VLAN and self IP sync between HA

Question

I have a HA pair of LTMs that gets virtual servers dynamically configured at any time via API.
&nbsp;When this happens, the VLANs and self IPs are not synced to the standby LTM (why it doesn't sync the VLANs is beyond me)&nbsp;
&nbsp;So I need a way to script it....  In what files are the vlans and self IP configuration stored in?  I should be able to create script pretty easily, but can't find the correct files.&nbsp;
&nbsp;Any other suggestions?&nbsp;
&nbsp;Cheers&nbsp;

hamish · Answer

Vlans aren't part of the shared config, so they wont sync. You need to create them on both ha members. Same with self ips. Floating ones will sync though. 
&nbsp;  
&nbsp; The virtual servers and pools etc will sync when you tell the units to sync. Theres an icontrol method for this too. 
&nbsp;  
&nbsp; H

techgeeeg · Answer

Hi Luca, 
&nbsp; The elements on the LTM box which has to do with the traffic are Nodes, Pools, Virtual Servers, iRules, certificates monitors etc so these items are synced VLANS, self IP's are individual identity so its not syncd. Also Hamish has given a very good explanation. 
&nbsp;  
&nbsp; Regards,

luca_55898 · Answer

Yea i understand this, but if the VLANs don't sync and you forget to configure them, and a failover occurs, traffic will fail.  &nbsp;
&nbsp;Just seems weird to me...If they need to exist on both devices for traffic to work then they should auto sync.&nbsp;&nbsp;

hamish · Answer

One reason that sync may not be a good idea, is that the vlan info may be different on the two devices... The VLAN id for example doesn't need to be the same... It may be a bridged architecture where the vlanid is 10 on one device and 20 on the second and there's a bridge between them. 
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&nbsp; You couldn't sync that... Plus interfaces used may be different (1.1 on one device, 2.1 on the other). etc etc. 
&nbsp;  
&nbsp; H

laudec_55181 · Answer

Hamish is correct. The network configuration is unique to each device. Think of an active-active configuration. Everything that is stored in the bigip_base.conf file is not sync between the devices. VLANs, Self-IP. Management IP, Trunks, etc.

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VLAN and self IP sync between HA

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