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By default, all Layer 3 aggregate interfaces and subinterfaces on the device use the same
default MAC address.
Configuring jumbo frame support
About jumbo frames
An aggregate interface might receive frames larger than 1536 bytes during high-throughput data
exchanges, such as file transfers. These frames are called jumbo frames.
How an aggregate interface processes jumbo frames depends on whether jumbo frame support is
enabled on the interface.
• If configured to deny jumbo frames, the aggregate interface discards jumbo frames.
• If enabled with jumbo frame support, the aggregate interface performs the following operations:
{ Processes jumbo frames that are within the allowed length.
{ Discards jumbo frames that exceed the allowed length.
Procedure
1. Enter system view.
system-view
2. Enter aggregate interface view.
{ Enter Layer 2 aggregate interface view.
interface bridge-aggregation interface-number
{ Enter Layer 3 aggregate interface view.
interface route-aggregation interface-number
3. Allow jumbo frames.
jumboframe enable [ size ]
By default, an aggregate interface allows jumbo frames with a maximum length of 9416 bytes to
pass through.
If you execute this command multiple times, the most recent configuration takes effect.
Setting the MTU for a Layer 3 aggregate interface
About the MTU
The MTU of an interface affects IP packets fragmentation and reassembly on the interface.
Procedure
1. Enter system view.
system-view
2. Enter Layer 3 aggregate interface or subinterface view.
interface route-aggregation { interface-number |
interface-number.subnumber }
3. Set the MTU.
mtu size
The default setting is 1500 bytes.
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