GLC-FE-100FX SFP causing Half Duplex

Unanswered Question
Aug 22nd, 2007

We have installed a GLC-FE-100FX SFP in an 8 port 3560. It uses a Gigabit slot in the 3560. The interface G0/1 seems to run at Half Duplex with this SFP installed. Does anybody know why it would run at Half Duplex? I have tried hard-coding the other end but still the same result. There is no option to hard code the G0/1 interface for speed or duplex. Thanks.

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I've not used a 3560-8PC, but on a 3560-24PS if you issue a SHOW INT CAPABILITIES MODULE 1, it shows both Gigabit SFP ports as Speed: 1000

Duplex: full


This means that you can only use a Gigabit SFP.


Try the show command I described and see if the port has a 100FX/Full capability.


If not, you'll need to use the correct SFP device.

mark.blanchfield Wed, 08/22/2007 - 11:05

Thanks for your response. The interface is G0/1 but it has 2 SFP slots that can be used. Here is the output for that command:


GigabitEthernet0/1

Model: WS-C3560-8PC

Type: 100BaseFX-FE SFP

Speed: 100

Duplex: half,full

Trunk encap. type: 802.1Q,ISL

Trunk mode: on,off,desirable,nonegotiate

Channel: yes

Broadcast suppression: percentage(0-100)

Flowcontrol: rx-(off,on,desired),tx-(none)

Fast Start: yes

QoS scheduling: rx-(not configurable on per port basis),tx-(4q2t)

CoS rewrite: yes

ToS rewrite: yes

UDLD: yes

Inline power: no

SPAN: source/destination

PortSecure: yes

Dot1x: yes

Multiple Media Types: rj45, sfp, auto-select


mark.blanchfield Wed, 08/22/2007 - 11:22

It is only showing Half Duplex on the 3560 end. There is no option to set speed/duplex on this interface. The Auto option listed below is for Auto QOS. Thanks

-

Switch(config)#int g0/1

Switch(config-if)#?

Interface configuration commands:

arp Set arp type (arpa, probe, snap) or timeout

auto Configure Automation

bandwidth Set bandwidth informational parameter

bgp-policy Apply policy propogated by bgp community string

carrier-delay Specify delay for interface transitions

cdp CDP interface subcommands

channel-group Etherchannel/port bundling configuration

channel-protocol Select the channel protocol (LACP, PAgP)

dampening Enable event dampening

default Set a command to its defaults

delay Specify interface throughput delay

description Interface specific description

eou EAPoUDP Interface Configuration Commands

ethernet Ethernet interface parameters

exit Exit from interface configuration mode

flowcontrol Configure flow operation.

help Description of the interactive help system

hold-queue Set hold queue depth

ip Interface Internet Protocol config commands

keepalive Enable keepalive

l2protocol-tunnel Tunnel Layer2 protocols

lacp LACP interface subcommands

link Configure Link

load-interval Specify interval for load calculation for an

interface

logging Configure logging for interface

mac MAC interface commands

macro Command macro

max-reserved-bandwidth Maximum Reservable Bandwidth on an Interface

media-type Configure media type

mls mls interface commands

mvr MVR per port configuration

no Negate a command or set its defaults

pagp PAgP interface subcommands

priority-queue Priority Queue

queue-set Choose a queue set for this queue

rmon Configure Remote Monitoring on an interface

service-policy Configure QoS Service Policy

shutdown Shutdown the selected interface

snmp Modify SNMP interface parameters

source Get config from another source

spanning-tree Spanning Tree Subsystem

srr-queue Configure shaped round-robin transmit queues

storm-control storm configuration

switchport Set switching mode characteristics

timeout Define timeout values for this interface

transmit-interface Assign a transmit interface to a receive-only

interface

tx-ring-limit Configure PA level transmit ring limit

udld Configure UDLD enabled or disabled and ignore global

UDLD setting




mark.blanchfield Wed, 08/22/2007 - 12:24

3560 end:

--

CaptHook_SW#sh cdp nei detail

-------------------------

Device ID: SBR_Marketing_SW1

Entry address(es):

IP address: 172.16.20.5

Platform: cisco WS-C2924C-XL, Capabilities: Trans-Bridge Switch

Interface: GigabitEthernet0/1, Port ID (outgoing port): FastEthernet0/24

Holdtime : 127 sec


Version :

Cisco Internetwork Operating System Software

IOS (tm) C2900XL Software (C2900XL-C3H2S-M), Version 12.0(5)WC7, RELEASE SOFTWAR

E (fc1)

Copyright (c) 1986-2003 by cisco Systems, Inc.

