3Com MSR 50 Series Configuration Manual page 1539

Network diagram
Figure 428 Configure multi-role host
S2/1
1.1.1 .1/24
S 2/0
1 .1.1.2/24
CE 1
VPN 1
Eth1/1
110.1.1 .1/24
Host A
110.1.1.2 /24
Configuration procedure
1 Configure CE 1
# Configure the IP addresses of the interfaces on CE 1.
<CE1> system-view
[CE1] interface ethernet 1/1
[CE1-Ethernet1/1] ip address 100.1.1.1 24
[CE1-Ethernet1/1] quit
[CE1] interface serial 2/0
[CE1-Serial2/0] ip address 1.1.1.2 24
[CE1-Serial2/0] quit
# Configure a default route to PE 1 on CE 1.
[CE1] ip route-static 0.0.0.0 0 1.1.1.1
2 Configure PE 1
# Create a VPN instance for VPN 1 and VPN 2 respectively on PE 1 and configure
different RDs and VPN targets attributes for the VPN instances.
<PE1> system-view
[PE1] ip vpn-instance vpn1
[PE1-vpn-instance-vpn1] route-distinguisher 100:1
[PE1-vpn-instance-vpn1] vpn-target 100:1 both
[PE1-vpn-instance-vpn1] quit
[PE1] ip vpn-instance vpn2
[PE1-vpn-instance-vpn2] route-distinguisher 100:2
[PE1-vpn-instance-vpn2] vpn-target 100:2 both
[PE1-vpn-instance-vpn2] quit
# Bind the interface of PE 1 that is connected with CE 1 to VPN instance vpn1.
[PE1] interface serial 2/1
[PE1-Serial2/1] ip binding vpn-instance vpn1
MPLS L3VPN Configuration Example
MPLS backbone
PE 1
S2/0
2.1.1.1 /24
2 .1.1.2/24
PE 2
S2/0
S2/1
3.1.1.2 /24
S 2/0
3.1.1.1 /24
CE 2
VPN 2
Eth1/1
110 .1.1.1/24
Host B
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