Application Note: Configuring the IPLink™ Router for Dual Routed Application
2
WAN port 2 and the Ethernet port are on the 10.10.9.0/24 subnet, so traffic is bridged betwween the two
interface ports. However IP traffic is routed between Subnet 1 and Subnet 2.
NAT configuration sets WAN port 1 as the “external” environment. WAN port 2 and the Ethernet port are
“internal” and the firewall would be configured to protect users in the main and remote offices.
PPP or Frame Relay.
Either PPP or Frame Relay communication links may be used. In this example, WAN port 1 is configured as a
routed PPP connection. WAN port 2 is bridged PPP because the users in the main office (on the IPLink’s
Ethernet) and the users in the remote office are on the same subnet, hence a bridged connection is the correct
selection.
Detailed Information
You will need the following information to correctly define the configurable parameters for this IPLink appli-
cation.
Upstream Router Details
The upstream router provides access to the Internet and has the following characteristics.
•
Channelized E1 (G.703/G.704)
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HDB3 line coding
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120 Ohm twisted pair connection
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As master clock, the upstream router provides the clock to the 2620 WAN port 1.
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Time Slots: 1 - 31
•
WAN Service
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Routed PPP
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Assumes that the 2620 is configured with a fixed IP address assigned by the ISP
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Router IP address & subnet mask: 192.168.1.1/24
2620/KK WAN Port 1 configuration parameters
These are the configurable parameters for WAN port 1 on the 2620/KK IPLink.
•
Channelized E1 (G.703/G.704)
-
HDB3 line coding
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120 Ohm twisted pair connection
-
Clocking mode-derived from the E1 (Receive Clock)
-
Time Slots: 1-31
•
WAN Service
-
Routed PPP
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Interface 1 (WAN Port 1)
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Local WAN IP address and subnet mask: 192.168.1.2/24
