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What_Lies_Bene1's avatar
What_Lies_Bene1
Icon for Cirrostratus rankCirrostratus
Oct 29, 2012

VLAN Source Checking

Hi all,

 

VLAN source checking checks the return route to a source is through the same VLAN the packet arrived on.

 

What if it's not? What happens? Is the traffic dropped?

 

config
design

2 Replies

  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Oct 29, 2012
    this is from past case.

     

     

    VLAN source check verifies to see if BIG-IP can correctly route back a request through the same originating vlan. If BIG-IP determines that it has no way to route a request back through same VLAN, it will drop the packet. Currently, however, in case of TCP, there does exist an alternate route for the originating IP, BIG-IP will send out a RESET packet through the alternate route to indicate that destination is not reachable.