Example for Configuring LTE Cellular Interfaces to Use the Multi-APN Function for Data and VoIP Communication
Networking Requirements
A remote branch of the enterprise cannot obtain wired WAN access service, and needs to exchange heavy traffic with the headquarters. The branch wants to communicate with the headquarters through the Internet. In addition, the branch also wants to exchange voice services with the headquarters at a low cost, so VoIP communication needs to be used.
The branch intranet is on the network segment 192.168.100.0/24 and all hosts join VLAN 10. The branch requires that the Router should assign IP addresses to branch intranet users and the users access external networks.
A remote branch of the enterprise cannot obtain the wired WAN access service to provide data and VoIP communication. As shown in Figure 12-14, the branch uses the Router as the egress gateway and uses an LTE cellular interface to connect to the PGW through the LTE network, meeting service transmission requirements. The PGW connects to the Internet through the Internet gateway and connects to the IMS network through the IMS gateway.
APNs and dialer number are provided by the carrier.
Configuration Roadmap
The enterprise branch can use the multi-APN function of LTE cellular interfaces to implement data and VoIP communication. Two LTE channel interfaces can be configured for an LTE cellular interface. You can bind two different APN profiles respectively to the two LTE channel interfaces. One APN connects to the Internet for data communication, and the other connects to the IMS network for VoIP communication. The PGW assigns an IP address to each LTE channel interface of the LTE cellular interface.
The configuration roadmap is as follows:
- Create two APN profiles. One profile is named the APN connecting to the Internet, and the other is named the APN connecting to the IMS network.
- Configure an LTE cellular interface, configure a network connection mode for the interface, and enable the multi-APN function.
- Configure C-DCC for dial-up connection on the LTE channel interfaces.
- Bind the APN profiles to the LTE channel interfaces.
- Configure the enterprise intranet and configure the Router to assign IP addresses to branch intranet users.
- Configure the NAT function and set the IP address of the LTE channel interface as the public IP address of the enterprise branch.
- Configure a default route and specify the LTE channel interface as the outbound interface so that traffic from the branch intranet can be forwarded to the LTE network through the LTE channel interface.
Procedure
- Configure APN profiles.
# Configure an APN profile named datanet to connect to the Internet.
<Huawei> system-view [Huawei] sysname Router [Router] apn profile datanet [Router-apn-profile-datanet] user name lte-example password cipher YsHsjx_202206 authentication-mode chap [Router-apn-profile-datanet] apn data [Router-apn-profile-datanet] quit
# Configure an APN profile named voicenet to connect to the IMS network.
[Router] apn profile voicenet [Router-apn-profile-voicenet] apn voice [Router-apn-profile-voicenet] quit
- Configure an LTE cellular interface.
# Configure a network connection mode.
[Router] interface cellular 1/0/0 [Router-Cellular1/0/0] mode lte auto
# Enable the multi-APN function on the LTE cellular interface.
[Router-Cellular1/0/0] multi-apn enable [Router-Cellular1/0/0] quit
- Configure C-DCC for dial-up connection on the LTE cellular interface.
# Configure a dialer control list.
[Router] dialer-rule [Router-dialer-rule] dialer-rule 1 ip permit [Router-dialer-rule] quit
# Configure C-DCC for dial-up connection on LTE channel interface 1 and bind the APN profile datanet to LTE channel interface 1.
[Router] interface cellular 1/0/0:1 [Router-Cellular1/0/0:1] ip address negotiate [Router-Cellular1/0/0:1] dialer enable-circular [Router-Cellular1/0/0:1] dialer-group 1 [Router-Cellular1/0/0:1] dialer timer autodial 20 [Router-Cellular1/0/0:1] dialer number *99# autodial [Router-Cellular1/0/0:1] apn-profile datanet [Router-Cellular1/0/0:1] shutdown [Router-Cellular1/0/0:1] undo shutdown [Router-Cellular1/0/0:1] quit
# Configure C-DCC for dial-up connection on LTE channel interface 2 and bind the APN profile voicenet to LTE channel interface 2.
