Hi all,
Running up against an odd issue where we have a 3550 with an LX GBIC trying to
talk to a copper port on an ME3600 with a media converter in the middle. The
ME3600 side always shows as up; we disabled fault passthrough on the MC. The
LX GBIC on the 3550 side shows down/down with negotiation enabled, so with
negotiation disabled, it shows up/up, but at half duplex(?!). Anyone seen this
before? I didn't think an LX GBIC at half duplex was possible, even with
negotiation disabled as there is still no way to force the duplex in that
state. Bad GBIC? Media converter borked? Gremlins?
I'd be grateful for any insight gleaned from prior experiences..
Thanks in advance.
For completeness:
Model number: WS-C3550-24-SMI
System image file is "flash:c3550-ipservicesk9-mz.122-35.SE5.bin"
TOYF-1.10-1.A920#show int g0/1
GigabitEthernet0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0014.6aa4.0c00 (bia 0014.6aa4.0c00)
Description: Facing gi0-24.pe01.171EastLibertySt01.YYZ
Internet address is 1.1.1.1/30
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Half-duplex, 1000Mb/s, link type is force-up, media type is 1000BaseLX
input flow-control is off, output flow-control is on
ARP type: ARPA, ARP Timeout 04:00:00
Last input 23:14:46, output 00:00:02, output hang never
Last clearing of "show interface" counters 06:02:06
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, 144492 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
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
326 packets output, 122306 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
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
TOYF-1.10-1.A920#sh run int g0/1
Building configuration...
Current configuration : 167 bytes
!
interface GigabitEthernet0/1
no switchport
ip address 1.1.1.1 255.255.255.252
speed nonegotiate
end
TOYF-1.10-1.A920#show mac address-table int g0/1
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
TOYF-1.10-1.A920#
.........
TOYF-1.10-1.A920#sh int g0/1
GigabitEthernet0/1 is down, line protocol is down (notconnect)
Hardware is Gigabit Ethernet, address is 0014.6aa4.0c00 (bia 0014.6aa4.0c00)
Description: Facing gi0-24.pe01.171EastLibertySt01.YYZ
Internet address is 1.1.1.1/30
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Auto-duplex, Auto-speed, link type is auto, media type is 1000BaseLX
input flow-control is off, output flow-control is on
ARP type: ARPA, ARP Timeout 04:00:00
Last input 23:18:01, output 00:00:18, output hang never
Last clearing of "show interface" counters 00:00:32
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 IP multicasts)
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
4 packets output, 1210 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
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
TOYF-1.10-1.A920#sh run int g0/1
Building configuration...
Current configuration : 148 bytes
!
interface GigabitEthernet0/1
description Facing gi0-24.pe01.171EastLibertySt01.YYZ
no switchport
ip address 1.1.1.1 255.255.255.252
end
TOYF-1.10-1.A920#
