Figure 21 Indirectly Connected Branch Offices - Nortel Contivity 1100 Configuration Manual

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122 Chapter 6 Configuring branch office tunnels

Figure 21 Indirectly connected branch offices

Local:
Remote:
172.17.20.0
255.255.255.0
172.17.21.0
255.255.255.0
In branch offices, you might have two or more branches that use the same LAN
addressing scheme. Nonetheless, users still have to communicate with one another
across the branches.
NAT allows branch office connections to eliminate problems with overlapping
addresses on both sides of the connection, and it allows you to hide the LAN
addresses. To set up branch offices with NAT, see Nortel VPN Router Security —
Firewalls, Filters, NAT, and QoS.
NN46110-500
172.17.20.0
255.255.255.0
172.17.21.0
255.255.255.0
192.149.20.0
255.255.255.0
192.149.21.0
255.255.255.0
Boston
PDN
172.19.2.30
192.155.64.2
192.149.20.0
Local:
255.255.255.0
192.149.21.0
255.255.255.0
Remote:
172.17.20.0
255.255.255.0
172.17.21.0
255.255.255.0
Note: PPP multilink is not supported with branch office tunnels. It is
only supported with end user tunnels.
Local:
Remote:
PDN
New York
192.155.65.2
Local:
172.17.20.0
255.255.255.0
172.17.21.0
255.255.255.0
192.149.20.0
Remote:
255.255.255.0
192.149.21.0
255.255.255.0
192.149.20.0
255.255.255.0
192.149.21.0
255.255.255.0
172.17.20.0
255.255.255.0
172.17.21.0
255.255.255.0
192.149.20.0
255.255.255.0
192.149.21.0
255.255.255.0
Cleveland
192.168.2.3

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