[Router] interface cellular 1/0/0:2 [Router-Cellular1/0/0:2] ip address negotiate [Router-Cellular1/0/0:2] dialer enable-circular [Router-Cellular1/0/0:2] dialer-group 1 [Router-Cellular1/0/0:2] dialer timer autodial 20 [Router-Cellular1/0/0:2] dialer number *99# autodial [Router-Cellular1/0/0:2] apn-profile voicenet [Router-Cellular1/0/0:2] shutdown [Router-Cellular1/0/0:2] undo shutdown [Router-Cellular1/0/0:2] quit
- Configure the enterprise intranet.
# Create VLAN 10 and add Ethernet 2/0/0 to VLAN 10.
[Router] vlan 10 [Router-vlan10] quit [Router] interface ethernet 2/0/0 [Router-Ethernet2/0/0] port link-type trunk [Router-Ethernet2/0/0] port trunk allow-pass vlan 10 [Router-Ethernet2/0/0] quit
# Enable DHCP.
[Router] dhcp enable# Create a global address pool.
[Router] ip pool 4gpool [Router-ip-pool-4gpool] network 192.168.100.0 mask 255.255.255.0 [Router-ip-pool-4gpool] gateway-list 192.168.100.1 [Router-ip-pool-4gpool] quit
# Configure the interface to work in global address pool mode.
[Router] interface vlanif 10 [Router-Vlanif10] ip address 192.168.100.1 255.255.255.0 [Router-Vlanif10] dhcp select global [Router-Vlanif10] quit
- Configure the NAT function.
[Router] acl number 3002 [Router-acl-adv-3002] rule 5 permit ip source 192.168.100.0 0.0.0.255 [Router-acl-adv-3002] quit [Router] interface cellular 1/0/0:1 [Router-Cellular1/0/0:1] nat outbound 3002 [Router-Cellular1/0/0:1] quit [Router] interface cellular 1/0/0:2 [Router-Cellular1/0/0:2] nat outbound 3002 [Router-Cellular1/0/0:2] quit
- Configure a default route and specify the LTE channel interfaces as the outbound interfaces.
[Router] ip route-static 1.1.1.0 255.255.255.0 cellular 0/0/0:1 [Router] ip route-static 2.2.2.0 255.255.255.0 cellular 0/0/0:2
- Verify the configuration.
# After the configuration is complete, traffic of the branch intranet is transmitted to the LTE network through the LTE cellular interface and the branch users can exchange both data and VoIP services through the LTE cellular interface.
Example
Configuration file of the Router
# sysname Router # vlan batch 10 # dhcp enable # acl number 3002 rule 5 permit ip source 192.168.100.0 0.0.0.255 # apn profile datanet user name lte-example password cipher %^%#Xhc5=7"mU5o)7]/JST4$8\0CD`~a{O0Z~p+YWvY~%^%# authentication-mode chap apn data apn profile voicenet apn voice # interface Cellular1/0/0 multi-apn enable # interface Cellular1/0/0:1 dialer enable-circular dialer-group 1 apn-profile datanet dialer timer autodial 20 dialer number *99# autodial nat outbound 3002 modem auto-recovery dial action modem-rebootfail-times 128 modem auto-recovery services-unavailable action modem-reboot test-times 0 interval 3600 apn data ip address negotiate # interface Cellular1/0/0:2 dialer enable-circular dialer-group 1 apn-profile voicenet dialer timer autodial 20 dialer number *99# autodial nat outbound 3002 modem auto-recovery dial action modem-rebootfail-times 128 modem auto-recovery services-unavailable action modem-reboot test-times 0 interval 3600 ip address negotiate # interface Ethernet2/0/0 port link-type trunk port trunk allow-pass vlan 10 # interface Vlanif10 ip address 192.168.100.1 255.255.255.0 dhcp select global # ip pool 4gpool gateway-list 192.168.100.1 network 192.168.100.0 mask 255.255.255.0 # dialer-rule dialer-rule 1 ip permit # ip route-static 1.1.1.0 255.255.255.0 Cellular1/0/0:1 ip route-static 2.2.2.0 255.255.255.0 Cellular1/0/0:2 # return