Group - H3C CR16000-F Command Reference Manual

To confine flood traffic to the site-facing interfaces, use this command to disable flooding on the VSI
bound to the VXLAN. The VSI will not flood the corresponding frames to VXLAN tunnel interfaces.
Examples
# Disable flooding for VSI vsi1.
<Sysname> system-view
[Sysname] vsi vsi1
[Sysname-vsi-vsi1] flooding disable all

group

Use group to assign a VXLAN a multicast group address for flood traffic, and specify a source IP
address for multicast VXLAN packets.
Use undo group to restore the default.
Syntax
group group-address source source-address
undo group group-address source source-address
Default
A VXLAN uses unicast mode (head-end replication) for flood traffic. No multicast group address or
source IP address is specified for multicast VXLAN packets.
Views
VXLAN view
Predefined user roles
network-admin
Parameters
group-address : Specifies a multicast address in the range of 224.0.1.0 to 239.255.255.255.
source source-address : Specifies a source IP address for multicast VXLAN packets.
Usage guidelines
To reduce traffic sent to the transport network, use multicast mode if the network has dense flood
traffic or many VTEPs.
The multicast mode supports the following multicast methods:
•
PIM—VTEPs and transport network devices run PIM to generate multicast forwarding entries.
On a VTEP, you can use the IP address of a loopback interface as the source IP address for
multicast VXLAN packets. If the VTEP has multiple transport-facing interfaces, PIM dynamically
selects the outgoing interfaces for multicast VXLAN packets.
•
IGMP host—VTEPs and transport network devices run PIM and IGMP to generate multicast
forwarding entries.
Transport-facing interfaces of VTEPs act as IGMP hosts.
Transport network devices connected to a VTEP run IGMP.
All transport network devices run PIM.
On a VTEP, you must use the IP address of the transport-facing interface as the source IP
address for multicast VXLAN packets. If the VTEP has multiple transport-facing interfaces,
multicast VXLAN packets are sent to the transport network through the interface that provides
the source IP address for multicast VXLAN packets.
VTEPs in a multicast-mode VXLAN can use different multicast methods.
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