3com S7906E Manuel De Montage

 

1-9 

interface interface-type 
interface-number 

Configure the interval for 
collecting port statistics 

flow-interval interval 

Optional 

By default, the interval for 
collecting port statistics is 300 
seconds. 

 

Due to tremendous amount of traffic occurring on an Ethernet port, it is likely that some frames greater 

than the standard Ethernet frame size are received. Such frames (called jumbo frames) will be dropped. 

With forwarding of jumbo frames enabled, the system does not drop all the jumbo frames. Instead, it 

continues to process jumbo frames with a size greater than the standard Ethernet frame size and yet 

within the specified parameter range. 

In port configuration mode (Ethernet port view/port-group view), you can set the length of jumbo frames 

that can pass through the Ethernet port. 

z 

If you execute the command in Ethernet port view, the configurations take effect only on the current 

port. 

z 

If you execute the command in port-group view, the configurations take effect on all ports in the port 

group. 

Follow these steps to enable the forwarding of jumbo frames: 

Enter system view 

— 

port-group manual 
port-group-name 

In port-group view 

jumboframe enable [ value ] 

interface interface-type 
interface-number 

Enable the 
forwarding 
of jumbo 
frames 

In Ethernet port 
view 

jumboframe enable [ value ] 

Use any command. 

By default, the device 
allows jumbo frames with 
the specified length to 
pass through all Ethernet 
ports. The default length of 
jumbo frames that are 
allowed to pass is 1536 
bytes. 

 

If you set the value argument for ports of a port group in Ethernet port view or port-group view for 

multiple times, the latest configuration takes effect. 

 

If a port receives a packet that it sent out, a loop occurs. Loops may cause broadcast storms. The 

purpose of loopback detection is to detect loops on a port. When loopback detection is enabled on an 

Ethernet port, the device periodically checks for loops on the port. If a loop is detected on the port, the 

device operates on the port according to the pre-configured loopback detection actions, and sends a 

trap message to the terminal.