H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – Multicast
H3C S7500 Series Ethernet Switches Chapter 4
Common Multicast Configuration
4-3
To do... Use the command... Remarks
Enter system view system-view —
Enter Ethernet port view
interface interface-type
interface-number
—
Configure suppression on
the multicast source port
in Ethernet port view
multicast-source-deny
enable
Optional
Suppression on the
multicast source port is
disabled on all ports of the
switch by default.
4.2.3 Configuring Suppression on Multicast Wrongif Packets
I. Introduction
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 matching forwarding entry is found and the packet is received on the right
incoming interface of the forwarding entry, the packet will be forwarded according to the
forwarding entry. If the packet is not received on the right incoming interface of the
forwarding entry, the packet is regarded as a wrongif packet. The wrongif packet will be
reported to the CPU.
In some network, many wrongif packets will be reported to the CPU of the switch, thus
aggravating the workload of the switch. In this case, you can configure suppression on
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.
II. Suppression on the holdtime of multicast wrongif packets
Follow these steps to configure suppression on the holdtime of multicast wrongif
packets:
To do... Use the command... Remarks
Enter system view system-view —
Configure suppression on
the holdtime of multicast
wrongif packets
multicast
wrongif-holdtime
seconds
Required
By default, the holdtime of
multicast wrongif packets
is 15 seconds.