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Cisco Bug: CSCvu29761 - Leaking of OSPF Hello packet received in P2P link

Last Modified

Jul 20, 2020

Products (67)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 93600CD-GX Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 92348GC-X Switch
  • Cisco Nexus 92160YC-X Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 3064 Switch
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Known Affected Releases

9.2(1) 9.2(2) 9.2(3) 9.2(4) 9.3(1) 9.3(2) 9.3(3) 9.3(4)

Description (partial)

OSPF Hello packets received on a P2P interface are forwarded to other OSPF enabled P2P link.
This leads to an INIT state visible on remote devices, towards a device they should never peer with.

This issue is not limited to OSPF hello packets, but applies to LL MC packets.

+ Observed on N9500 modular chassis with Broadcom linecards (at least 2 modules are required to hit the issue)

+ Affects NXOS release 9.2(1), 9.2(2), 9.2(3), 9.2(4), 9.3(1), 9.3(2), 9.3(3), 9.3(4)

+ Does not affect NXOS 7.x
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