Forum Discussion

epaalx's avatar
epaalx
Icon for Cirrus rankCirrus
Sep 13, 2017

What determines unique valid VS?

Would it be correct to say that a unique VS is defined by the tuple {destination,source,vlans,ip-protocol} (of TMSH's "/ltm virtual" attributes)? That is, as long as one of these elements of the tuple is different, a VS is considered different to another VS and is allowed.

 

So, I can defined two VSs - one having {destination='X',source='10.0.0.0/24',vlans='Y',ip-protocol='Z'} and other {destination='X',source='11.0.0.0/24',vlans='Y',ip-protocol='Z'} (assuming 'X'..'Z' are valid values) then BIG-IP should accept these as different VSs - correct?

 

(If above is correct) two questions:

 

  1. what if I specify "source" address of a VS that overlaps the "source" of existing VS - does BIG-IP validate for this at configuration?
  2. why does the error "01070333:3: virtual server illegally shares destination address, source address, and service port with virtual server " not mention "vlans" attribute?
application delivery
LTM
  • amintej's avatar
    amintej
    Icon for Cirrus rankCirrus
    Sep 13, 2017

    Hello,

    What BIG IP version do you have ? I got the error with vlan attribute: 

     01070333:3: Virtual Server /Common/VS-3 illegally shares destination address, source address, service port, ip-protocol, and vlan with Virtual Server /Common/VS-2.

    I tested with 12.1.2 HF 0.93.249.

    Source address is address or network from which Big-IP accepts traffic for this VS, so I think you can overlap many times but the rest of combination for the VS: VLAN:Destination:Port must be different.