Router A#show controllers tenGigE 0/0/0/0
Thu Nov 13 21:15:08.936 UTC
Operational data for interface TenGigE0/0/0/0:
State:
Administrative state: enabled
Operational state: Down (Reason: Remote fault, reason known to be far-end link loss)
LED state: Yellow On
Phy:
Media type: R fiber over 1310nm optics
Optics:
Vendor: CISCO-SUMITOMO
Part number: SXP3104NV-C8
Serial number: SPC181305W7
MAC address information:
Operational address: f40f.1bb0.652b
Burnt-in address: f40f.1bb0.652b
No unicast addresses in filter
Operating in multicast promiscuous mode
Autonegotiation disabled.
Operational values:
Speed: 10Gbps
Duplex: Full Duplex
Flowcontrol: None
Loopback: None (or external)
MTU: 9192
MRU: 9192
Inter-packet gap: standard (12)
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Router B#sho controllers tenGigE 0/0/0/0
Thu Nov 13 21:21:03.630 UTC
Operational data for interface TenGigE0/0/0/0:
State:
Administrative state: enabled
Operational state: Down (Reason: Link loss or low light, no loopback)
LED state: Yellow On
Phy:
Media type: R fiber over 1310nm optics
Optics:
Vendor: CISCO-SUMITOMO
Part number: SXP3104NV-C8
Serial number: SPC181305UX
MAC address information:
Operational address: 1005.ca86.4a2b
Burnt-in address: 1005.ca86.4a2b
No unicast addresses in filter
Operating in multicast promiscuous mode
Autonegotiation disabled.
Operational values:
Speed: 10Gbps
Duplex: Full Duplex
Flowcontrol: None
Loopback: None (or external)
MTU: 9192
MRU: 9192
Inter-packet gap: standard (12)
From the show commands, the problem is that Router B has a physical problem that is causing it to receive low or no power from the device its connecting to on interface TenG 0/0/0/0. In which case there will be a need to check that particular connection.
