable modem initialize first makes the router authenticate the network settings better. The router obviously loses DNS settings when it is shut down or there is a power outage. I don't want to release and renew IP addresses every time the pc,modem, and router are powered on from a cold start. The other hassle is unplugging the modem for 15 seconds, replugging, then rebooting the pc, while others might constantly reset the router instead. Like I said, other guests/users might not know what to do in this instance. There are times when the network is shutted down periodically and a clean restart is needed unfortunately. Having a UPS back up would probably be a good solution.

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Upgraded to Maverick. Now cannot connect to wifi. All my other devices will connect. Have rest wireless hot spot switch and cable modem. Other devices still connect but MacPro does not. MacPro wireless is self assigning an IP address blocking access.

Upgraded to Maverick. Now cannot connect to wifi. All my other devices will connect. Have rest wireless hot spot switch and cable modem. Other devices still connect but MacPro does not. MacPro wireless is self assigning an IP address blocking access. It will connect if I connect to my iPhone hot spot via wifi. Any ideas?

If you follow this video you'll see how to delete your WiFi AP from the OS, this will allow you to select it again which I feel will correct your problem.
https://app.box.com/s/fe7v7h7kywjr23spumqp

SOLVED: Dropped connections with Time Capsule and cable modem/router

I've been dealing with random dropped connections for quite a while and I thought that it would be useful to share what I've found.
I was having a very puzzling problem where my internet connection would drop randomly on wireless devices. On my laptop, webpages would suddenly become unresponsive for a minute or two, Mail would have connection problems and complain, etc...but incredibly randomly and definitely not repeatable or in any pattern that I noticed.
I also have 2 Nest thermostats in the house which connect via wi-fi. I noticed that they would randomly show Offline very often when viewed from a webpage or iPhone app, but the Nest front panels showed that they were connected with a strong signal.
As I said, the dropped connections were very sporadic. Most of the time, everything worked, but every once in a while...bam.
I worked with the level 3 tech support guys at Nest for over a week to figure out what was going on. We went through settings on my router and Time Capsule and everything seemed proper and okay. I even replaced the Nests with new ones but still had the same problem. We were all completely stumped.
Yesterday, my laptop dropped it's connection at the same time my wife's laptop dropped hers. At this point, I wondered if something was wrong with the Time Capsule or maybe my internet provider.
I called AppleCare to see if they could help with debugging the problem. They passed me up to a senior wi-fi tech and he asked me many questions about the configuration of my network. My home network looked like this yesterday (see crappy diagram below)
                                                     Motorola Cable modem/router
                                                                             |
                                                       Netgear multiport switch
                                                      |          |         |         |          |
                                                     hardwired Macs,            TimeCapsule (bridge mode)
                                                     laser printers,                   |   |   |   |   |
                                                      Apple TVs                       laptops, Nest, iphones
This configuration seemed correct to me. The Time Capsule in bridge mode would mean that the cable modem/router would be handling DHCP so all the devices would be on the same network and I could print from a laptop to one of my printers and the laptops could connect to the hardwired Macs, etc..
The AppleCare technician said he thought that bridge mode was the problem. He mentioned that there was a known issue that in this configuration, the IP addresses could get lost between the cable modem/router and the Time Capsule. He said it would be best if the Time Capsule was in DHCP/NAT mode and the first device before the switch, this way the Time Capsule was the only device passing out IP addresses.
So I repatched my network like this:
                                                   Motorola Cable modem/router
                                                                             |
                                                   TimeCapsule (DHCP/NAT mode)
                                                            |                                       |   |   |   |   |
                                    Netgear multipart switch                      laptops, Nest, iphones
                                         |         |         |        |
                                           hardwired Macs,
                                             laser printers,
                                               Apple TVs
I can tell you that in the past 24 hours, I haven't seen anything lose a connection. Not even the Nests which seemed be on and off all the time. And, in this configuration, all the devices are on the same network and able to speak to each other.
I hope that helps someone.

