H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – Port Basic Configuration
H3C S7500 Series Ethernet Switches Chapter 1
Port Basic Configuration
1-3
the system drops the packets exceeding the traffic limit to reduce the traffic ratio of this
type to the reasonable range, so as to keep normal network service.
Follow these steps to configure broadcast/multicast suppression:
To do… Use the command… Remarks
Enter system view
system-view
—
Enter Ethernet port
view
interface interface-type
interface-number
—
Limit broadcast traffic
received on the current
port
broadcast-suppression
{ ratio | bandwidth
bandwidth | pps pps }
Optional
By default, the switch
does not suppress
broadcast traffic.
Limit multicast traffic
received on the current
port
multicast-suppression
{ ratio | bandwidth
{ mbps-value | kbps
kbps-value } | pps max-pps }
Optional
By default, the switch
does not suppress
multicast traffic.
 Note:
z Broadcast suppression is set in different ways for different LPUs of the S7500 series
switches: For type-A LPUs, broadcast suppression must be set in VLAN view; for
non-type-A LPUs, broadcast suppression must be set in Ethernet port view.
z Type-A LPUs include LS81FT48A, LS81FM24A, LS81FS24A, LS81GB8UA, and
LS81GT8UA.
1.1.3 Enabling Flow Control on a Port
When flow control is enabled on both the local and peer switches, if congestion occurs
on the local switch:
z The local switch sends a message to notice the peer switch to stop sending
packets to the local switch or reduce the packet sending speed temporarily.
z The peer switch will stop sending packets to the local switch or reduce the sending
speed when it receives the message. In this way, packet loss is avoided and the
network service operates normally.
Follow these steps to enable flow control on a port:
To do… Use the command… Remarks
Enter system view
system-view
—
Enable flow control
globally
flow-control enable
Required
By default, flow control is
disabled globally.