Forum Discussion
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You don't need to have a VLAN specifically for VIPs. Just route the IP subnet you want to use for VIPs to a self IP on any appropriate VLAN. So, for instance, create the external VLAN using a /29 or /30 IP subnet as appropriate. Then route say, 10.10.10.0/24 (your VIP range) from the core switch or firewall (or whatever) over that external VLAN, to the relevant self IP on the F5. If you did create 5 VLANs, yes, each one will need a self IP.
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In the F5 world, a trunk is a logical bundling of multiple physical interfaces, independent of L2 VLANs. Whatever you can do with an interface, you can do with a trunk. You can tag multiple VLANs over any kind of interface.
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APs have no direct relation to physical interfaces, but Route Domains do relate to VLANs and they exist within APs. A VLAN (rather than physical interface) can only be present in one RD. Multiple RDs can exist in a single AP. A trunk can carry tagged VLAN traffic for multiple RDs even if they are in different APs.
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See here: https://devcentral.f5.com/articles/v10-a-look-at-route-domains