H3C S7500 Series Ethernet Switches Command Manual

Table Of Contents
Command Manual – Port Basic Configuration
H3C S7500 Series Ethernet Switches Chapter 1
Port Basic Configuration Commands
1-16
By default, jumbo frames that are larger than 1,518 bytes and smaller than 1,536 bytes
are allowed to pass through the Ethernet port.
Examples
# Allow jumbo frames smaller than 1,536 bytes to pass through GigabitEthernet 2/0/1.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] interface GigabitEthernet2/0/1
[H3C-GigabitEthernet2/0/1] jumboframe enable
1.1.16 loopback-detection enable
Syntax
loopback-detection enable
undo loopback-detection enable
View
System view
Parameters
None
Description
Use the loopback-detection enable command to enable loopback detection on ports.
Use the undo loopback-detection enable command to disable loopback detection on
ports.
By default, the port loopback detection feature is disabled.
z If loopback is found on an access port, the system disables the port, sends a Trap
message to the terminal and removes the corresponding MAC address forwarding
entry.
z If loopback is found on a trunk or hybrid port, the system disables the port, sends a
Trap message to the terminal and removes the corresponding MAC address
forwarding entry.
Related commands: display loopback-detection.
Examples
# Enable the loopback detection feature.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] loopback-detection enable