So you're saying that Bridge Mode not functioning properly is a well known issue?
Not to me.. I have not had issues with the TC in bridge. And it is my prefered setup. I think it is better as a wireless AP and network hard disk than a router any day of the week.. but there are other ways to skin the cat if it is proving unreliable. I am at the moment using a wireless bridge from the Gen4 TC to a Gen4 AE upstairs for TV internet streaming.. it started off very reliable.. but of late I guess I need to reboot it every few days. And it has required a full reset two or three times.. although I probably need to take some of the blame for those. I am not over worried.. i do not believe in wireless bridges except for the most interim of arrangements.. it will be wired in ethernet ASAP.
Wireless should always be used in a way that respects its status as voodoo.. not stable technology. NOT SCIENCE.. it is more a bag of beads and rattles.
Is there a way to change the cable modem/router to avoid the double NAT problem?
The answer to this may depend on your ISP. Did they provide the modem? If so they may lock it down so you have no control. But normally a Motorola cable modem will not have a bridge mode as such but will have a method of turning off NAT.. (and wireless).. this amounts to the same thing.
Once you turn off NAT.. you need to power cycle the modem so the TC gets the public IP in router mode. The power cycle time might be 5min or 20min or overnight.. it again depends on your ISP.. but you need to stop the modem capturing the public IP so it can be passed to the modem.
Depending on where you are in the world.. US is most concentration of cable network.. you can go out and buy your own modem. Pick one on your ISP list and steer clear of SB.. at least with the apple routers they are problematic.
It also can be a case that the cable modem is SB model and therefore more problematic. Sorry I have forgotten the recommendation for what to buy. There are a number of posts here about it but search is terrible now. (or I am too old to figure it out). I will get Bob to poke his nose in and tell you what works for him.

Back to my mac and cable modem

I can't find a definitive answer to this question. Is there a cable modem that is compatible with Comcast that supports Back to My Mac?
Right now we have Comcast for business with fixed IPs, so I have just been using afp:// and vnc:// to access my home mac while on the road. But in the interest of saving $$$, I want to switch to Comcast for home, which doesn't offer fixed IPs.
The last time I tried (with Mavericks), I could not connect to any computer at home through Back to my Mac because the Comcast-supplied modem didn't support Upnp (Universal Plug and Play). A brief search could not find any cable modems that do support Upnp. Am I missing something, or should I give up on the idea?

Is there anyone out there who uses Back to My Mac (for sharing files and screens) and a cable modem? If so, how well does it work? Did you get a special modem or just the cheapest one that you could find?

Switching back&forth between Dialup and Cable Modem (Leopard)

Hey folks...I have a client who is using an iMac with Leopard (20inch titanium model from this year, 2gig coreDuo). She has cable modem, but cable service is very new to her area and thus never very reliable. For this reason, she's always had her Network preferences set up properly for both wireless and dialup. When her cable service drops out, she simply switches to dialup for a little while. The airport icon, top right of screen, can be clicked on to immediate access and choose between either of those configs. This always worked fine with Tiger, I set it up with her myself and it went swimmingly. Now that we've upgraded her to Leopard, her configs are still set up correctly, everything interfaces the same way, etc...however when she switches to the dialup method, it never connects. Nothing about the cable or dialup service has changed, and we only OSd in-place, so as i said configs and all relative information is exaclty the same. What do you think we need to correct or change? Thank you for any input!

good stuff!

