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NS0-157 · Question #74

A customer wants to use jumbo frames on an interface group called a0a. Interface group a0a contains ports e0c and e0d. Additionally, the customer is using VLAN tagging for VLANs 510 and 520. VLAN…

The correct answer is A. The MTU size must be set on the broadcast domain to which the ports belong. In NetApp ONTAP, MTU settings including jumbo frames are managed at the broadcast domain level, not directly on individual ports or VLAN interfaces.

Network Configuration and Data Access

Question

A customer wants to use jumbo frames on an interface group called a0a. Interface group a0a contains ports e0c and e0d. Additionally, the customer is using VLAN tagging for VLANs 510 and 520. VLAN 510 will use jumbo frames but VLAN 520 will not. When the customer tries to enable jumbo frames on a0a- 510 the command fails. What caused the failure?

Options

  • AThe MTU size must be set on the broadcast domain to which the ports belong.
  • BThe LIF corresponding with VLAN 510 is not configured for jumbo frames.
  • CPorts e0c and e0d have conflicting MTU sizes configured.
  • DJumbo frames must be enabled from the advanced privilege set.

How the community answered

(36 responses)
  • A
    64% (23)
  • B
    19% (7)
  • C
    11% (4)
  • D
    6% (2)

Why each option

In NetApp ONTAP, MTU settings including jumbo frames are managed at the broadcast domain level, not directly on individual ports or VLAN interfaces.

AThe MTU size must be set on the broadcast domain to which the ports belong.Correct

In ONTAP, the MTU is owned by the broadcast domain, and all member ports and their associated VLAN interfaces inherit it. Attempting to set the MTU directly on a VLAN interface like a0a-510 fails because the change must be applied to the broadcast domain first, which then propagates the MTU to all member ports and derived VLAN interfaces.

BThe LIF corresponding with VLAN 510 is not configured for jumbo frames.

LIF configuration does not control MTU; MTU is a property of the broadcast domain and its member ports, not of the logical interface.

CPorts e0c and e0d have conflicting MTU sizes configured.

A conflict between port MTU sizes on e0c and e0d is not the cause; the root issue is that MTU must be set at the broadcast domain level rather than directly on a VLAN interface.

DJumbo frames must be enabled from the advanced privilege set.

Configuring jumbo frames in ONTAP does not require the advanced privilege level; it is a standard networking task available at the admin privilege level.

Concept tested: ONTAP broadcast domain MTU configuration for jumbo frames

Source: https://docs.netapp.com/us-en/ontap/networking/configure_broadcast_domains_97_overview.html

Topics

#jumbo frames#MTU#broadcast domain#VLAN tagging

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