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Losing Default Gateway

Last response: in Networking
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July 8, 2013 7:12:36 PM

I just got my internet service back and since i did im having a connectivity problem. The internet will work fine for x amount of time then i will lose connection, my modem will lose all lights but the power and when i have static ip set it will erase my default gateway completely but leave the ip and subnet mask unchanged.

ive tried /release and renew and it didnt help the issue. i went and got a new modem and ethernet cable and it worked fine for about 2 hours and it started happening again. Starting to get frustrated please help!

More about : losing default gateway

July 8, 2013 8:00:02 PM

Windows IP Configuration

Host Name . . . . . . . . . . . . : Grizz-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : hsd1.il.comcast.net.

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : hsd1.il.comcast.net.
Description . . . . . . . . . . . : Atheros AR8121/AR8113/AR8114 PCI-E Ethern
et Controller
Physical Address. . . . . . . . . : 20-CF-30-AB-54-7A
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:558:6033:10e:6968:bc6e:c080:447f(Pre
ferred)
Lease Obtained. . . . . . . . . . : Monday, July 08, 2013 9:25:22 PM
Lease Expires . . . . . . . . . . : Friday, July 12, 2013 5:20:01 PM
Link-local IPv6 Address . . . . . : fe80::a8e3:22f0:ccbd:fb62%11(Preferred)
IPv4 Address. . . . . . . . . . . : 98.228.135.60(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.248.0
Lease Obtained. . . . . . . . . . : Monday, July 08, 2013 9:25:35 PM
Lease Expires . . . . . . . . . . : Friday, July 12, 2013 6:15:26 PM
Default Gateway . . . . . . . . . : fe80::201:5cff:fe24:bb41%11
98.228.128.1
DHCP Server . . . . . . . . . . . : 69.252.202.8
DHCPv6 IAID . . . . . . . . . . . : 287362864
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-15-99-0E-CD-20-CF-30-AB-54-7A

DNS Servers . . . . . . . . . . . : 2001:558:feed::1
2001:558:feed::2
75.75.75.75
75.75.76.76
NetBIOS over Tcpip. . . . . . . . : Enabled

Wireless LAN adapter Wireless Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 802.11n Wireless LAN Card
Physical Address. . . . . . . . . : 00-25-D3-14-14-5B
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.hsd1.il.comcast.net.:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : hsd1.il.comcast.net.
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Teredo Tunneling Pseudo-Interface:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:0:9d38:953c:1c9c:3546:9d1b:78c3(Pref
erred)
Link-local IPv6 Address . . . . . : fe80::1c9c:3546:9d1b:78c3%12(Preferred)
Default Gateway . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter isatap.{F878FEE4-D6EC-42D4-A75D-C8B2AD5E27F6}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
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Best solution

July 9, 2013 5:27:27 AM

Have had a similar problem at work with this. It sounds like the default gateway or "router" is not defined within the DHCP scope. Do you have a router or only a modem? I'm not sure how comcast works but it may be something that you need them to define on their end. If you do have a router there should be DHCP options in there and you would need to put the IP address of your router as the default gateway.
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July 10, 2013 4:37:06 PM

i only have the modem connected directly to the pc
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