Managed Configure VLAN, Unable to Issue DHCP out

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ASKER

Actually I installed the 3com Network Device Manager login into the 3COM switch and configured the VLAN to both tagged or untagged, without any luck. If it doesn't ping to the fortigate gateway the issue should lie on the 3com switch. I enclosed the screenshot of my config in here for a look.

One thing need to note is if I access directly to the switch using IE, I will not be able to see the VLAN configuration as I see in 3com Network Device Manager. I no idea if it is because of the firmware of the switch might be obsolete that causes this issue.

VLAN-Config.JPG

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ASKER

Problem it doesn't work as it should. Unless, you wan me connect 1 pc at 1 port with pre-assigned IP and another with the same and try ping to each other to isolate maybe the problem might be at the fortigate portion.

ASKER

I telnet into the switch I checked the vlan settings still there. as I configured using the GUI.

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Yeah I just did as you ask when I post the previous message. Let me enclosed screenshot to explain it better.

TELNET-VLAN-Config.JPG

SOLUTION

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SOLUTION

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ASKER

How to check if both ports are configured auto negotiation. I thought by default all switch port is configured for auto negotiation

in the ports menu via telnet, however, if both ports are active (green led), then port is up with correct settings.

ASKER

If that the case both ports are up with green led, but I cannot ping to the the fortigate. I manually configure the 2 static ip on 2 laptop within the same subnet and ip range (with firewall and antivirus disabled) and tried ping to each other. Both reply with timeout. I running out of ideas what going wrong with the vlan.

please issue arp -an on both laptops - I want to check whether pc's can get macs of the second side

ASKER

When I run the command arp -a on both laptop. The laptop configure with the IP 192.168.1.4 respond

Interface 192.168.1.4 ---- 0x3
Internet Address Physical Address Type
192.168.1.5 00-00-00-00-00-00 invalid

The laptop configure with IP 192.168.1.5 respond

There are no arp entries.

so it means, you don't have both ports in the same vlan.....
is it possible you are using incorrect ports/unit?

ASKER

No I specifically configure it under unit 1 port 4 & 8. If they are not in the same VLAN 2 then if I use a laptop plug to the port I should able to grab the IP from the original VLAN 1. I had tried both ports are unable to grab IP from my DHCP server.

yes, but from the other hand if those ports are within the same vlan, pcs should be able to see each other.
can you reboot your stack?

ASKER

I will have to wait after office working hour to do that. If reboot is the only choice.

if you say that you have created vlan, and assigned ports to it and it still not working - I would try rebooting device....

ASKER

Ok I rebooted the switch. The problem still persist. arp -a still unable to see each other neither can ping or grabing IP from the dhcp server.

hmmmmm
please, check mac addresses learned by switch on both ports.
do both macs are within the same vlan?