Configuring The Destination Udp Port Number Of Vxlan Packets; Configuring Vxlan Packet Check; Enabling Arp Flood Suppression - H3C S7500E-XS Series Configuration Manual

Step
4. (Optional.) Enable
selective flood for a MAC
address.
Configuring the destination UDP port number of
VXLAN packets
Step
1. Enter system view.
2. Configure a destination
UDP port for VXLAN
packets.

Configuring VXLAN packet check

The device checks the inner Ethernet header of each VXLAN packet for 802.1Q VLAN tags. If the
header contains 802.1Q VLAN tags, the device drops the packet.
If a remote VTEP uses the Ethernet access mode, its VXLAN packets might contain 802.1Q VLAN
tags. To prevent the local VTEP from dropping the VXLAN packets, do not execute the vxlan
invalid-vlan-tag discard command on the local VTEP.
The access mode is configurable by using the xconnect vsi command.
To configure VXLAN packet check:
Step
1. Enter system view.
2. Enable the VTEP to drop VXLAN
packets that have 802.1Q VLAN
tags in the inner Ethernet
header.

Enabling ARP flood suppression

Use ARP flood suppression to reduce ARP request broadcasts.
Command
selective-flooding mac-address
mac-address
Command
system-view
vxlan udp-port port-number
Command
system-view
vxlan invalid-vlan-tag discard
16
Remarks
By default, selective flood is
disabled.
Use this feature to exclude a
remote MAC address from the
flood suppression done by using
the flooding disable command.
The VTEP will flood the frames
destined for the specified MAC
address to remote sites when
unknown-unicast floods are
confined to the local site.
Remarks
N/A
By default, the destination UDP
port number is 4789 for VXLAN
packets.
You must configure the same
destination UDP port number on all
VTEPs in a VXLAN.
Remarks
N/A
By default, the VTEP does not
check the inner Ethernet
header for 802.1Q VLAN tags.