000-221 · Question #45
What is required to support VLANs in an AIX partition?
The correct answer is A. IEEE 802.1Q compatible adapter. Supporting VLANs on an AIX partition requires a network adapter that implements IEEE 802.1Q, the standard that defines the VLAN tagging mechanism used to identify VLAN membership within Ethernet frames.
Question
What is required to support VLANs in an AIX partition?
Options
- AIEEE 802.1Q compatible adapter
- BPromiscuous mode disabled
- CIEEE 802.3ad compatible interface
- DQoS must be enabled
How the community answered
(36 responses)- A75% (27)
- B8% (3)
- C14% (5)
- D3% (1)
Why each option
Supporting VLANs on an AIX partition requires a network adapter that implements IEEE 802.1Q, the standard that defines the VLAN tagging mechanism used to identify VLAN membership within Ethernet frames.
IEEE 802.1Q inserts a 4-byte tag into Ethernet frames carrying a VLAN ID, allowing a single physical or virtual adapter to participate in multiple isolated broadcast domains. For AIX to create VLAN pseudo-devices (via 'mkvdev -vlan' or entstat-based configuration), the underlying adapter must recognize and process 802.1Q-tagged frames; without hardware support for this standard, VLAN creation will fail or frames will be dropped.
Promiscuous mode controls whether an adapter accepts frames destined for other MAC addresses and has no relationship to VLAN tagging capability.
IEEE 802.3ad defines link aggregation (LACP) for bonding multiple physical links together, which is a separate feature entirely from VLAN tagging.
QoS manages traffic prioritization and bandwidth allocation policies and is not a dependency for enabling VLAN support on an adapter.
Concept tested: AIX VLAN IEEE 802.1Q adapter requirement
Source: https://www.ibm.com/docs/en/aix/7.3?topic=networking-virtual-local-area-networks-vlans
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