NOTE
In IPv4 VPN networking, you can configure a maximum of six tunnels for load balancing. And in IPv6
VPN networking,the S7700 does not support load balancing by tunnels, that is, the number of tunnels for
load balancing is 1.
Tunnel Binding Mode
Tunnel binding indicates that a certain TE tunnel can only be applied for a specific VPN service.
, two MPLS TEs, namely, Tunnel1 and Tunnel2, are set up between
PE1 and PE3.
Figure 1-1
Networking example using VPN primary tunnel binding
TE Tunnel1 for VPNA
TE Tunnel2 for VPNB
CE1
CE3
CE2
CE4
Site4
Site1
Site2
Site3
VPNA
VPNB
VPNA
VPNB
VPN Backbone
PE1
PE3
The QoS of both VPN A and VPN B is guaranteed if you configure the VPN primary tunnel
binding, that is, binding VPN A with Tunnel 1 and binding VPN B with Tunnel 2. After the
configuration, both VPN A and VPN B use separate TE tunnels. In this manner, services of VPN
A and VPN B are not affected by each other or other services.
The VPN primary tunnel binding has the following features:
l
The VPN data to a specific peer PE is always transmitted through the bound TE tunnel.
l
The bound TE tunnel cannot be used in select-sequence mode or in load balancing.
l
VPN primary tunnel binding can only use the bound primary tunnel for the specific peer
PE. Other peer PEs, however, adopt the default tunnel policy.
You can arrange network resources by creating MPLS TE tunnels of different QoS features.
Then you can manually configure each TE tunnel to carry the corresponding VPN service.
Therefore, network resources can be optimally used.
1.3 Configuring a Tunnel Interface
Tunnel interfaces are point-to-point virtual interfaces that are used for encapsulating packets.
Similar to loopback interfaces, tunnel interfaces are logical interfaces.
Quidway S7700 Smart Routing Switch
Configuration Guide - VPN
1 VPN Tunnel Management Configuration
Issue 01 (2011-07-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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