3Com 5500G-EI - Jumboframe Enable; Loopback

Ethernet Port Configuration Commands 57
You can use the interface_name at this command. This consists of the
interface_type and the interface_number combined as a single parameter. For
example Ethernet1/0/1.
Description
Use the command interface interface_type interface_number to enter the
interface of the specified port.
If you want to configure the parameters of an Ethernet port, you must first use
this command to enter the Ethernet port view.
Example
To enter the interface for port “GigabitEthernet1/0/1”, enter the following:
<SW5500>system-view
System View: return to User View with Ctrl+Z.
[SW5500]interface Gigabitethernet1/0/1
jumboframe enable Syntax
jumboframe enable
undo jumboframe enable
View
Ethernet Port View
Parameter
None.
Description
Use the jumboframe enable command to allow jumbo frames to pass through
the specified Ethernet port. Use the
undo jumboframe enable command to
prevent jumbo frames from passing through an Ethernet port.
If using the 3comoscfg.def default file, jumbo frame support is disabled on all
ports. When it is enabled, frames between 1522 bytes and 9216 bytes are
permitted.
Example
Allow jumbo frames to pass through Ethernet port 1/0/1.
<SW5500>system-view
System View: return to User View with Ctrl+Z.
[SW5500]interface Gigabitethernet 1/0/1
[SW5500-GigabitEthernet1/0/1]jumboframe enable
loopback Syntax
loopback { external | internal }