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36366
November 10th, 2003 22:00
port overlapping
I´m working with a 3324, a have 4 vlan already configure an running , but a need that two different vlan´s could access one particular port. who do I configure this
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GregG1
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November 11th, 2003 13:00
First of all, there is no way for an untagged port to accept traffic from two VLANs. Port overlapping allows you to untag a port on multiple VLANs, however, this only provides for egress (outbound) traffic. Ingress traffic (inbound) is controlled by the PVID or native VLAN on the port. An untagged port can only have one PVID so a port will only accept ingress traffic from a single VLAN.
The situation in which you would use port overlapping would be the following:
You have multiple clients on 4 separate VLANs (VLANs 2-5) and a server that all clients need to access. You would need to create another VLAN for the server (VLAN 6), untag the server port on all VLANs (2-6), and set the PVID to 6. All client ports would need to be untagged on their VLAN and VLAN 6 with a PVID of their native VLAN (2-5). This configuration would allow the clients to send egress traffic to the server (VLAN 6) and would allow the server to send egress traffic to all of the clients (VLANs 2-5) and accept traffic for VLAN 6.
This being said... the port overlapping feature on the 3300 series switches is currently not fuctional. When a port is untagged on multiple VLANs, rebooting the switch causes the PVID to revert to the lowest number VLAN configured on the port. This will be fixed in the next revision of the firmware.
Update: The PVID issue was fixed in firmware revision 1.1.0.42
Message Edited by DELL-GregG on 07-16-2004 01:45 PM