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Cisco Bug: CSCum40654 - Import paths with the same next-hop

Last Modified

Feb 28, 2014

Products (16)

  • Cisco IOS
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901S-2SG-F-D Router
  • Cisco ASR 901-6CZ-FT-A Router
  • Cisco ASR 901-12C-FT-D Router
  • Cisco ME 3600X-24FS-M Switch
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Known Affected Releases

15.4(1)S

Description (partial)

Symptom:
The router imports to local RD from other RD same next-hop path for 2nd path when it used "import path limit 2".

<Other RD>
1. 10.240.31.14 (metric 35150) from 10.64.252.4
2. 10.240.31.13 (metric 33651) from 10.64.252.3
3. 10.240.31.14 (metric 35150) from 10.64.252.2
4. 10.240.31.13 (metric 33651) from 10.64.252.1 <----- Best path

<Local RD>
If Local RD import 2 path from Other RD table,
the first import path is #4. Because #4 is best path.
the second import path is #2, but this is NOT appropriate.
Because #2 is same next-hop as #4.

This seem after reload or clear ip bgp *.

Conditions:
The import path selection all does not make any distinction and imports paths to the configured limit.
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Bug Details Include

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