HPE FlexNetwork VSR1000, Layer 2-Lan Switching Configuration Manual

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2
As shown in Figure 1 , Host A and Host B are in dif ferent VLANs. The two hosts can communicate
with each other after you perform the following tasks:
1.
Specify 1.1.1.1/24 and 1.1.2.1/24 as the gateway IP addresses for Host A and Host B,
respectively.
2.
On the device, configure VLAN termination on Layer 3 Ethernet subinterfaces GigabitEthernet
1/0/1.1 and GigabitEthernet 1/0/2.1.
Figure 1 VLAN termination for inter-VLAN communication
LAN-WAN communication
Typically, WAN protocols such as ATM, Frame Relay, and PPP do not re cognize VLAN-tagged
packets from LANs. Before packets are sent to a WAN, the sending port must locally record the
VLAN information and remove VLAN tags from the packets. To do that, configure VLAN termination
on subinterfaces.
As shown in
Figure 2 , a host is located on a customer network and wants to access the WAN network
through a PPPoE connection. CVLAN and SVLAN represent the VLAN on the customer network and
service provider network, respectively.
To access the WAN network, a packet originating from the host is processed as follows:
1.
Layer 2 Switch A adds a CVLAN tag to the packet and sends the packet.
2.
Layer 2 Switch B adds an SVLAN tag to the packet on the QinQ-enabled port.
3.
The packet is forwarded on the service provider network based on the SVLAN tag.
4.
The PPPoE gateway removes the two layers of VLAN tags from the packet and adds new
VLAN tags on the QinQ termination-enabled port.
5.
The PPPoE gateway sends the packet to the WAN network through
synchronous/asynchronous serial interface Serial 2/1/0.
Figure 2 VLAN termination enables LAN-WAN communication