Cisco Switching/Routing :: 3750G-12S-S / Cannot Set Int G1/0/1 Into Speed 100 / Duplex Full
Aug 12, 2011
3750G-12S-S.Problem description:I had a WS-3750G-12S-S in production with a defective fan tray and needed to change it.I faced to trouble with inter g1/0/1 on the new switch( it worked fine on the old).
Here the config for old switch:
interfacigabitEthernet1/0/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 111-113,278,790
switchpmode trunk
speed 100
[code]....
even if I configure speed nonegotiate that does not work.
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Jun 4, 2013
I have C3750X with C3KX-NM-10G, and have-T SFP in slot 3 ( means it is not in SFP+ slot ).I need to set speed&duplex hard to 100/Full, but if I do the link goes down. I have the same settings on the other side, only IOS version is different.I tried other speeds - 10 and 1000, but no one works with Full. When I change duplex to Auto it works fine.The reason why I am doing this on C3KX-NM-10G is because I need to use NetFlow and cannot use the chassis' copper port. At the moment the ports are connected through a copper patch cord, but in full production there will be a radio link in between that requires 100M/Full to be set hard.I am trying to search for any document that would describe this limitation, but cannot find any. Also port capabilities do not indicate duplex could not be set to full:
show interfaces g1/1/3 capabilities
GigabitEthernet1/1/3
Model: WS-C3750X-48P
Type: 10/100/1000BaseTX SFP
Speed: 10,100,1000,10000,auto
Duplex: half,full,auto
Trunk encap. type: 802.1Q,ISL
[code]....
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Nov 2, 2011
I would like to know why i can't configure to 100 full duplex one port from target follow: WS-X6724-SFP
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Sep 1, 2007
Can we force the Gigabit Ethernet port to be 1000 full duplex in Cisco Catalyst Express 500 series?
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Mar 31, 2013
I am trying to hard code the speed and duplex settings on interfaces gigabit 0/1 - 2 interfaces with out success.
DSW121(config)#interface range g0/1 - 02
DSW121(config-if-range)#speed ?
Nonegotiate Do not negotiate speed
[Code]...
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May 21, 2013
I have NM-16ESW card installed in one of my 3845 router. Below is the sh inventory output
NAME: "16 Port 10BaseT/100BaseTX EtherSwitch", DESCR: "16 Port 10BaseT/100BaseTX EtherSwitch"
PID: NM-16ESW , VID: V01 , SN: FOC11482484
NAME: "Gigabit(1000BaseT) module for EtherSwitch NM", DESCR: "Gigabit(1000BaseT) module for EtherSwitch NM"
PID: GE-DCARD-ESW , VID: V01 , SN: FOC11454FW6
Is the Gig port available here can be used for uplink?I found following comment at
[URL]...
"GE-DCARD-ESW: This optional 1000BaseT Gigabit Ethernet port for NM-16ESW and NMD-36-ESW can be used for a gigabit connection for a file server or for intra-chassis stacking of the Cisco EtherSwitch module. Stacking is supported in Cisco IOS release 12.2(11)T and beyond"
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Jul 28, 2011
I have the following configurations for switch to switch connectivety. sh int sh config int
2960 will not take full duplex setting.
Core switch
WS-C4506 cat4000-i9s-mz.122-25.EWA10.bin
FastEthernet5/8 is up, line protocol is up (connected)
[Cdoe]....
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Nov 6, 2012
So I recently got a new computer today and it won't let me use my 100mbps of internet bandwidth. (Asus Sabertooth Z77 with an Intel 82579v gigabit lan controller) I noticed that at the LAN connection properties>Properties>Configure>Link Speed tab the 'Speed and Duplex' option was on Auto Negotiation and it was only accepting (or supporting) the 10mbps Full Duplex. When I switched it to 100mbps Full Duplex it would mark my connection icon with a red cross and when I clicked diagnose it said "Please connect your ethernet cable or your cable might be broken". So I tested my internet speed with that same cable on a different computer (laptop) and it worked with 40Mbps, so I don't think the cable is broken. Also I just recently downloaded some drivers but one was specifically for the Intel LAN controller but I'm a total noob for all of this computer stuff I don't know if it messed it up or something. Is it the motherboard that's not working correctly?
