Description:
In scenarios with a WLAN point-to-point connection between two sites, the =
failure of the P2P link could cause production downtime.
In this case it is worthwhile for the P2P link to have a backup over a VPN=
connection. This requires both locations to have an Internet connection.
This article describes how to set up a P2P link and create a VPN connectio=
n as a backup for the P2P link.
Requirements: <=
br>
- Both sites already have a configured and functional Internet connection=
- Both sites have separate IP address ranges
Scenario:
1) The P2P =
link is implemented with separate access points
- There are two sites: Each site has an access point and a router.
- The access points support the P2P link
- The routers use the P2P link between the access points to establish a p=
lain Ethernet connection (IPoE).
- If the P2P link fails, a VPN connection is established between the two =
sites.
2) The P=
2P link is established using the WLAN module integrated in the router
- There are two sites: Each site has a WLAN router.
- The WLAN routers implement the P2P link
- The routers use the P2P link between them to establish a plain Ethernet=
connection (IPoE).
- If the P2P link fails, a VPN connection is established between the two =
sites.
Procedur=
e:
Scenario 1: The P2P link is implemented with se=
parate access points
Configuration at site A:<=
/strong>
1) Configuring router A:
1.1) Set up a VPN connection to router B using the Setup =
Wizard.=20
1.2) Set up a plain Ethernet connection (IPoE). <=
/a>
IP parameters
transfer network
communications between routers A and B
- IP address: Give router A an =
IP address from the transfer network.
- Netmask: Enter the netmask of the transfer net=
work.
- Default gateway: Enter the IP address of route=
r B in the transfer network (see step 3.2=
.1).
Important:
The IP address range of the tr=
ansfer network must not be in use at site A or site B, otherwise problems w=
ith routing will occur!
Leave the current default route
- to use the current Internet connection.
1.3) Open the configuration of the router in LANconfig and switch to the m=
enu item IP router -> Routing -> IPv4 routing table.=
routing entry of the VPN connection to site B
Router
IPoE remote site
step 1.2
Important:
IP masquerading
IP masquerading switched off
1.4) Navigate to the menu Communication -> Call Management ->=
; Backup table.
- 1.4.1) Store the following parameters:
- Remote site: From the drop-down menu, select the IPoE connection
you created in step 1.2.
- Backup list: Select the VPN remote site (see Step 1.1).
1.5) Navigate to the menu Communication -> Protocols -> Poll=
ing table.
Note:
If you are using =
an IPoE or DHCPoE connection, ICMP polling must be set up for line monitori=
ng. Otherwise, no backup connection will be established.
- 1.5.1) Create a new entry and enter the following parameters:
- Remote site: From the drop-down menu, select the IPoE connection
created in step 1.2.
- IP address 1: Enter the IP address of router B=
in the transfer network (see step 3.2.1).
1.6) Write the configuration back to the router. This concludes the config=
uration of router A.
2) Configuring access point A:
Important:
The access point must =
be connected to the router=E2=80=99s DSL port.
2.1) Open the configuration for the access point in LANconfig and switch t=
o the menu item IPv4 -> General -> IP networks.
<=
br>
INTRANET
IP address from the transfer network
- to access point A and enter the relevant
netmask
2.2) Write the configuration back to the access point.
2.3) Set up a WLAN point-to-point link.
2.4) The configuration of access point A is complete.
Configuration at site B:
3) Configuring router =
B:
3.1) Set up a VPN connection to router B using the Setup =
Wizard.
3.2) Set up a plain Ethernet connection (IPoE).=
IP parameters
transfer network
communications between routers A and B
- IP address: Give router B an =
IP address from the transfer network.
- Netmask: Enter the netmask of the transfer net=
work.
- Default gateway: Enter the IP address of route=
r A in the transfer network (see step 1.2=
.1).
Important: The IP address range of the tr=
ansfer network must not be in use at site A or site B, otherwise problems w=
ith routing will occur! <=
br>
Leave the current default route
- to use the current Internet connection.
3.3) Open the configuration of the router in LANconfig and switch to the m=
enu item
IP router -> Routing -> IPv4 routing table.=
routing entry of the VPN connection to site A
Router
IPoE remote site
step 3.2
Important:
IP masquerading
IP masquerading switched off
3.4) Navigate to the menu
Communication -> Call Management ->=
; Backup table.
- 3.4.1) Store the following parameters:
- Remote site: From the drop-down menu, select the IPoE connection you created in step 3.2.
- Backup list: Select the VPN remote site (see step 3.1).
3.5) Navigate to the menu
Communication -> Protocols -> Poll=
ing table.
Note: If you are using =
an IPoE or DHCPoE connection, line monitoring by means of ICMP polling must=
be set up. Otherwise, no backup connection will be established. <=
br>
- 3.5.1) Create a new entry and enter the following parameters:
- Remote site: From the drop-down menu, select the IPoE connection created in step 3.2.
- IP address 1: Enter the IP address of router A=
in the transfer network (see step 1.2.1).
3.6) Write the configuration back to the router. This concludes the config=
uration of router B.
4) Configuring access point B:<=
/strong>
Important:
The access point m=
ust be connected to the router=E2=80=99s DSL port.
4.1) Open the configuration for the access point in LANconfig and switch t=
o the menu item IPv4 -> General -> IP networks.
<=
br>
INTRANET
IP address from the transfer network
access point B
netmask
4.2) Write the configuration back to the access point.
4.3) Set up a WLAN point-to-point link.
4.4) The configuration of access point B is complete.=20
Scenario 2: The P2P link is established using the WL=
AN module integrated in the router
The configuration of the two routers corresponds to that of scenar=
io 1. Some additional adjustments still have to be made.
The following steps must be performed on both routers.
1) Set up a WLAN point-to-point link.
2) Switch to the menu Interfaces -> WAN -> Interface setting=
s -> DSLoL.
LAN interface
- , use the drop-down menu to select the
P2P interface
3) Switch to the menu Communication -> Remote sites -> Remot=
e sites (DSL).
IPoE remote site
steps 1.2 and 3.2
DSL port
DSLoL
- Router with four LAN ports: DSL port 5
- Router with two LAN ports: DSL port 2