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Disabling Normal TTL Decrementing for VPNs

To diagnose networking problems related to VPNs, it can be useful to disable normal time-to-live (TTL) decrementing. In JUNOS, you can do this with the no-propagate-ttl and no-decrement-ttl statements. However, when you are tracing VPN traffic, only the no-propagate-ttl statement is effective.

For the no-propagate-ttl statement to have an effect on VPN behavior, you need to clear the PE-router-to-PE-router BGP session, or disable and then enable the VPN routing instance.

For more information about the no-propagate-ttl and no-decrement-ttl statements, see the JUNOS MPLS Applications Configuration Guide.

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