switch with different VLAN

nexusxox · 05-19-2008, 05:30 PM

A workstation connected to a switch that seem to have two different vlan cannot access the internet. If some users can and the others cannot is the issue in the switch, the settings or something in the firewall or router

makemorebeer · 05-20-2008, 10:05 AM

i'd put my money on the switch settings. is it a managed switch. are all users able to get to the internet on the same vlan. are all users unable to get to internet on the same vlan. have you setup default routes on the switch and all workstations. have you verified that cross vlan compatibility is not causing an issue? (i.e. can you ping from one vlan to the other)

Tekmazter · 05-22-2008, 04:53 PM

I need a little more information here. When you say some users can connect and others cannot, do you mean some users in the same VLAN as the machine that cannot connect to the internet CAN connect to the internet?

If the workstation is on the same VLAN as other machines and cannot connect while others can, then you should start looking at your switch port config etc... however, if this is the only machine on this second VLAN I would look at your VLAN config and static/RIP/OSPF routing (whichever you're using)

Also, what type of switch is this? CISCO i could probalby help ... 3COM, ProCurve, Extreme, not so much.

nexusxox · 06-03-2008, 10:08 AM

Looks like a case of the subnet missing however if you only have the ip address do you know what the subnet would be.

10.10.3.6/27

/27 represents the number of octets in the subnet

Eight 1’s equals 255 (128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 = 255)

/27 = 11111111.11111111.11111111.11100000

Broken down:

/27 = 11111111 - 255

11111111 – 255

11111111 – 255

111 (128+64+32= 224)

0 = 0 always

So your address is 10.10.3.6 subnet mask 255.255.255.224

05-19-2008, 05:30 PM	#1 (permalink)
nexusxox Registered User Join Date: Apr 2007 Posts: 73 OS: platform x	switch with different VLAN A workstation connected to a switch that seem to have two different vlan cannot access the internet. If some users can and the others cannot is the issue in the switch, the settings or something in the firewall or router

05-20-2008, 10:05 AM	#2 (permalink)
makemorebeer Registered User Join Date: May 2008 Posts: 7 OS: xp	Re: switch with different VLAN i'd put my money on the switch settings. is it a managed switch. are all users able to get to the internet on the same vlan. are all users unable to get to internet on the same vlan. have you setup default routes on the switch and all workstations. have you verified that cross vlan compatibility is not causing an issue? (i.e. can you ping from one vlan to the other)

05-22-2008, 04:53 PM	#3 (permalink)
Tekmazter Registered User Join Date: May 2008 Posts: 95 OS: XP / 2K3 / RHE / HP-UX	Re: switch with different VLAN I need a little more information here. When you say some users can connect and others cannot, do you mean some users in the same VLAN as the machine that cannot connect to the internet CAN connect to the internet? If the workstation is on the same VLAN as other machines and cannot connect while others can, then you should start looking at your switch port config etc... however, if this is the only machine on this second VLAN I would look at your VLAN config and static/RIP/OSPF routing (whichever you're using) Also, what type of switch is this? CISCO i could probalby help ... 3COM, ProCurve, Extreme, not so much. Last edited by Tekmazter : 05-22-2008 at 04:55 PM.

06-03-2008, 10:08 AM	#4 (permalink)
nexusxox Registered User Join Date: Apr 2007 Posts: 73 OS: platform x	Re: switch with different VLAN Looks like a case of the subnet missing however if you only have the ip address do you know what the subnet would be. 10.10.3.6/27 /27 represents the number of octets in the subnet Eight 1’s equals 255 (128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 = 255) /27 = 11111111.11111111.11111111.11100000 Broken down: /27 = 11111111 - 255 11111111 – 255 11111111 – 255 111 (128+64+32= 224) 0 = 0 always So your address is 10.10.3.6 subnet mask 255.255.255.224