1.8.2 Debugging a Tunnel................................................................................................................................29

1.9 Configuration Examples...................................................................................................................................29

1.9.1 Example for Configuring Tunnel Policies for the L3VPN......................................................................29

1.9.2 Example for Binding a Tunnel to the Martini L2VPN............................................................................42

2 GRE Configuration.....................................................................................................................57

2.1 Introduction to GRE.........................................................................................................................................59

2.2 GRE Features Supported by the S7700............................................................................................................59

2.3 Configuring GRE..............................................................................................................................................61

2.3.1 Establishing the Configuration Task.......................................................................................................61

2.3.2 Configuring a Tunnel Interface...............................................................................................................61

2.3.3 Configuring Routes for the Tunnel..........................................................................................................63

2.3.4 Checking the Configuration.....................................................................................................................64

2.4 Configuring a GRE Tunnel Between CE and PE.............................................................................................65

2.4.1 Establishing the Configuration Task.......................................................................................................65

2.4.2 Configuring the GRE Tunnel Interface on CE........................................................................................66

2.4.3 Configuring the GRE Tunnel Interface on PE.........................................................................................67

2.4.4 Binding the GRE Tunnel with the VPN to Which CE belongs on PE....................................................68

2.4.5 Checking the Configuration.....................................................................................................................69

2.5 Configuring the Keepalive Function................................................................................................................70

2.5.1 Establishing the Configuration Task.......................................................................................................70

2.5.2 Enabling the Keepalive Function............................................................................................................71

2.5.3 Checking the Configuration.....................................................................................................................72

2.6 Maintaining GRE..............................................................................................................................................73

2.6.1 Resetting the Statistics of a Tunnel Interface..........................................................................................73

2.6.2 Monitoring the Running Status of GRE..................................................................................................73

2.6.3 Debugging GRE......................................................................................................................................74

2.7 Configuration Examples...................................................................................................................................74

2.7.1 Example for Configuring Static Routes on the GRE Tunnel..................................................................74

2.7.2 Example for Configuring the Dynamic Routing Protocol on the GRE Tunnel.......................................79

2.7.3 Example for Configuring the CE to Access a VPN Through a GRE Tunnel of the Public Network

..........................................................................................................................................................................84

2.7.4 Example for Configuring the Keepalive Function for GRE....................................................................92

3 BGP MPLS IP VPN Configuration..........................................................................................95

3.1 Introduction to BGP/MPLS IP VPN................................................................................................................97

3.2 BGP/MPLS IP VPN Features Supported by the S7700...................................................................................97

3.3 Configuring a VPN Instance.............................................................................................................................99

3.3.1 Establishing the Configuration Task.....................................................................................................100

3.3.2 Creating a VPN Instance.......................................................................................................................100

3.3.3 Configuring Attributes for the VPN Instance .......................................................................................101

3.3.4 (Optional) Applying a Tunnel Policy to the VPN Instance...................................................................103

3.3.5 (Optional) Configuring MPLS Label Allocation Based on the VPN Instance......................................103

3.3.6 Checking the Configuration...................................................................................................................104

Issue 01 (2011-07-15)

Huawei Proprietary and Confidential

Contents

Table of Contents