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Cisco Bug: CSCur15901 - N2K-C2348UPQ FEX does not come up due to "SDP timeout/SFP Mismatch"

Last Modified

Sep 12, 2018

Products (1)

  • Cisco Nexus 5000 Series Switches

Known Affected Releases

7.2(0)IPS(0.33)

Description (partial)

Symptom:
A Nexus N2K-C2348UPQ-10GE FEX connected to a Nexus 5K/6K parent might not come up at all or intermittently fail to come up after reloads. A show interface on the parent switch will indicate the FEX fabric interfaces to be in SDP timeout/SFP Mismatch state

N6K(config-if-range)# show int eth 1/21-28 brief
--------------------------------------------------------------------------------
Ethernet      VLAN    Type Mode   Status  Reason                   Speed     PortInterface     Ch #
--------------------------------------------------------------------------------
Eth1/21       1       eth  fabric down    SDP timeout/SFP Mismatch    10G(D) --
Eth1/22       1       eth  fabric down    SDP timeout/SFP Mismatch    10G(D) --
Eth1/23       1       eth  fabric down    SDP timeout/SFP Mismatch    10G(D) --
Eth1/24       1       eth  fabric down    SDP timeout/SFP Mismatch    10G(D) --
Eth1/25       1       eth  fabric down    SDP timeout/SFP Mismatch    10G(D) --
Eth1/26       1       eth  fabric down    SDP timeout/SFP Mismatch    10G(D) --
Eth1/27       1       eth  fabric down    SDP timeout/SFP Mismatch    10G(D) --
Eth1/28       1       eth  fabric down    SDP timeout/SFP Mismatch    10G(D) --

Conditions:
Seen in a N2K-C2348UPQ-10GE FEX connected to a Nexus 5K/6K
Seen in a N2K-C2248PQ-10GE FEX connected to a Nexus 7K
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