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Cisco Bug: CSCus56036 - BGP tracebacks or FD read errors along with session flaps

Last Modified

Dec 31, 2018

Products (1)

  • Cisco MDS 9000 NX-OS and SAN-OS Software

Known Affected Releases

6.2(10)E3 6.2(2) 7.0(3)I2(1)

Description (partial)

BGP session would continuosly flap with FD read error syslogs. fd Read error is the signature of this defect with varying error no :-

Switch %BGP-5-ADJCHANGE:  bgp-65111 [5639] (default) neighbor 10.x.x.x Down - fd read error


bgp 65111 [5639]: [5717]: (default) EVT: Read error from peer 10.x.x.x: No buffer space available

BGP tracebacks can be seen as well  but not necessary

Reload of chassis 




Module Reload  


Interface flap
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