Jumbo Frames On The Aspen 8810 Switch Only; Enabling Jumbo Frames; Path Mtu Discovery - Extreme Networks ExtremeWare XOS Guide Manual

Configuring Slots and Ports on a Switch

Jumbo Frames on the Aspen 8810 Switch Only

The following information applies to jumbo frames on the Aspen 8810 switch only:
The Aspen 8810 switch supports jumbo frames on the entire switch; you cannot enable or disable
●
jumbo frames per port.
The Aspen 8810 switch enables or disables jumbo frames on the entire switch; jumbo frames are
either enabled or disabled on every port on the switch. The system returns an error message if you
attempt to enter specified ports.
To enable jumbo frame support on the Aspen 8810 switch, use the following command:
●
enable jumbo-frame ports all
Once you issue this command, any new modules you add to the switch will also have jumbo frames
enabled.
When you configure VMANs on the Aspen 8810 switch, you must enable jumbo frames for the
●
entire switches prior to configuring the VMANs.

Enabling Jumbo Frames

NOTE
Some network interface cards (NICs) have a configured maximum MTU size that does not include the additional 4
bytes of CRC. Ensure that the NIC maximum MTU size is at or below the maximum MTU size configured on the
switch. Frames that are larger than the MTU size configured on the switch are dropped at the ingress port.
To enable jumbo frame support, enable jumbo frames on the desired ports. To set the maximum jumbo
frame size, use the following command:
configure jumbo-frame-size <framesize>
The jumbo frame size range is 1523 to 9216. This value describes the maximum size of the frame in
transit (on the wire), and includes 4 bytes of CRC plus another 4 bytes if 802.1Q tagging is being used.
Set the MTU size for the VLAN, using the following command:
configure ip-mtu <mtu> vlan <vlan_name>
Next, enable support on the physical ports that will carry jumbo frames using the following command:
enable jumbo-frame ports [all | <port_list>]
NOTE
The Aspen 8810 switch enables or disables jumbo frames on the entire switch; the system returns an error message
if you attempt to enable jumbo frames on specified ports.

Path MTU Discovery

NOTE
The Aspen 8810 switch does not support the router specification for path MTU discovery.
ExtremeWare XOS 11.1 Concepts Guide
84