VLANS &  IP Forwarding

Posted on 2011-10-31
Last Modified: 2012-08-13
Hi All,

Newbie question regarding VLANS:

There are many VLANS set up in my location, when interrogating the switch (Extreme Summit x250e) most of them have "IP Forwarding Enabled"

1) Does this mean that traffic can pass from one VLAN to another
2) If I turn this off, will it stop VLAN 1 "talking" to VLAN 2?


Question by:techmiss
    LVL 18

    Expert Comment

    yes and no.
    If you have IP forwarding enabled then the traffic will route directly on the switch if not then it would go up to the core to find its way to that VLAN.
    LVL 18

    Expert Comment

    so if you turn it off then it the routing isn't in place somewhere else then it will stop communicating

    Author Comment

    Thanks for your reply, when you say "core" what does that actually mean?

    LVL 18

    Accepted Solution

    a central network switch. I am assuming that there are some central switches that will take care of routing around your VLANS

    Author Closing Comment

    Yes, thanks for your help.

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