H3C S7500 Series Ethernet Switches Command Manual

Command Manual – Multicast
H3C S7500 Series Ethernet Switches
Chapter 3 Common IP Multicast Configuration
Commands
3-12
When the switch receives a multicast packet, the switch will search the multicast
forwarding entry according to the source address and destination address of the packet.
If the matched forwarding entry is found and the packet is received on the right ingress
of the forwarding entry, the packet will be forwarded according to the forwarding entry. If
the packet is not received on the right ingress of the forwarding entry, the packet is
regarded as a wrongif packet. The wrongif packet will be reported to the CPU.
In some networks, plenty of wrongif packets will be reported to the CPU of the switch,
thus aggravating the workload of the switch. In this case, you can configure the
holdtime of wrongif packets, so that the wrongif packets will be dropped instead of
being forwarded to the CPU of the switch, and the CPU will be prevented from being
stricken by too many packets.
In the configured holdtime, wrongif packets are not reported to the CPU, so that the
CPU can be prevented from being stricken by too many multicast packets.
Examples
# Set the holdtime of wrongif packets to 60 seconds.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] multicast wrongif-holdtime 60
3.1.11 multicast-source-deny
Syntax
multicast-source-deny enable [ interface interface-list ]
undo multicast-source-deny enable [ interface interface-list ]
View
System view, Ethernet port view
Parameters
interface-list: Specifies Ethernet port list, expressed in the form of interface-list =
{ { interface-type interface-number | interface-name } [ to { interface-type
interface-number | interface-name } ] }&<1-10>. The interface-number argument refers
to one single Ethernet port, expressed in the form of interface-number = { interface-type
interface-number | interface-name }, where the interface-type argument refers to the
port type, the interface-number argument refers to the port number, and the
interface-name argument refers to the port name. For meanings and value ranges of
the interface-type argument, the interface-number argument and the interface-name
argument, refer to the parameters in the section “Port Basic Configuration” in this
manual.