04-26-2010 09:23 AM
We have a Nexus 5010 on 4.1(3)N2(1) with a GLC-T SFP (1000BaseT) in port 1/1. I've set the speed to 1000 Mbps, the transceiver is recognized but whatever we do, the port remains " down (Link not connected)". Swapping cables or SFPs does not make any result, the link stays down.
According to the datasheet this SFP is supported but we can't get it to work.
Any ideas what could cause it?
Thanks
Peter
Ethernet1/1 is down (Link not connected)
Hardware: 1000/10000 Ethernet, address: 0005.9b70.7f88 (bia 0005.9b70.7f88)
Description: Server Ports GigEth / 10GigEth
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA
Port mode is access
auto-duplex, 1000 Mb/s, media type is 10g
Beacon is turned off
Input flow-control is off, output flow-control is off
Rate mode is dedicated
Switchport monitor is off
Last link flapped never
Last clearing of "show interface" counters 00:14:14
1 minute input rate 0 bits/sec, 0 packets/sec
1 minute output rate 0 bits/sec, 0 packets/sec
Rx
0 input packets 0 unicast packets 0 multicast packets
0 broadcast packets 0 jumbo packets 0 storm suppression packets
0 bytes
Tx
0 output packets 0 multicast packets
0 broadcast packets 0 jumbo packets
0 bytes
0 input error 0 short frame 0 watchdog
0 no buffer 0 runt 0 CRC 0 ecc
0 overrun 0 underrun 0 ignored 0 bad etype drop
0 bad proto drop 0 if down drop 0 input with dribble
0 input discard
0 output error 0 collision 0 deferred
0 late collision 0 lost carrier 0 no carrier
0 babble
0 Rx pause 0 Tx pause
0 interface resets
09-19-2012 09:47 PM
My problem was resolved by specifying speed. So, it looks like by default, switch thinks that it need to operate GLC-T in 10G, which it can't. So doing this manual fix of specifying speed helps fix the issue.
N5K# sh int eth1/21 transceiver calibrations
Ethernet1/21
transceiver is present
type is SFP-1000BASE-T
name is CISCO-METHODE
part number is SP7041_Rev_F
revision is F
serial number is 00000MTC162802H3
nominal bitrate is 1300 MBit/sec
Link length supported for copper is 100 m
cisco id is --
cisco extended id number is 4
SFP calibration is invalid
N5K(config)# int e1/21
DATACORE1(config-if)# speed 1000
DATACORE1(config-if)# shut
DATACORE1(config-if)# no shut
DATACORE1# sh int status
--------------------------------------------------------------------------------
Port Name Status Vlan Duplex Speed Type
--------------------------------------------------------------------------------
Eth1/21 -- connected 1 full 1000 SFP-1000BAS
09-20-2012 07:12 AM
this is already part of our Cisco documentation
03-07-2013 03:20 AM
Hi
I have this same problem as " Ethernet is down Link not connected" in Nexus 7010 Switch.
Since i trying to connect the SFP in one of the Module in N7k. The port is in shutdown mode when i given the command "no shutdown" the LED of the particular port disabled.
GSSO-AGG-N7K-03# sh int eth 7/18
Ethernet7/18 is down (SFP not inserted)
Dedicated Interface
Hardware: 10000 Ethernet, address: 0026.cbcd.6549 (bia 0026.cbcd.6549)
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA
Port mode is trunk
auto-duplex, auto-speed
Beacon is turned off
Auto-Negotiation is turned off
Input flow-control is off, output flow-control is off
Switchport monitor is off
EtherType is 0x8100
Last link flapped never
Last clearing of "show interface" counters never
0 interface resets
30 seconds input rate 0 bits/sec, 0 packets/sec
30 seconds output rate 0 bits/sec, 0 packets/sec
Load-Interval #2: 5 minute (300 seconds)
input rate 0 bps, 0 pps; output rate 0 bps, 0 pps
RX
0 unicast packets 0 multicast packets 0 broadcast packets
0 input packets 0 bytes
0 jumbo packets 0 storm suppression packets
0 runts 0 giants 0 CRC 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
0 unicast packets 0 multicast packets 0 broadcast packets
0 output packets 0 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
GSSO-AGG-N7K-03#
Ports Module-Type Model Status
----- ----------------------------------- ------------------ ----------
32 10 Gbps Ethernet Module N7K-M132XP-12 ok
48 10/100/1000 Mbps Ethernet Module N7K-M148GT-11 ok
0 Supervisor module-1X N7K-SUP1 active *
0 Supervisor module-1X N7K-SUP1 ha-standby
32 10 Gbps Ethernet Module N7K-M132XP-12 ok
NXOS is :
kickstart: version 5.2(5)
system: version 5.2(5)
In the below link i didnt find the compaitblity of module M132XP.
Any idea ?
03-09-2013 07:08 PM
Hi Arumuga,
Did you try to set the speed?
We had issues with the GLC-T SFPs in Nexus-5548 and had to specify "speed 1000" to make it work.
Thanks,
Martin
03-09-2013 07:19 PM
GSSO-AGG-N7K-03# sh int eth 7/18
Ethernet7/18 is down (SFP not inserted)
Maybe this is the reason?
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide