H3C MSR 810 Command Reference Manual page 40

Parameters
: Specifies the VSI name, a case-sensitive string of 1 to 31 characters.
vsi-name
access-mode
subinterface, you can specify this keyword. The default access mode is VLAN. If the AC is a Layer 3
interface, you cannot specify this keyword.
: Specifies the Ethernet access mode.
ethernet
: Specifies the VLAN access mode.
vlan
track track-entry-number&<1-3>
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
For traffic that matches a 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.
•
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.
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.
Examples
# Map GigabitEthernet 1/0/1 to VSI vpn1.
<Sysname> system-view
[Sysname] vsi vpn1
[Sysname-vsi-vpn1] quit
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] xconnect vsi vpn1
Related commands
display l2vpn interface
display l2vpn service-instance
: Specifies an access mode. If the AC is an Ethernet service instance or Layer 3
: Specifies a space-separated list of up to three track
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