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Virtual Private Networks (VPN)
f. (Optional) Enable keepalive reply to enable the device to reply to Cisco GRE keepalive
packets.
g. (Optional) Enable open routing to enable packets destined for an address which is not
explicitly in the routing table to exit the IP tunnel.
4. Assign an IP address to the IP tunnel:
a. Click Network > Interfaces.
b. For Add Interface, type a name for the interface and click .
c. For Zone, select Internal.
d. For Device, select the IP tunnel created above.
e. Click to expand IPv4.
f. For Address, type the IP address and netmask of the tunnel. The netmask must be set to
/32.
5. Configure NHRP:
a. Click Network > Routing Services.
b. Enable routing services.
c. Click to expand NHRP.
d. Enable NHRP.
e. Click to expand Network.
TX40 User Guide
Dynamic Multipoint VPN (DMVPN)
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