Jumbo Frame Support

Jumbo frames are the data frames that are larger than 1500 bytes and includes the Layer 2 header and frame check sequence. Jumbo frames can support up to 9216 bytes and can be configured on the following:

• Mobility Controllers (7000 Series controllers, 7200 Series controllers, 9000 Series controllers, 9200 Series controllers, and Mobility Controller Virtual Appliances).
• Mobility Conductor (Mobility Conductor Virtual Appliance and hardware Mobility Conductor) .

In centralized deployments, frames that are more than 1500 bytes in size are generated from the AP to the managed device during encryption and enabling AMSDU. Therefore, whenever the AP associates to the managed device, jumbo frames are used to get the highest network performance. If this functionality is not supported, the data frames gets fragmented, which reduces the overall throughput of the network and makes the network slow.

You can enable the jumbo frame support in the following scenarios:

• Tunnel node—In a tunneled node deployment, the wired clients connected on the tunneled nodes can send and receive the jumbo frames.
• L2 or L3 GRE tunnels—When you establish a GRE Generic Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel between two managed devices, the clients on one managed device can send and receive jumbo frames from the clients on the other managed device on enabling jumbo frames.
• Between wired clients—In a network where clients connect to the managed device with jumbo frames enabled ports can send and receive the jumbo frames.
• Wi-Fi tunnel—A Wi-Fi Wi-Fi is a technology that allows electronic devices to connect to a WLAN network, mainly using the 2.4 GHz and 5 GHz radio bands. Wi-Fi can apply to products that use any 802.11 standard. tunnel can support an AMSDU jumbo frame for an AP (the maximum MTU Maximum Transmission Unit. MTU is the largest size packet or frame specified in octets (eight-bit bytes) that can be sent in networks such as the Internet. supported is up to 9216 bytes).
• IPsec site-to-site tunnels—The Jumbo frames are now supported in both IPv4 and IPv6 networks over an IPsec Internet Protocol security. IPsec is a protocol suite for secure IP communications that authenticates and encrypts each IP packet in a communication session. site-to-site tunnel between two managed devices. The IPsec Internet Protocol security. IPsec is a protocol suite for secure IP communications that authenticates and encrypts each IP packet in a communication session. site-to-site tunnel can be established between two standalone controllers or a managed device connected to a Mobility Conductor.

The following sections describe:

Limitations for Jumbo Frame Support

This release of AOS-8 does not support the jumbo frames for the following scenarios:

• IPIP and xSec.
• Fragmentation and Reassembly of IPv4 and IPv6.

Configuring Jumbo Frame Support

You can use the CLI Command-Line Interface. A console interface with a command line shell that allows users to execute text input as commands and convert these commands to appropriate functions. to configure the jumbo frame support:

• To enable the jumbo frame support globally and to configure the MTU Maximum Transmission Unit. MTU is the largest size packet or frame specified in octets (eight-bit bytes) that can be sent in networks such as the Internet. value:

  (host) [mynode] (config) #firewall Firewall is a network security system used for preventing unauthorized access to or from a private network. jumbo mtu Maximum Transmission Unit. MTU is the largest size packet or frame specified in octets (eight-bit bytes) that can be sent in networks such as the Internet. <1789-9216>

  You can configure the MTU Maximum Transmission Unit. MTU is the largest size packet or frame specified in octets (eight-bit bytes) that can be sent in networks such as the Internet. value between 1789-9216. The default MTU Maximum Transmission Unit. MTU is the largest size packet or frame specified in octets (eight-bit bytes) that can be sent in networks such as the Internet. value is 9216.

• To enable jumbo frame support on a port channel:

  (host) [mynode] (config) #interface port-channel <id> jumbo

• To enable jumbo frame support on a port:

  (host) [mynode] (config) #interface gigabitethernet <slot>/<module>/<port> jumbo

• To enable jumbo frame support in an IPsec Internet Protocol security. IPsec is a protocol suite for secure IP communications that authenticates and encrypts each IP packet in a communication session. site-to-site tunnel:

  (host) [mynode] (config) #crypto-local ipsec-map ipv6mtu-standalone

  (host) [mynode] (config-submode)#ipsec-mtu 9000

Viewing Status of Jumbo Frame Support

Execute the following command to view the global status of the jumbo frame support:

Execute the following command to view the jumbo frame status on a port:

Execute the following command to view the jumbo frame status on a port channel:

Execute the following commands to view the jumbo frame status in an IPsec Internet Protocol security. IPsec is a protocol suite for secure IP communications that authenticates and encrypts each IP packet in a communication session. site-to-site tunnel:

Jumbo Lite Frames Support

Starting from AOS-8.10.0.0, the Jumbo Lite frames are supported in both IPv4 and IPv6 network. The Jumbo Lite frames are supported over an IPsec Internet Protocol security. IPsec is a protocol suite for secure IP communications that authenticates and encrypts each IP packet in a communication session. site-to-site tunnel for the VMCs. This feature allows the VMC to forward data frames over an IPsec Internet Protocol security. IPsec is a protocol suite for secure IP communications that authenticates and encrypts each IP packet in a communication session. site-to-site tunnel that are larger than 1500 bytes without fragmentation, which enhances the overall network performance.

In IPv6 site-to-site tunnels, the minimum MTU Maximum Transmission Unit. MTU is the largest size packet or frame specified in octets (eight-bit bytes) that can be sent in networks such as the Internet. size is 1280 bytes. When a user configures the MTU Maximum Transmission Unit. MTU is the largest size packet or frame specified in octets (eight-bit bytes) that can be sent in networks such as the Internet. size with a value less than 1280 bytes, the IPv6 tunnels will use an MTU Maximum Transmission Unit. MTU is the largest size packet or frame specified in octets (eight-bit bytes) that can be sent in networks such as the Internet. size of 1280 bytes. For non-VMC platforms, the maximum MTU Maximum Transmission Unit. MTU is the largest size packet or frame specified in octets (eight-bit bytes) that can be sent in networks such as the Internet. size is limited to 2500 bytes.

You can execute the following command using the CLI Command-Line Interface. A console interface with a command line shell that allows users to execute text input as commands and convert these commands to appropriate functions. to configure jumbo lite frame support:

You can execute the following command using the CLI Command-Line Interface. A console interface with a command line shell that allows users to execute text input as commands and convert these commands to appropriate functions. to view the status of the jumbo lite frame support: