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Keith Armstead
1 Copper

Connect 3 PowerConnect Switches with multiple VLAN's

I am having a problem with connectivity.  I have 3 Dell PowerConnect switches, each with multiple VLAN's.

     Switch A is a 2748, the IP address is set to 172.16.30.254.  VLAN ID 1 has ports 1 - 2, 27-42 and 48.  I have a VLAN ID 5 set with Tag Egress Packets for ports 27 - 42 and Untag Egress Packets for port 45.  VLAN ID 3025 has Untag ports of 3 - 26 and Tag ports of 27 - 42 and 48.  VLAN ID 3028 has Untag ports 43 - 44 and Tag port 48.  VLAN ID 3029 has Untag ports 46 - 47 and Tag port 48.  Port 48 is connected to an Out of Band connection to our main office with VLAN's 3025, 3028 and 3029 running through it.  VLAN ID 3025 is our LAN, with IP scheme 10.0.1.X.  VLAN ID 3028 is a WLAN, with IP scheme 192.168.254.X, but is not used at this time.  VLAN ID 3029 is the WAN.  VLAN ID 5 is our DMZ, with IP scheme 172.31.1.X.

     Switch B is a 2848, the IP address is set to 172.16.30.245.  VLAN ID 1 has ports 1 - 2, 25-46.  VLAN ID 5 is set with Untag ports 47 - 48 and Tag ports 25 - 46.  VLAN ID 3025 has Untag ports 3 - 24 and Tag ports 25 - 46.  The IP schemes are the same as listed above.

     Switch C is a 2824, the IP address is set to 172.16.30.250.  VLAN ID 1 has ports 1 - 4.  VLAN ID 6 is set with Untag ports 5 - 14.  VLAN ID 7 is set with Untag ports 15 - 24.  VLAN ID 6 is one side of the iSCSI, with IP Scheme 192.168.130.X.  VLAN ID 7 is the other side of the iSCSI, with IP Scheme 192.168.131.X.  This switch is set as the DHCP for the 172.16.30.X.  I have a uplink between this switch and each of the other 2.

I have 5 VMware hosts that are connected to these switches, with split network cards between switches A & B, in the Tag ports for VLAN ID's 5 and 3025. 

Right now, I cannot connect any VM server that is in the DMZ to the internet that is on any host but 1.  If i move them to another host, they cannot see the internet, but they can still see the VM servers that are in the DMZ, but all of the VM servers in the LAN can connect out to the internet. 

My issue right now is making sure that not only do i have this set up correctly.  Where should the Uplinks be between the 3 switches?  Specifically switches A & B.

I am sorry to be so long winded on this, but I wanted to make sure that you had the information.  Please help.

Thanks,

Keith

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2 Replies
Anaraendil
2 Bronze

Re: Connect 3 PowerConnect Switches with multiple VLAN's

Hi,

Your description is a little bit confusing:) If VM on host 1 can connect to internet, what's the difference between all these hosts? Which ports on both switches belong to host 1 and which to others? Do you have inter-switch link?

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Keith Armstead
1 Copper

Re: Connect 3 PowerConnect Switches with multiple VLAN's

Thank you for responding,  Sorry that it is a bit confusing.  I was trying to put all the information down. 

3 of the 5 hosts have 4 NIC's that are plugged 2 in switch A and 2 in switch B, the other 2 only have 3 NIC's, so I plugged 2 and 1, these are plugged into the Tag ports for VLAN ID 5 & 3025 only.

The inter-switch link I think is the problem.  I have an uplink from the VLAN ID 3025 Untag and I have one in the Tag VLAN ID 5 & 3025 ports.

Thanks,

 

Keith

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