Juniper ACX1000 Configuration Manual page 644

ACX Series Universal Access Router Configuration Guide
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To set the time-to-live (TTL) field that is included in the encapsulating header, include
the statement. If you explicitly configure a TTL value for the tunnel, you must configure
ttl
it to be one larger than the number of hops in the tunnel. For example, if the tunnel has
seven hops, you must configure a TTL value of 8.
You must configure at least one family on the logical interface.
A configured tunnel cannot go through Network Address Translation (NAT) at any point
along the way to the destination. For more information, see Examples: Configuring Unicast
Tunnels and the MPLS Applications Feature Guide.
Understanding Generic Routing Encapsulation on ACX Series on page 581
Configuring Generic Routing Encapsulation Tunneling on ACX Series on page 584
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