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Cisco Bug: CSCvi71376 - OSPF SSPF: tilfa ALGORITHM fails to compute repair path, reports incorrect reason of too many labels

Last Modified

Aug 10, 2018

Products (147)

  • Cisco IOS
  • Cisco Catalyst 9300-48P-A Switch
  • Cisco Catalyst 3650-48TQ-L Switch
  • Cisco Catalyst 9410R Switch
  • Cisco Catalyst 3850-24U-S Switch
  • Cisco Catalyst 3850-24U-L Switch
  • Cisco Catalyst 9300-48U-A Switch
  • Cisco Catalyst 3850-48XS-E Switch
  • Cisco Catalyst 3850-48XS-F-S Switch
  • Cisco 4221 Integrated Services Router
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Known Affected Releases

Fuji-16.9.1

Description (partial)

Symptom:
OSPF TILFA post convergence path is not getting calculated for certain prefixes
and it is incorrectly reporting too many labels required (requires 255 labels
available 10), even though repair path needs only one label.

Conditions:
OSPFv2 is configured.
OSPFv2 Segment-Routing is configured.
OSPFv2 fast-reroute per-prefix enable is configured.
OSPFv2 fast-reroute per-prefix ti-lfa is configured.
Anycast prefix exist in the area
Anycast prefix is attached to the firsthop nbr and a repair node in the ti-lfa repair path
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Bug Details Include

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  • Status
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