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Cisco Bug: CSCuo22860 - TCAM UDP port-id overwritten by GTP TEID when GTP is enabled globally

Last Modified

Jan 27, 2017

Products (15)

  • Cisco Carrier Routing System
  • Cisco CRS-1 Line Card Chassis (Dual)
  • Cisco CRS-1 Line Card Chassis (Multi)
  • Cisco CRS-1 16-Slot Line Card Chassis
  • Cisco CRS-3 Multishelf System
  • Cisco CRS-1 4-Slot Single-Shelf System
  • Cisco IOS XR Software
  • Cisco CRS-1 8-Slot Line Card Chassis
  • Cisco CRS-1 Fabric Card Chassis
  • Cisco CRS-3 16-Slot Single-Shelf System
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Known Affected Releases

4.2.4.BASE

Description (partial)

Symptom:IPv6 ACL entry for UDP port 2152 fails to match the GTPu traffic and eventually gets denied by the deny ipv6 any any entry at the end of the ACL.  

Conditions:The issue can be seen if all of the following conditions are met,
1.CRS router is running IOS XR release 4.2.3 or greater.
2.7-tuple load balancing is enabled using the command cef load-balancing fields L4.
3.GTPu traffic filtering is performed using an IPv6 ACL with the UDP port 2152.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Known Fixed Releases
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