H3C CR16000-F Command Reference Manual page 41

vlan : Specifies the VLAN access mode.
track track-entry-number&<1-3> : Specifies a space-separated list of up to three track
entry numbers in the range of 1 to 1024. The AC is up only if a minimum of one associated track entry
is in positive state.
Usage guidelines
VLAN interfaces do not support this command.
To monitor the status of an AC, associate it with track entries.
To configure this command for an Ethernet service instance, you must first use the
encapsulation command to add a traffic match criterion to the service instance.
For traffic that matches the Ethernet service instance or Layer 3 interface, the system uses the VSI's
MAC address table to make a forwarding decision.
The access mode determines how a VTEP processes the 802.1Q VLAN tags in the inner Ethernet
frames assigned to the VSI.
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VLAN access mode—Ethernet frames received from or sent to the local site must contain
802.1Q VLAN tags.
For an Ethernet frame received from the local site, the VTEP removes all its 802.1Q VLAN
tags before forwarding the frame.
For an Ethernet frame destined for the local site, the VTEP adds 802.1Q VLAN tags to the
frame before forwarding the frame.
In VLAN access mode, VXLAN packets sent between VXLAN sites do not contain 802.1Q
VLAN tags. VXLAN can provide Layer 2 connectivity for different 802.1Q VLANs between sites.
You can use different 802.1Q VLANs to provide the same service in different sites.
•
Ethernet access mode—The VTEP does not process the 802.1Q VLAN tags of Ethernet
frames received from or sent to the local site.
For an Ethernet frame received from the local site, the VTEP forwards the frame with the
802.1Q VLAN tags intact.
For an Ethernet frame destined for the local site, the VTEP forwards the frame without
adding 802.1Q VLAN tags.
In Ethernet access mode, VXLAN packets sent between VXLAN sites contain 802.1Q VLAN
tags. VXLAN cannot provide Layer 2 connectivity for different 802.1Q VLANs between sites.
You must use the same 802.1Q VLAN to provide the same service between sites.
The device removes the inner 802.1Q VLAN tag of the packets received on a Layer 3 subinterface
operating in QinQ access mode. VXLAN packets sent between VXLAN sites do not contain the inner
802.1Q VLAN tag, and VXLAN can provide Layer 2 connectivity for different 802.1Q VLANs between
sites. For a Layer 3 subinterface to operate in QinQ access mode, you must configure unambiguous
QinQ termination on it.
After you modify the access mode on a Layer 3 subinterface AC, local VMs that access the VXLAN
network through the subinterface cannot communicate with remote VMs. To resolve this issue, you
must clear the ARP entries on the local VMs or configure them to periodically send gratuitous ARP
packets.
If you use multiple Layer 3 subinterfaces of the same main interface as ACs, you must configure the
same access mode for these subinterfaces.
Examples
# Map GigabitEthernet 3/1/1 to VSI vpn1.
<Sysname> system-view
[Sysname] vsi vpn1
[Sysname-vsi-vpn1] quit
[Sysname] interface gigabitethernet 3/1/1
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