N7K not able to detect SFP

[pokwan]

Hi,

We have a problem with the N7K not able to detect the sfp we inserted to certain ports on the module.

For instance,

on port e1/41 to e1/44 or e2/41 to e2/43 --> it is not working. The log did not have any messages that the sfp has been inserted

the same sfp (10Gbase-SR) was inserted to e1/39 and this works.

We have port e2/44 with an sfp that works (1000base-T)

vdc DATA id 2

  limit-resource module-type f2

  allocate interface Ethernet1/1-44

  allocate interface Ethernet2/1-44

  boot-order 1

  limit-resource vlan minimum 16 maximum 4094

  limit-resource monitor-session minimum 0 maximum 2

  limit-resource monitor-session-erspan-dst minimum 0 maximum 23

  limit-resource vrf minimum 2 maximum 4096

  limit-resource port-channel minimum 0 maximum 768

  limit-resource u4route-mem minimum 8 maximum 8

  limit-resource u6route-mem minimum 4 maximum 4

  limit-resource m4route-mem minimum 8 maximum 8

  limit-resource m6route-mem minimum 5 maximum 5

  limit-resource monitor-session-inband-src minimum 0 maximum 1

  limit-resource anycast_bundleid minimum 0 maximum 16

  limit-resource monitor-session-mx-exception-src minimum 0 maximum 1

  limit-resource monitor-session-extended minimum 0 maximum 12

Can you advise?

TIA

PF

[Paul Chapman]

Hi PF -

Can you post the following:

show run interface e1/41-44, e2/41-44
show interface e1/41-44, e2/41-44 status

PSC

[pokwan]

Paul,

Thanks for your reply.  As requested

interface Ethernet1/41

interface Ethernet1/42

interface Ethernet1/43

interface Ethernet1/44

interface Ethernet2/41

interface Ethernet2/42

interface Ethernet2/43

interface Ethernet2/44
  description xxx
  switchport
  switchport access vlan 14
  spanning-tree port type edge
  mtu 9216
  no shutdown

Eth1/41          --              sfpAbsent routed    auto    auto    --
Eth1/42          --              disabled  routed    auto    auto    1000base-T
Eth1/43          --              disabled  routed    auto    auto    1000base-T
Eth1/44          --              disabled  routed    auto    auto    1000base-T

E1/42 - 1/44 does not have any sfp inserted.  I can't remember if we have at some stage inserted an baseT sfp and have them removed after.  Anyway there is no sfp there now.  Even if an SR sfp is inserted, it still shows the same as above. 

Eth2/41          --              sfpAbsent routed    auto    auto    --
Eth2/42          --              sfpAbsent routed    auto    auto    --
Eth2/43          --              sfpAbsent routed    auto    auto    --
Eth2/44          xxx           connected 14        full    a-1000  1000base-T

Same with e2/41 -2/43, when a SR sfp is inserted, the display is still --. 

Sorry I have a typo in my post before. 

the same sfp (10Gbase-SR) was inserted to e1/39 and this works -> should be e1/29

Thanks.

PF

[Paul Chapman]

Hi PF -

So if you insert an SFP-10G-SR into e1/41 you still show "sfpAbsent" in the show interface status?

Are you doing this yourself, or are you having remote-hands do it for you?  In either case, have you used the locator-led or beacon features to ensure that you are trying the correct switch, module, and port?

locator-led module 1

The command above lights the blue light on the blade.

interface e1/41
 beacon

The command above causes the port-light to flash between yellow and green

PSC

[pokwan]

Paul,

Have the locator-led and beacon on the interface on.  The blue module light is on and so is the interface light flashing.  After inserting the sfp (still in port e1/41), a sh int status

Eth1/41          --              sfpAbsent routed    auto    auto    --

Thanks.

PF

[Paul Chapman]

Hi -

One more question before I refer you to TAC.  Can you provide a "show vdc membership"?

PSC

[pokwan]

Paul,

A sho vdc membership below

sh vdc membership
Flags : b - breakout port
---------------------------------

vdc_id: 0 vdc_name: Unallocated interfaces:
        Ethernet1/45          Ethernet1/46          Ethernet1/47
        Ethernet1/48