Configuring Solaris 8 Sparc w/router and cable modem

I recently purchased a Sun Ultra 10 with Solaris 7
pre-installed. I decided to immediately upgrade to
Solaris 8. The operating system has installed properly
so far.
However, I'm at the point now where I am entering
information to allow Solaris to connect to my network
and thus the Internet, and the combinations I have tried
don't work.
I use a cable modem service with a Netgear RT314
four-port router. It functions in a standard way - the
cable modem is 192.168.0.1 and shows up on my
WinXP PC (in ipconfig /all) as the DNS server and
gateway server. On the PC, for "Connection-specific
DNS suffix", I see nc.rr.com (my ISP).
Solaris 8 wants to know my domain name, as well as
my DNS server. I don't know what domain name to give
it. I have tried nc.rr.com, but when I enter that plus
192.168.0.1 as the DNS server, I end up receiving this
message: ""Unable to find an entry for dchppc3 with the
specified DNS configuration."
I have been afraid to move beyond this point, although
it's possible that it will work properly and just isn't
receiving the confirmation it expects.
Any suggestions would be welcome, either in this forum
or emailed to me. My address is [email protected]
Thanks.

I decided to plow ahead with the installation. It works
properly within my local network - I can ping dchp
addresses and view Web files from my local server
using 192.168.0.3 (that machine's dchp address).
However, it can't get to the Internet. So my problem
now is that I can see the router, but can't see the
Internet services that the router provides to the other
computers on my network. Presumably, I need to
alter my DNS settings ... however, on my PCs, I seem
to simply use the router (192.168.0.1) as the DNS, and
it properly passes the request along to my cable modem
provider. Why would this work for the PCs but not for
Solaris 8? Thanks -

Cisco 2600 series router and cable modems

Hi everyone, I am just about to get started preparing for my CCNA... I am looking to pick up some used Cisco 2600 series routers to set up a home lab. I am wondering if it is possible to connect a cable modem directly to a 2600 series router? If so, do I need a certain type of WIC? I want to go from my cable modem, to a router, to my switch. Thanks in advance!

Hi,
Yes you can, using the Ethernet port on the cable modem, you can connect the cable modem to the router 2600, and the 2600 comes with builtin ethernet or fastethernet (according to your platform).
HTH,
Mohammed Mahmoud.

Accessing home mac fromwork through a router and cable modem

Hi - i'm really struggling with this - spent hours looking around net finding out how to set this up and as far as i can tell i've got it all set right - however it refuses to work.
I want to be able to access files on my home mac from work. Various ways of doing this i have read is SSH (or SFTP - Remote login) FTP Access or personal file sharing - tried them all can't get any to work so problem somewhere.
Have an NTL cable modem wired to a Netgear RP614 router which has Ip address A.A.A.A on its WAN port. It has B.B.B.1 on its LAN port. I have an airport base station acting only as a wireless access point (ie DHCP is turned off) router is allocating IP addresses - my ibook has B.B.B.3 - but have reserved this address for my iBook, ie it is as good as fixed as the router always gives my iBook this IP (using MAC address). Have port forwarded all necessary ports on the router, 22, 20, 21, 548 to B.B.B.3. Apple firewall is switched off - what am i doing wrong? I have also set the router to link to a DynDNS service to update its WAN IP everytime to my domain name i have set up.
If i try to FTP with transmit or fetch it doesnt work, if i try SFTP with fetch or transmit it doesn't work, and filesharing via connect to server doesn't work.
What am i dong wrong? How come everyone else can get this working but i can't?
cheers!!!

Right i tried my iBook connected directly to the cable modem and everything works then! Although one thing i did notice is that in the sharing windows in preferences at the bottom where it tells you how to connect to that particular service it didn't report the Ip address it reported a name - something like bcu-cu-cust36-bag-ntl.com - however when i looked this up it did resolve as the IP address reported by my network preferences.
So i'm not quite sure whats going wrong here - i'm gogin to try taking my airport base station out of the equation and hard wire my laptop to the router and see what joy there....

