08-22-2007 10:30 AM - edited 03-05-2019 06:02 PM
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.
08-22-2007 11:02 AM
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.
08-22-2007 11:05 AM
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
08-22-2007 11:19 AM
When you do show interface g0/1, is it showing 100/HALF, check both sides of the link.
Also, if you use Auto/Auto as the speed duplex config, you'll need to use it on both sides of the link, or else it will auto-negotiate to A-100 A-half when the link is connected.
08-22-2007 11:22 AM
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
08-22-2007 12:10 PM
Mark,
Can you send the output of a show CDP nei detail for BOTH side of the link, as well as a show interface status from both sides of the link?
Thanks
08-22-2007 12:24 PM
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
---
08-22-2007 12:25 PM
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
08-22-2007 12:35 PM
The 2924 side shows Half Duplex, the 3560 correctly shows Full duplex. Is the fa interface set to Auto-speed Auto-duplex on the 2924? If it is, try hard coding it to 100 full.
If the problem persists I'd recommend changing the 3560 SFP and then calling TAC if it continues.
08-22-2007 12:53 PM
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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