Supported Platforms
Related Documentation
- ACX, M, PTX, T Series
- Disabling Normal TTL Decrementing
- ACX, M, MX, PTX, T Series
- Example: Disabling Normal TTL Decrementing in a VRF Routing Instance (on Layer 3 VPNs Feature Guide for Routing Devices or in the Junos VPNs Configuration Guide)
- M, MX, PTX, SRX, T Series
- no-decrement-ttl
no-propagate-ttl
Syntax
Hierarchy Level
Release Information
Statement introduced before Junos OS Release 7.4.
Description
Disable normal time-to-live (TTL) decrementing. You configure this statement once per router, and it affects all RSVP-signaled or LDP-signaled LSPs. When this router acts as an ingress router for an LSP, it pushes an MPLS header with a TTL value of 255, regardless of the IP packet TTL. When the router acts as the penultimate router, it pops the MPLS header without writing the MPLS TTL into the IP packet.
When you add the no-propagate-ttl statement to the configuration or delete it from the configuration, the effect takes place immediately. There is no need to clear existing RSVP LSPs or LDP sessions.
Default
Normal TTL decrementing enabled; the TTL field value is decremented by 1 as the packet passes through each label-switched router in the LSP.
Required Privilege Level
routing—To view this statement in the configuration.
routing-control—To add this statement to the configuration.
Related Documentation
- ACX, M, PTX, T Series
- Disabling Normal TTL Decrementing
- ACX, M, MX, PTX, T Series
- Example: Disabling Normal TTL Decrementing in a VRF Routing Instance (on Layer 3 VPNs Feature Guide for Routing Devices or in the Junos VPNs Configuration Guide)
- M, MX, PTX, SRX, T Series
- no-decrement-ttl
Published: 2013-07-31
Supported Platforms
Related Documentation
- ACX, M, PTX, T Series
- Disabling Normal TTL Decrementing
- ACX, M, MX, PTX, T Series
- Example: Disabling Normal TTL Decrementing in a VRF Routing Instance (on Layer 3 VPNs Feature Guide for Routing Devices or in the Junos VPNs Configuration Guide)
- M, MX, PTX, SRX, T Series
- no-decrement-ttl
