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Cisco ASA 5500 Series Configuration Guide using ASDM
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Chapter 8 Configuring Interfaces
Enabling Jumbo Frame Support (ASA 5580, Multiple Mode)
Detailed Steps
To disable these settings, use the no form of the command.
• To enable interfaces on the same security level to communicate with each other, from the
Configuration > Interfaces pane, check Enable traffic between two or more interfaces which are
configured with same security level.
• To enable communication between hosts connected to the same interface, check Enable traffic
between two or more hosts connected to the same interface.
Enabling Jumbo Frame Support (ASA 5580, Multiple Mode)
A jumbo frame is an Ethernet packet larger than the standard maximum of 1518 bytes (including Layer
2 header and FCS), up to 9216 bytes. You can enable support for jumbo frames for all interfaces by
increasing the amount of memory to process Ethernet frames. Assigning more memory for jumbo frames
might limit the maximum use of other features, such as access lists.
Note Other platform models do not support jumbo frames.
Prerequisites
In multiple context mode, set this option in the system execution space. In single mode, setting the MTU
larger than 1500 bytes automatically enables jumbo frames.
Detailed Steps
To enable jumbo frame support, choose the Configuration > Context Management > Interfaces pane,
and click the Enable jumbo frame support check box.
Note Changes in this setting require you to reboot the adaptive security appliance.
Be sure to set the MTU for each interface that needs to transmit jumbo frames to a higher value than the
default 1500; for example, set the value to 9000. See the “Configuring Advanced Interface Parameters”
section on page 8-26. Set the MTU within each context.
Monitoring Interfaces
This section includes the following topics:
• ARP Table, page 8-33
• DHCP, page 8-33
• MAC Address Table, page 8-35
• Dynamic ACLs, page 8-36
• Interface Graphs, page 8-36
• PPPoE Client, page 8-39
• Interface Connection, page 8-39
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