Operation Manual – VLAN-VPN
H3C S3100 Series Ethernet Switches Chapter 3
VLAN Mapping Configuration
3-4
 Note:
z A port that is in a link aggregation port group cannot have the VLAN Mapping
feature enabled.
z When configuring a VLAN mapping rule, make sure that the mapping relationship
between private network VLANs and public network VLANs is one-to-one.
z To modify a VLAN mapping relationship, you need to delete the corresponding
VLAN mapping rule and then define a new one.
z The VLAN mapping function based on global VLAN mapping rules is mutually
exclusive with the VLAN mapping function based on port-level VLAN mapping rules.
z The VLAN mapping function and the protocol-based VLAN function are mutually
exclusive on the same port.
z To use the VLAN mapping function together with the ARP detection function, you
need to enable ARP detection in both the initial VLAN and the mapped VLAN. For
detailed description of the ARP detection function, refer to the ARP part of the
manual.
z You are not allowed to configure both the VLAN mapping function and the IP filtering
function on the device. For description of the IP filter function, refer to the DHCP part
of the manual.
3.3 VLAN Mapping Configuration Example
3.3.1 Replacing the Private Network VLAN Tag through VLAN Mapping
I. Network requirements
Two customer networks are connected to the public network through Switch A and
Switch B. Configure the VLAN mapping function to enable packets to be exchanged
between the two networks through the public network VLANs.
z Switch A provides network access for terminal devices in VLAN 100 and VLAN
200 through Ethernet 1/0/11 and Ethernet 1/0/12. On the other side of the public
network, Switch B provides network access for servers in VLAN 100 and VLAN
200 through Ethernet 1/0/15 and Ethernet 1/0/16.
z Ethernet 1/0/10 of Switch A connects the customer network to the public network,
and so does Ethernet 1/0/17 of Switch B.
z It is required that packets of VLAN 100 and the packets of VLAN 200 of the two
customer networks are transmitted in the public network carrying the tag of VLAN
500 and the tag of VLAN 600.
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