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Sep 28, 2011
Howto set ports from WS-C2940-8TF-S to full- and half-duplex 100Mbit?
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May 19, 2011
If I change the network adapter settings to 100 Full Duplex, is there any changes that will take effect? even if we don't have Cisco switches in our network.
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Jan 15, 2012
Has any come across show ver memory details on 3750G-48PS as below, One of our Catalyst 3750G running software 12.2(44)SE2 shows unexpected DRAM as below:
cisco WS-C3750G-48PS (PowerPC405) processor (revision F0) with 0K/12280K bytes of memory. This would equate to around 11MB memory which does not seem right... Is it a known IOS bug?
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May 19, 2013
Is there a way to configure the GIG 0 interface on the 1552E Access Points to 10 Meg Full Duplex? Currently they will only work in Auto/Auto
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Feb 26, 2011
I have 100 mbps fiber connection. I bought 320N today I bought 320N and here is the problem:
We have a switch in the building. I am getting connection via CAT5. So I choosed "Use as WAN Port" from Ethernet settings. There is not much you can do here. I just used PPPoE and connected internet without any problem. The problem is I am only getting 32mbps. When I connect CAT5 cable directly to my computer I am getting 92mbps.
Maybe WAG320N is not establishing a full duplex connection.
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Oct 22, 2012
I ran into a strange problem. When I want to change the ethernet0 interface of a Cisco 828 sdsl router, but there is no command to do that in the interface configuration mode (speed 100 and duplex full). A show interface gives 10MB half duplex and I want to change this.
This is the running config (a little censored):
!
!
interface Ethernet0
[Code].....
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Jan 27, 2013
we have connected gig interface Ethernet on Cisco 2900 series router to mpls link connected to our corporate network ,the issue here is our router interface speed and duplex settings are set to auto negotiation.The interface is negotiating speed and duplex at 10 and half where the provider side interface is hard coded to 100 and full duplex.when we tried to hard code the settings on our router to match the provider the interface never come up.
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May 14, 2012
I cannot seem to correct a duplex mismatch issue.I have a Cisco 2950 switch connected to a Cisco 2621 router. I am running a per-interface Vlan. I have two fastethernet ports and one NM-1E card installed on the router. One fastethernet port is connected to my gateway router, the second fastethernet port is connected to my switch for one Vlan. The NM-1E Ethernet card is being used for the second Vlan which consists of nine IP cameras. Though the cameras on the Vlan are working fine.Now, the NM-1E card is set to half-duplex. I know that I should be using a fastethernet module like a 1FE 2W or a 2FE 2W card, (which I have,) but the router does not recogonize either one of these cards when they are installed, and yes, they have been confirmed as good cards.
Using Router-on-a-Stick configuration is out due to the bandwidth contention besides the fact that the router I am using it on will not handle this due to the flash being an older version.I have forced the switchport to half duplex, setting the speed to 10. I was getting fewer error messages at first, but they soon increased back to the frequency that they began with.I have set the switchport to duplex auto, but this failed to resolve the issue.Obviously, I cannot force the switchport into duplex full since the NM-1E interface is set to half duplex. Can the NM-1E card be configured to full duplex? I can't seem to find any documentation showing where it can be forced to full duplex mode.Could nine IP cameras just be too much for both the router and switch to handle?
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Jul 8, 2012
I have a 4503 switch (in L2 mode) running 12.1 hooked into a C2950 running 12.1, using regular 4 pair Cat5e cables to connect between them. The 4503 has Gigabit port 2/1 trunking to the 2950's Fa port 0/13.
