09-06-2015 03:28 PM - edited 03-08-2019 01:39 AM
I am using a 3750 with a router provided from Time Warner. I am unable to access the internet from any devices and I believe it is from the IP address changing on the router. How can I configure the switch to maintain the connectivity?
09-06-2015 04:12 PM
The ISP supplied router should do the NAT for you.
can you get to the internet if you plug a device directly into the router?
do your devices pickup an IP address from the router?
and what is the config of the 3750?
09-07-2015 06:04 AM
Thank you for your response and assistance.
I am able to access the internet with a direct connection and all devices receive an IP
On each fast Ethernet port I have created vlan 3 with switchport access.
gig1 is currently no switchport because I have been trying to follow other instructions that didn't work.
interface Vlan3
ip address 192.168.0.30 255.255.255.0
!
ip default-gateway 192.168.0.1
ip classless
ip http server
ip http secure-server
09-07-2015 08:30 AM
09-07-2015 09:48 AM
This is what I had set up before I made changes.
interface FastEthernet1/0/24
switchport access vlan 3
switchport mode access
!
interface GigabitEthernet1/0/1
switchport access vlan 3
switchport mode access
!
all of the fast Ethernet ports are the same. gig 1/0/2 is not being used so it is not configured.
09-07-2015 12:48 PM
Which interface of the switch connects to the Time Warner router?
If you connect a PC to one of the switch ports what IP address does it get? And what does it get as the default gateway address?
If you connect a PC to one of the switch ports can the PC ping the switch address of 192.168.0.30?
If you connect a PC to one of the switch ports can the PC ping the default gateway at 192.168.0.1?
HTH
Rick
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