HWIC-1GE-SFP up but no traffic being sent

Unanswered Question
Oct 18th, 2009

Hi there

I am using HWIC-1GE-SFP on 2811 ISR. the Gig port seems up but cannot ping the other end and does not send any traffic.

any help is appreciated.

I have this problem too.
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Giuseppe Larosa Sun, 10/18/2009 - 23:01

Hello Mohammed,

please post

sh run int gix/y

sh int gix/y

sh ver | inc image

is the module recognized by your router?

what is connected on the other side of the fiber link?

check the type of SFP used in both ends and the type of fiber

Hope to help


mohammednw Sun, 10/18/2009 - 23:33


the module is recognised. it is up when i see in the sh ip int bri.

other side is the fiber to copper media converter.

GLC-T copper SFP module is connected to the HWIC.

sh run

interface GigabitEthernet0/3/0

ip address XX.XX.XX.XX

no negotiation auto


sh int

GigabitEthernet0/3/0 is up, line protocol is up

Hardware is PM-3387, address is 0025.45d2.dc64 (bia 0025.45d2.dc64)

Internet address is XX.XX.XX.XX/30

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 1000Mb/s, link type is force-up, media type is T

output flow-control is XON, input flow-control is XON

ARP type: ARPA, ARP Timeout 04:00:00

Last input 22:04:16, output 00:00:02, output hang never

Last clearing of "show interface" counters never

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

0 packets input, 0 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 0 multicast, 0 pause input

0 input packets with dribble condition detected

9994 packets output, 1021726 bytes, 0 underruns

0 output errors, 0 collisions, 6 interface resets

0 unknown protocol drops

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 pause output

0 output buffer failures, 0 output buffers swapped out

sh ver | inc image



Giuseppe Larosa Mon, 10/19/2009 - 02:25

Hello Mohammed,

keepalive is set


>>Last input 22:04:16, output 00:00:02, output hang never

and the interface is up/up

This is strange.

IOS version is new.

I will try to look at GLC-T support

what if you shut and then no shut the interface.

Hope to help


mohammednw Mon, 10/19/2009 - 02:59

thanks for your reply...

i tred to do that it does not work. i did change the GLC-T SFP but no luck. and yes the HWIC 1GE-SFP does support GLC-T. i did verify this with the cisco document.

Leo Laohoo Mon, 10/19/2009 - 13:18

There's output traffic but no input traffic. You sure you don't have an ACL on either side of the /30 subnet?

mohammednw Mon, 10/19/2009 - 21:08


the /30 link is t the ISP. there is n access lists.

Also the cable is connected to the media converter. I do not see any link on the media converter. however if I connect any other device on the Meda converter, its working perfectly OK.

is there any special config required on the Media converter except the normal interface configuraton?? does HWIC-1GE-SFP with GLC-T work?

Leo Laohoo Mon, 10/19/2009 - 21:31

Media converter? Why don't you just get a fibre optic SFP instead of the GLC-T?

Leo Laohoo Tue, 10/20/2009 - 13:14

Maybe it's because with the GLC-T, it won't negotiate duplex and speed. If you move the copper connection to the media converter from the GLC-T to any one of the RJ-45 of your routers (including the config), will you be able to ping across the /30 subnet?


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