17
The aging timer is fixed at 25 minutes for ARP flood suppression entries. If the suppression table is
full, the VTEP stops learning new entries. For the VTEP to learn new entries, you must wait for old
entries to age out, or use the
reset arp suppression
command to clear the table.
If the
flooding disable
command is executed on a VSI that is enabled with ARP flood suppression,
follow these restrictions and guidelines:
•
As a best practice, set the MAC aging timer to a higher value than the aging timer for ARP flood
suppression entries on all VTEPs. This setting prevents the traffic blackhole that occurs when a
MAC address entry ages out before its ARP flood suppression entry ages out.
•
You must use the
mac-address static
command to manually add remote MAC address entries
on each VTEP.
To set the MAC aging timer, use the
mac-address timer
command.
When you configure ARP flood suppression on a multicast-mode VXLAN, follow these restrictions
and guidelines:
•
Make sure ARP flood suppression is enabled or disabled across the VTEPs in the VXLAN.
•
Do not enable ARP flood suppression if the VXLAN contains third-party VTEPs.
To enable ARP flood suppression:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter VSI view.
vsi
vsi-name
N/A
3.
Enable ARP flood
suppression.
arp suppression enable
By default, ARP flood
suppression is disabled.
Displaying and maintaining VXLANs
Execute
display
commands in any view and
reset
commands in user view.
Task Command
Display ARP flood suppression entries
on VSIs.
display arp suppression vsi
[
name vsi-name
]
[
slot
slot-number
]
[
count
]
Display MAC address entries for VSIs.
display l2vpn mac-address
[
vsi
vsi-name
] [
dynamic
] [
count
]
Display information about Ethernet
service instances.
display l2vpn service-instance
[
interface interface-type
interface-number
[
service-instance instance-id
] ] [
verbose
]
Display information about VSIs.
display
l2vpn
vsi
[
name vsi-name
] [
verbose
]
Display information about the multicast
groups that contain IGMP
host-enabled interfaces.
display
igmp
host
group
[
group-address
|
interface
interface-type
interface-number
] [
verbose
]
Display information about tunnel
interfaces.
display interface
[
tunnel
[
number
] ] [
brief
[
description
|
down
] ]
Display VXLAN tunnel information for
VXLANs.
display
vxlan tunnel
[
vxlan vxlan-id
]
Clear ARP flood suppression entries
on VSIs.
reset arp suppression vsi
[
name vsi-name
]
Clear dynamic MAC address entries
on VSIs.
reset l2vpn mac-address
[
vsi vsi-name
]
Clear packet statistics on VSIs.
reset l2vpn statistics vsi
[
name vsi-name
]
