Symptom

A Nexus

N2K-C2348TQ-10GE

or

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-C2348TQ-10GE

or

N2K-C2348UPQ-10GE

FEX connected to a Nexus 5K/6K. This issue is resolved in NX-OS

7.1(1)N1(1)

Workaround

Upgrade the parent N5K/6K to NX-OS

7.1(1)N1(1)

and power cycle the the FEX few times with fabric connection to the parent in place. If the FEX does not come online contact TAC

Further Problem Description