On BIG-IP systems,physical interface bandwidth is fixedby the link speed (for example, 1GbE or 10GbE).
When traffic demand exceeds the capacity of a single interface, BIG-IP provideslink aggregationthrough trunks.
Key concepts involved:
* InterfacesA single physical interface (such as 1.1) is limited to its negotiated link speed. You cannot exceed this capacity through software tuning alone.
* Trunks (Link Aggregation)Atrunkcombines multiple physical interfaces into a single logical interface.
* BIG-IP supports LACP and static trunks.
* Traffic is distributed across member interfaces, increasingaggregate bandwidthand providing redundancy.
* VLANs are then assigned to thetrunk, not directly to individual interfaces.
Why optionBis correct:
* Creating atrunk with two interfacesallows BIG-IP to use both physical links simultaneously.
* This increases total available bandwidth (for example, two 10Gb interfaces # up to 20Gb aggregate capacity).
* This is thedocumented and supported methodfor scaling bandwidth on BIG-IP.
Why the other options are incorrect:
* A. Increase the MTUMTU changes affect packet size and efficiency,not total bandwidth capacity.
* C. Assign two interfaces to the VLANBIG-IP doesnotsupport assigning a VLAN to multiple interfaces directly. VLANs must be associated withone interface or one trunk.
* D. Set the media speed manuallyMedia speed can only be set up to the physical capability of the interface and connected switch port. It cannot exceed the hardware limit.
Conclusion:
To increase total available bandwidth on BIG-IP when a single interface is insufficient, the administrator must create atrunk object with multiple interfacesand move the VLAN onto the trunk. This aligns directly with BIG-IP data plane design and best practices.