WISM Controller and 6500 Switch power cycled

Has anyone come across this issue where if the 6500 switch is reloaded or power cycled that 8 out of 10 interfaces on the WISM become administratively down this does not happen if you reload just the wism or power cycle the controller.
the softwear loaded on the switch is as follows.
Supervisor Engine 720 10GE with f/w 8.5(2) and s/w 12.2(33)SXH
WiSM WLAN Service Module with f/w 12.2(14r)S5 and s/w 12.2(33)SXH
any suggestions as to how to sort this so it loads all the interfaces as up from the power cycle or reload of the switch would be welcome have already made sure the config is saved but still happens.
Jeremy

1. I believe a 6509 can handle 5 WiSMs, though I've found 4 more realistic when considering the need for uplinks and service modules.
2. Based on 5 WiSMs, you can have 1500 per chassis. Again, I tend to stick with 4, or 1200 APs per chassis.
3. There is no hard limit that I am aware of. WCS on a VERY high-end server can handle ~2500 APs when running Linux WCS. As with the above, this works well with 1 WCS per 2 chassis if each has 4 WiSMs.

Trying to connect iBook to internet via Airport, iMac G5, and cable modem

The iBook says it's connected to the G5's local Airport network, but Safari says it's not connected to the internet. I must be missing a setup step, but have no idea what.
This is my first use of Airport other than using the iBook at Wi-Fi spots.
Any suggestions? Please and thank you!
iBook G3 Mac OS X (10.3.9) iMac G5, OS 10.4.8

Do I need an Air Port Base station or a router? After I set up everything on my mac mini, what steps do I need to follow on the iBook to get Internet access?
The AirPort base station is a router. You are not limited to AirPort base stations as non-Apple 802.11g routers (like those from Belkin, D-Link, or Linksys) will work just as well. Using a router, your network configuration would be something like the following:
Cable modem > (Ethernet cable) > [WAN] router > (wireless) > wireless computers.
The set up for both computers, to access the router, would basically be the same.
To setup AirPort for High-Speed Cable Internet connectivity:
System Preferences > Network > Show > Network Port Configurations
- Verify that an AirPort option exists. If it does not, click "New" to create one. (Note: If you are unable to create an AirPort configuration, the AirPort card in your computer either doesn't exist or it is not recognized.)
- Verify that AirPort is "On" (checked)
- Verify that AirPort is at the top of the list. If it isn't, you can drag it to the top.
Systems Preferences > Network > Show > AirPort
AirPort tab
- By default, join: Automatic
TCP/IP tab
- Configure IPv4: Using DHCP
- Configure IPv6: Automatically or Off
Proxies tab
- Configure Proxies: Manually
- Select a proxy server to configure: <All proxies should be unchecked unless you specifically require a proxy for Internet access.>
- Exclude simple hostnames (unchecked)
- Bypass proxy settings for these Hosts & Domains: <leave blank>
- Use Passive FTP Mode (PASV) (checked)

Fios and cable modem

For my home office.
My IT department is telling me I need a standard cable modem line because fios isn't supported by our VPN solution. They can't put fios in to bridged mode.
Do I need to cancel the fios or can a cable modem be added. I love fios.
Solved!
Go to Solution.

I point to http://www.dslreports.com/faq/16077
and as need be, see http://www.dslreports.com/faq/16858
If you are the original poster (OP) and your issue is solved, please remember to click the "Solution?" button so that others can more easily find it. If anyone has been helpful to you, please show your appreciation by clicking the "Kudos" button.