        Ethernet2/45          Ethernet2/46          Ethernet2/47
        Ethernet2/48

        Ethernet7/7           Ethernet7/8           Ethernet7/13
        Ethernet7/14          Ethernet7/15          Ethernet7/16
        Ethernet7/17          Ethernet7/18          Ethernet7/19
        Ethernet7/20          Ethernet7/21          Ethernet7/22
        Ethernet7/23          Ethernet7/24

vdc_id: 1 vdc_name: TP-H7-CSW-01 interfaces:

vdc_id: 2 vdc_name: DATA interfaces:
        Ethernet1/1           Ethernet1/2           Ethernet1/3
        Ethernet1/4           Ethernet1/5           Ethernet1/6
        Ethernet1/7           Ethernet1/8           Ethernet1/9
        Ethernet1/10          Ethernet1/11          Ethernet1/12
        Ethernet1/13          Ethernet1/14          Ethernet1/15
        Ethernet1/16          Ethernet1/17          Ethernet1/18
        Ethernet1/19          Ethernet1/20          Ethernet1/21
        Ethernet1/22          Ethernet1/23          Ethernet1/24
        Ethernet1/25          Ethernet1/26          Ethernet1/27
        Ethernet1/28          Ethernet1/29          Ethernet1/30
        Ethernet1/31          Ethernet1/32          Ethernet1/33
        Ethernet1/34          Ethernet1/35          Ethernet1/36
        Ethernet1/37          Ethernet1/38          Ethernet1/39
        Ethernet1/40          Ethernet1/41          Ethernet1/42
        Ethernet1/43          Ethernet1/44

        Ethernet2/1           Ethernet2/2           Ethernet2/3
        Ethernet2/4           Ethernet2/5           Ethernet2/6
        Ethernet2/7           Ethernet2/8           Ethernet2/9
        Ethernet2/10          Ethernet2/11          Ethernet2/12
        Ethernet2/13          Ethernet2/14          Ethernet2/15
        Ethernet2/16          Ethernet2/17          Ethernet2/18
        Ethernet2/19          Ethernet2/20          Ethernet2/21
        Ethernet2/22          Ethernet2/23          Ethernet2/24
        Ethernet2/25          Ethernet2/26          Ethernet2/27
        Ethernet2/28          Ethernet2/29          Ethernet2/30
        Ethernet2/31          Ethernet2/32          Ethernet2/33
        Ethernet2/34          Ethernet2/35          Ethernet2/36
        Ethernet2/37          Ethernet2/38          Ethernet2/39
        Ethernet2/40          Ethernet2/41          Ethernet2/42
        Ethernet2/43          Ethernet2/44

vdc_id: 3 vdc_name: OTV interfaces:
        Ethernet7/1           Ethernet7/2           Ethernet7/3
        Ethernet7/4           Ethernet7/5           Ethernet7/6

vdc_id: 4 vdc_name: POL interfaces:
        Ethernet7/9           Ethernet7/10          Ethernet7/11
        Ethernet7/12

Thanks.

PF

[Paul Chapman]

Hi -

Yeah, that looks fine.  If the SFP works in e1/29, but not in e1/41, then there's not many possibilities left.  The only possibilities I see are problem with the linecard, power restriction, or a code bug.  I recommend a TAC case to see what they say.

PSC

[pokwan]

Paul,

Will log a call.  Thanks very much for your help.

PF

[Tausif Gaddi]

Use the show interface command to verify that the switch detected a problem and disabled the port.

switch# show interface e1/14 
e1/7 is down (errDisabled) 

[pokwan]

Tausif,

The sfp is still in e1/41.  A sh int e1/41 below

sh int e 1/41
Ethernet1/41 is down (SFP not inserted)
admin state is down, Dedicated Interface
  Hardware: 1000/10000 Ethernet, address: d867.d902.3c42 (bia d867.d904.0244)
  MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec
  reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, medium is broadcast
  Port mode is routed
  auto-duplex, auto-speed
  Beacon is turned off
  Auto-Negotiation is turned on
  Input flow-control is off, output flow-control is off
  Auto-mdix is turned on
  Switchport monitor is off
  EtherType is 0x8100
  EEE (efficient-ethernet) : n/a
  Last link flapped never
  Last clearing of "show interface" counters 118w3d
  0 interface resets
  Load-Interval #1: 30 seconds
    30 seconds input rate 0 bits/sec, 0 packets/sec
    30 seconds output rate 0 bits/sec, 0 packets/sec
    input rate 0 bps, 0 pps; output rate 0 bps, 0 pps
  Load-Interval #2: 5 minute (300 seconds)
    300 seconds input rate 0 bits/sec, 0 packets/sec
    300 seconds output rate 0 bits/sec, 0 packets/sec
    input rate 0 bps, 0 pps; output rate 0 bps, 0 pps
  RX
    332820 unicast packets  0 multicast packets  0 broadcast packets
    318636 input packets  198831360 bytes
    0 jumbo packets  0 storm suppression packets
    0 runts  0 giants  0 CRC/FCS  0 no buffer
    0 input error  0 short frame  0 overrun   0 underrun  0 ignored
    0 watchdog  0 bad etype drop  0 bad proto drop  0 if down drop
    0 input with dribble  0 input discard
    0 Rx pause
  TX
    332820 unicast packets  0 multicast packets  0 broadcast packets
    318636 output packets  198828864 bytes
    0 jumbo packets
    0 output error  0 collision  0 deferred  0 late collision
    0 lost carrier  0 no carrier  0 babble  0 output discard
    0 Tx pause

Thanks.

PF