Compiled Wed 05-Mar-03 10:26 by antonino


advertisement version: 2

Protocol Hello: OUI=0x00000C, Protocol ID=0x0112; payload len=27, value=0000000

0FFFFFFFF010121FF0000000000000003E34CA200FF0001

VTP Management Domain: ''

Native VLAN: 1

Duplex: full (Mismatch)

Management address(es):

--------

GigabitEthernet0/1 is up, line protocol is up (connected)

Hardware is Gigabit Ethernet, address is 001c.b0d9.f401 (bia 001c.b0d9.f401)

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

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

Encapsulation ARPA, loopback not set

Keepalive not set

Half-duplex, 100Mb/s, link type is auto, media type is 100BaseFX-FE SFP

input flow-control is off, output flow-control is unsupported

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

Last input 00:00:00, output 00:00:19, 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 31000 bits/sec, 32 packets/sec

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

998023 packets input, 113431975 bytes, 0 no buffer

Received 966824 broadcasts (0 multicasts)

0 runts, 0 giants, 0 throttles

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

0 watchdog, 204905 multicast, 0 pause input

0 input packets with dribble condition detected

30577 packets output, 6282658 bytes, 0 underruns

0 output errors, 17 collisions, 1 interface resets

0 babbles, 17 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 PAUSE output

0 output buffer failures, 0 output buffers swapped out

---


mark.blanchfield Wed, 08/22/2007 - 12:25

2924 end


2924 end


Device ID: CaptHook_SW

Entry address(es):

IP address: 172.16.20.60

Platform: cisco WS-C3560-8PC, Capabilities: Switch IGMP

Interface: FastEthernet0/24, Port ID (outgoing port): GigabitEthernet0/1

Holdtime : 156 sec


Version :

Cisco IOS Software, C3560 Software (C3560-IPBASE-M), Version 12.2(35)SE, RELEASE

SOFTWARE (fc2)

Copyright (c) 1986-2006 by Cisco Systems, Inc.

Compiled Sun 03-Dec-06 13:34 by yenanh


advertisement version: 2

Protocol Hello: OUI=0x00000C, Protocol ID=0x0112; payload len=27, value=0000000

0FFFFFFFF010221FF000000000000001CB0D9F400FF0000

VTP Management Domain: 'manufacturing'

Native VLAN: 1

Duplex: half (Mismatch)

----------

SBR_Marketing_SW1>sh int f0/24

FastEthernet0/24 is up, line protocol is up

Hardware is Fast Ethernet, address is 0003.e34c.a218 (bia 0003.e34c.a218)

Description: Link to Captain Hook MG

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

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

Encapsulation ARPA, loopback not set

Keepalive not set

Full-duplex, 100Mb/s, 100BaseFX

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

Last input 00:00:01, output 00:00:00, output hang never

Last clearing of "show interface" counters 08:00:21

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops

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

5 minute output rate 30000 bits/sec, 32 packets/sec

28072 packets input, 5941397 bytes

Received 2729 broadcasts, 0 runts, 0 giants, 0 throttles

15 input errors, 15 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 2371 multicast

0 input packets with dribble condition detected

956078 packets output, 108776302 bytes, 0 underruns

0 output errors, 0 collisions, 2 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out


mark.blanchfield Wed, 08/22/2007 - 12:53

It is actually the other way around. I tried hard coding the 2924 side but that did to cure the duplex mismatch. Cannot set the Gigabit interface on the 3560. I may have to call TAC. Thanks.

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