Connecting Cisco 2821 Router, Switch, and Cable Modem

Hey everyone,
I am currently in the Cisco Network Academy at my school and just finished CCNA 1. I have a few questions though.
I am purchasing new equipment and that equipment includes:
1-Cisco 2821 2-port Gigabit Router
1-Linksys SE3016 16-Port Gigabit Switch (unmanaged)
1-Cisco WAP4410n Wireless Access Point
1-Motorla SurfBoard Gigabit Cable Modem (no router built in-Just standalone Modem used with Comcast Xfinity High Speed Internet)
1-12U Network Rack (not enclosed)
I am confused on how I will connect the cable modem to the router and the router to the switch and the WAP so that I still have WiFi. Since the router only has 2 Ge Ports, how would I cable this up?
If my assumptions are correct, would I do the following set up?
Take the Cable Modem and run a Straight Thru to Port 1 of the Router.
Connect the Switch Port 1 to Port 2 of the Router using a Straight Thru cable (I believe I will most likely have to Subnet a network, won't I?).
Connect Switch Port 2 to WAP using Straight Thru Cable (so I still have WiFi in my home).
Connect all my computers and other devices to the Switch (this includes several PC's/Laptops, two printers that are ethernet, two TV's that are ethernet, an AppleTV and a Blue Ray Player that are both ethernet, and some Cisco Powerline Network Adapters).
Will that set up work?
Also, how would I configure the router to work with my cable modem AND act as a DHCP Server so that all of my devices get IP Addresses? I have the Cisco Command Guide Book, but it is confusing to me as of now.
Thanks!
Chris

A good start but a few points I would make.
If you set the clock manually, you may find it resets itself after a router reboot. I would look at pointing it at an NTP server:
#ntp server x.x.x.x
#clock timezone GMT (Assuming you are UK based)
Although not required, I would put a description on each of the interfaces as it may help identify them later if you are not physically in front of the Router.
#interface gi0/0
#description WAN
Same for LAN
You have set up your LAN subnet with a /16 subnet mask which is effectively 10.0.0.1 - 10.0.255.254. This is a large subnet allowing over 65k hosts which is not best practice on enterprise networks. It probably won't cause you any issues but I doubt you will have any more than 254 hosts so personally I would use a /24 subnet (255.255.255.0)
The only major thing missing is NAT which needs to be configured on the router to translate the LAN IP addresses from their 10.* private range to the Public IP address on the Gi0/0 WAN Interface.
Firstly you need to define the 'inside' and 'outside' NAT interfaces which is fairly self explanatory:
#interface gi0/0
#ip nat outside
#interface gi0/1
#ip nat inside
Gi0/0 is your outside interface because its facing the Outside world (i.e the internet) and Gi0/1 is your inside interface because its facing Inside your LAN.
Then you need to tell the router which addresses to translate against by first creating an access list:
#ip access-list standard LAN-Addresses
#permit 10.0.0.0 0.0.255.255
Finally you need to tell the router to start translating:
#ip nat inside source list LAN-Addresses interface gi0/0 overload
Oh, I have just noticed that you do not have a 'default route' configured. A router forwards packets by first looking up the destination IP address of the packet (i.e where its going) in it's own routing table. Obviously home routers are not going to have an entry for every Public IP subnet on the internet so they use something called a default route which effectively says 'If I cannot find an entry for this packet in my routing table, use the default route'.
As you are on DHCP and your IP address (and even default gateway) could change on your WAN interface, I would not bother with the next hop address in the default route but rather use the outgoing interface as below:
#ip route 0.0.0.0 0.0.0.0 gi0/0
Hope this helps!

Hook together chromebook,printer,router and cable modem

how do i hook up with cables to just the charter internet,and hp 3052a printer using a belkin 750 router and using hp chromebook 14 to type messages with?need to know what cables to hookup to printer,router and charter modem to get them all in sync.

Hello bozza,
Welcome to the HP Support forums. I understand that you would like to learn how to setup your Deskjet 3052A printer so you can print from your Chromebook.
The cables we need before starting is to have everything powered on. You also need to have an ethernet cable running from your modem to your router. And that will be all the cables we need.
Your Chromebook requires any printer to be set up with HP ‘s ePrint feature or Google Cloud print. Your Deskjet can do both but we first need to connect the printer to your wireless network. I have included a link to a post by Jon-W that has the steps on how to do this. Please start where he says “There is another alternative …”
Now that the printer is connected to your wireless network, let’s get the printer’s ePrint feature set up. Please follow the steps in Getting the Printer Claim Code. Once you have your web services information sheet please follow the instructions on Setting Up a Custom Email Address for ePrint.
Now that the printer has a customized ePrint email address please follow the steps in Using Google Cloud Print with your HP Printer to get the printer set up with Google Cloud Print. I have also included the Print a Page document from Google for additional reference.
You should be able to print from your Chromebook to your Deskjet 3052A printer.
Regards,
Happytohelp01
Please click on the Thumbs Up on the right to say “Thanks” for helping!
Please click “Accept as Solution ” on the post that solves your issue to help others find the solution.
I work on behalf of HP

