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Cisco Bug: CSCuj95304 - XR:4.3.1: Unable to disable MPLS TTLpropagation

Last Modified

Jul 21, 2018

Products (7)

  • Cisco Carrier Routing System
  • Cisco ASR 9922 Router
  • Cisco IOS XR Software
  • Cisco ASR 9010 Router
  • Cisco ASR 9006 Router
  • Cisco ASR 9001 Router
  • Cisco ASR 9912 Router

Known Affected Releases

4.3.1.BASE 5.1.1.BASE

Description (partial) 

Symptom:
Disabling the MPLS TTL propagation for locally generated packets via "mpls ip-ttl-propagation disable local" global config on asr9k platform is not working.

Conditions:
This issue will be seen :

1)Only for mpls configuration
2) only for locally generated packets
3) if there is an outgoing label or explicit NULL.

As a result of this bug we see IP-TTL will still be propagated to MPLS-TTL if there is an outgoing label/Explicit Null.
Example: Traceroute, BGP etc
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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