I have just noticed this in the last couple of days. My router shows it with two IP addresses at the same time Anyone else seen this before?
722 pulling two IPs
- Thread starter stimpson
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Point your browser to the IP of the router and go to the status screen. On keyboard press PrtScrn (Print screen). Open Paint. Do a Control V or "Edit / Paste". Do a Save As, name it, and choose JPEG as the file format (It will be MUCH smaller than default BMP format), then attach it to post here.
IMHO, if the one MAC address of the 722 has 2 IPs associated, it is a malfunction of the DHCP service in your router. Perhaps a reboot is in order?
IMHO, if the one MAC address of the 722 has 2 IPs associated, it is a malfunction of the DHCP service in your router. Perhaps a reboot is in order?
Too bad the router doesn't show the lease terms. Perhaps one is an expired old address. The next thing to try is go to a command prompt and type: PING 10.0.0.3 followed by PING 10.0.0.6 to see which one (or both) responds.
In any event, since your 722 calls out , even if it had two IPs it should still be able to do so. (Dish doesn't call your receiver, and it couldn't anyway because a 10.X.X.X address cannot traverse the Internet and your router wouldn't Port Address Translate from its outside IP to the inside network by default).
In any event, since your 722 calls out , even if it had two IPs it should still be able to do so. (Dish doesn't call your receiver, and it couldn't anyway because a 10.X.X.X address cannot traverse the Internet and your router wouldn't Port Address Translate from its outside IP to the inside network by default).
How many
How many things do you have that connect to the net? You at least 1. 722, 2. PC. there is a 3rd device talking to the router. Is it a wireless and well as hard wired. In later case have you set up SSID on the unit. Also on the 722 you can menu 6-1-9 and check the network setting for it's IP address. Mine has a pretty standard IP address for wired unit.
How many things do you have that connect to the net? You at least 1. 722, 2. PC. there is a 3rd device talking to the router. Is it a wireless and well as hard wired. In later case have you set up SSID on the unit. Also on the 722 you can menu 6-1-9 and check the network setting for it's IP address. Mine has a pretty standard IP address for wired unit.
I have a Wii via wireless, PS3 and 722 connected with home plugs. How can you tell about what all is connected to my router.
After you ping the 722's two IP addresses, type "arp -a" in a command window and post the results. I just want to confirm that the router isn't confused, and that other devices agree that the 722 has two IPs assigned. The arp command will display the IP<->MAC (Ethernet) address mapping table.
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1 is a MAC prefix assigned to Intel. I would have guessed it was a PC with Intel motherboard. 00:08:89 is assigned to Echostar.
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1 is a MAC prefix assigned to Intel. I would have guessed it was a PC with Intel motherboard. 00:08:89 is assigned to Echostar.
After you ping the 722's two IP addresses, type "arp -a" in a command window and post the results. I just want to confirm that the router isn't confused, and that other devices agree that the 722 has two IPs assigned. The arp command will display the IP<->MAC (Ethernet) address mapping table.
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I get told that arp-a is not a valid command.
I don't know for sure, but I would think the HomePlug interface would have a different MAC address.
Strange. I still think it is the Router's fault. It has a table of IPs it can distribute, vs the MAC address of machines it has granted IPs -- it shouldn't allow duplicates. If you've moved the 722's cable from one port to another on the switch that might have confused the switch, but the DHCP service should not have been fooled. Many home routers have a 30 day DHCP lease default, so maybe in the future one will go away. Anyway, you've done yourself proud to notice the anomaly, and learn some basic troubleshooting skills.
Doing the Google "Netgear wnr3500 duplicate IPs" there are a few obscure hits on the subject, but the links I get don't have search. So, you may not be the first to experience this.
BTW, on a simple switched LAN, communications is by MAC, not IP. When you ping an "unknown" IP, the ARP protocol sends an Ethernet packet to all devices on the network asking "who the heck has IP x.x.x.x? When someone responds, you have his return MAC and can communicate with him. This information is cached in your PC, displayed by "arp -a" or arp -g), but it only stays in the cache for 2 minutes or so. When troubleshooting, keep that in mind.
Doing the Google "Netgear wnr3500 duplicate IPs" there are a few obscure hits on the subject, but the links I get don't have search. So, you may not be the first to experience this.
BTW, on a simple switched LAN, communications is by MAC, not IP. When you ping an "unknown" IP, the ARP protocol sends an Ethernet packet to all devices on the network asking "who the heck has IP x.x.x.x? When someone responds, you have his return MAC and can communicate with him. This information is cached in your PC, displayed by "arp -a" or arp -g), but it only stays in the cache for 2 minutes or so. When troubleshooting, keep that in mind.
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Thanks for the help. It's not hurting anything. I was just curious as to why. I was also wondering why the IPs are 10.x.x.x, and not the standard 192.168.x.x? It even states in the instructions and notes that 192.168.x.x is the default. Should I change these or leave it alone?
10.X.X.X is the private range for class A IP networks. 172.16-31.X.X are private Class B, and 192.168.X.X are private class C. Those IPs cannot traverse the Internet, so they are used when you want to put many PCs on the Internet when you only have one IP -- usually when you use Port Address Translation. If you go to WIMI.COM you will see your IP from your ISP (and a neat speed test).
169.254.X.X is the "APIPA" address, your PC will self assign it if it asks for a DHCP address and nobody responds. I see far too many folks who should know better not recognize it for what it is.
As for changing your IP, if it ain't broke, don't fix it! With 192.168.<third octet>.X class C you could only add 253 more machines on your network. With class A 10.X.X.X you can add 16.7 million. Just think of the possibilities!
169.254.X.X is the "APIPA" address, your PC will self assign it if it asks for a DHCP address and nobody responds. I see far too many folks who should know better not recognize it for what it is.
As for changing your IP, if it ain't broke, don't fix it! With 192.168.<third octet>.X class C you could only add 253 more machines on your network. With class A 10.X.X.X you can add 16.7 million. Just think of the possibilities!
Actually, I should clarify. With Class A you have 16.7 million possible hosts (256 * 256 * 256), but with Port Address Translation, since TCP and UDP port numbers are 16 bits long, you'd "only" be able to have 2 ^16, or port numbers 0 through 65,535, thus "limiting" you to 64,000 or so devices on your home network.
