H3C Technologies H3C S10500 Series Switches - Manual (Page 21)

10
To do… Use the command… Remarks
Assign Ethernet interfaces to the
manual port group group-member
interface-list
Required
If you use the group-member interface-type
interface-start-number to interface-type
interface-end-number command to add multiple
ports in batch to the specified port group, make
sure that all these ports are of the same type
and on the same interface card, and the
interface-end-number argument must be greater
than the interface-start-number argument.
Configure jumbo frame support
jumboframe enable
[ value ]
Required
By default, the switch allows jumbo frames
within 9216 bytes to pass through Ethernet
interfaces.
If you set the value argument multiple times, the
latest configuration takes effect.
Setting speed options for auto negotiation on an Ethernet
interface
Speed auto negotiation enables an Ethernet interface to negotiate with its peer for the highest speed that
both ends support by default. You can narrow down the speed option list for negotiation.
Figure 3 Speed auto negotiation application scenario
GE1/
0/1
GE
1/0/2
GE1/0
/3
As shown in Figure 3 , all ports on Switch A are operating in speed auto negotiation mode, with the
highest speed of 1000 Mbps. If the transmission rate of each server in the server cluster is 1000 Mbps,
their total transmission rate will exceed the capability of port GigabitEthernet 1/0/4, the port providing
access to the Internet for the servers.
To avoid congestion on GigabitEthernet 1/0/4, set 100 Mbps as the only option available for speed
negotiation on port GigabitEthernet 1/0/1, GigabitEthernet 1/0/2, and GigabitEthernet 1/0/3. As a
result, the transmission rate on each port connected to a server is limited to 100 Mbps.
Follow these steps to set speed options for auto negotiation on an Ethernet interface: