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Cisco Bug: CSCvs72694 - ASR-920-12SZ-IM: Dual rate ports coming up with 1G SFP when 1G IM activated

Last Modified

Aug 29, 2020

Products (1)

  • Cisco ASR 920 Series Aggregation Services Router

Known Affected Releases


Description (partial)

Some of the dual rate ports (Te0/0/12 - 15) might come up when 1G transceiver is inserted but the traffic is not being forwarded.
The interfaces are actually programmed in the hardware as 10G ports as confirmed in the output of "show platform hardware pp active interface all"

show platform hardware pp active interface all
Name: TenGigabitEthernet0/0/12, Asic: 0, hwidx(inpd/inl2id): 26
port_flags: 1, port_speed: 10000 Mbps, efp_count: 0, destIndex: 26, intType: 1  <<<<<<< port speed 10000Mbps

show interfaces

TenGigabitEthernet0/0/12 is up, line protocol is up
  Hardware is 12xGE-4x10GE-FIXED, address is 1880.9041.020c (bia 1880.9041.020c)
  Full Duplex, 1000Mbps, link type is auto, media type is T                <<<<<<< speed 1000Mbps

ASR-920U-12SZ-IM or ASR-920-12SZ-IM with one of the 1G IM cards installed (A900-IMA8T1Z,A900-IMA8S1Z,A900-IMA8T,A900-IMA8S) and 1G SFP inserted in a dual rate port (Te0/0/12 - 15).
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