Basic home network setup troubles: Airport, ethernet, and cable modem

Hi,
Having only just subscribed to a cable broadband service we're experiencing some troubles setting up a mixed-mode home network and I'm wondering whether we've got some of the very basics messed-up.
What we have is:
1. Recent version (white) ibook, with airport, running 10.4.7;
2. Old G4 PowerPC (450MHz I think) running 10.4.7 ... airport card available;
3. Old powerbook (?Lombard) running 10.2.8 ... no airport;
4. A PC running Windows XP (not that important to have this in the network though) with no wireless;
5. A 3com SuperStack 1100 switch;
6. A cable modem;
7. A Linksys BEFSX41 Etherfast Cable/DSL Router ... 4 ethernet switch ports;
8. An airport express base station;
9. An HP laser printer connected into the ethernet LAN.
We'd like to keep both our wireless and ethernet networks running with all computers able to access one another, print to the laser printer, and access the broadband (fixed IP address) account. We're not (yet) conderned with hosting websites from our home computers.
I'm unsure of how we should configure this system. Do I connect the airport base station to the switch (which is what we presently have) or into the router? Do I connect each of the hardwired PCs (and the printer) into the switch
and then the switch to the router via single conenction?
If we use DHCP to access the router have I got the potential for the router and the airport base station to interfere with one another?
Any advice would be greatly appreciated. I've pulled a few TCP/IP setup-for-idiots books from our local library but this specific situation doesn't seem to be well covered.
Cheers
Dougal

You probably have a few options here that will work. Considering the number of wired devices, I would suggest the following:
Cable modem > (Ethernet cable) > [Internet port] BEFSX41 [LAN_1] > (Ethernet cable) > SuperStack switch > (Ethernet cable) > [Ethernet port] AirPort Express Base Station (AX) > (wireless) > wireless clients, AND
SuperStack switch > (Ethernet cable) > wired clients
Then setup the AX as a bridge, as follows:
To set up the AirPort Express Base Station (AX) as a bridge, using the AirPort Admin Utility, connect your computer directly (using an Ethernet cable) to the Ethernet port of the AX, and then, make these settings:
Network tab
- Distribute IP addresses (unchecked)
- Apply the new setting.
- Wait at least 5 minutes.

DHCP not expiring and unit needing power cycling

I've had my AirPort Extreme N gigabit router for about two days now and am having several issues. I upgraded to the 7.2.1 firmware, but that didn't help. I've noticed that DHCP leases, after expiring, aren't releasing and therefor aren't allowing DHCP devices to reconnect. The only work around for this has been to blow out the DHCP lease window exponentially. Secondly, are the activity lights for the lan ports on the back of the Unit supposed to remain on? Mine keep turning off and I have to power cycle the unit to get them to come back on...before they turn off again. I've also had issues where Gigabit Ethernet cards cannot make connections until I reboot the unit. Also, how warm should this device be?
Message was edited by: kionysus

Thanks for the replies,
I have already tried a full power cycle before posting, should have made that clear in my first post, sorry. Straight after the power cut, I shut everything down for 10 minutes, and then powered all device up one by one.
Also, I just tried changing the beginning address from '192.168' to '10.0' and this made no difference to the issue.
When trying to get an IP address through DHCP, I receive;
IP '169.254.117.112'
subnet mask '255.255.0.0'
and empty router field
which is extremely strange, as I used to get a subnet mask of '255.255.255.0' and the router's IP has not changed since getting the TC.

WRT350N and Cable Modem Power Cycle

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