When I set the duplex mode to DUPLEX FULL and SPEED to SPEED 100 on both switches (for their trunk ports) the link fails, and my 4503 loses connectivity (since it gets it from the 2950).
Here is my config from the switches (per description):
The 4503:
interface GigabitEthernet2/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,2,100-140
[Code].....
Note, this is the only mode that works (which seems to work fine, but I get TERRIBLE throughput for anything that goes over the 2950.
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Jan 2, 2012
I am doing an small project, I have to connect 4 cisco switches SF 302-08 (1 GBIC each one) to a core switch SGE 2000 (4 GBICs). Because of cable length I have go connect all 5 switches with fiber. The fiber termination is multimode LC duplex. My confusion is on the mini GBICs. There is compatibilities issues i been reading. [code]
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May 25, 2012
1 week ago, I got a call from a client that reported a network outage, the client told me that, 3 switch has crashed he try to console but it just hang. I ask him, did you change something? he said he didn't change anything, he just pluged a nortelswitch to the cisco switch number 9, but that switch doesn't crash like the others (3,4,8). I check the uptime, and yes the switch never been powered off..
the topology look like this
____ 6500 ____
/ / |
1 2 3 4 5 ...... 9
the vlan is end to end vlan, so vlan span between all those switches. transparant. this is collapsed topology, core and distribution is the 6500 itself all of the 1-9 access switch are in the same rack, with no loopguard, and bpdu guard configured. and connected to the core using etherchannel. the problem is there is no log available to start the troubleshooting/investigation.
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May 3, 2012
what is causing " Gigabit port is restricted to full duplex" while trying to hard code speed/duplex on a 4507 switch port?
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May 3, 2012
I have a video conferencing device and I struggled a lot with a bunch of different routers. I was giving up but then I plugged in a friend's old Linksys/Cisco Adsl gateway and all the problems disappeared (kudos to Cisco). The problem is that the gateway is not ADSL2+. I have since borrowed a Linksys/Cisco ADSL2+ router, however, there isn't a possibility to enter port speeds/duplex manually (required to prevent packet loss in video conferencing, I really want to have that option for the peace of mind). I have been looking around on the internet but I can't seem to find this ability any routers' specs. What I need is as follows:
- Has to be Cisco or Linksys router
- Has to be ADSL2+ (Annex A)
- Doesn't have to be wireless, even single port is OK
- Preferably has DMZ
- Ability to hard code lan port speed/duplex (i.e. no autosense)
- No other functions needed so hopefully a cheap option
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Nov 15, 2012
What should the duplex mode to be set on a routed port gi0/21 that are running HSRP ? I try setting the gi0/21 to full, but it caused the port to be down. The only way for the port to be up is setting it to half duplex.
Cisco 3750 Switch
==============
interface GigabitEthernet0/21
no switchport
ip address 10.200.104.34 255.255.255.248
[Code].....
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Sep 24, 2012
We recently upgraded the switch to which an old security device was connected. It worked fine on the old switch's FastEthernet port, which was configured for speed 10 and duplex half, as that is what the device required. The new switch is a 3560X with all Gigabit ports, but the security device's port, also configured with speed 10 and duplex half, does not connect properly.As a temporary test, we daisychained another switch that has FastEthernet ports, and the security device works again.Is there anything else that needs to be added to the configuration, when using Gigabit ports at 10/half?
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Jan 21, 2010
I have the following issue; I am getting a duplex mismatch between a Cisco 2960 TT-L Switch running IOS 12.2(35) LAN Base Image (Gig0/1) and a Cisco 6506 Switch running IOS 12.2(33)SXH Adv IP Services (Gig2/19).
I have tried several combinations of the duplex/speed settings on both sides but the only that works is setting duplex/speed AUTO on the Cisco 2960 which ends up autonegotiating to HALF duplex and 100Mbps.
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Jun 11, 2012
We are facing to an annoying issue. We have a 6509 running in Catos 8.3(4) with WS-X6548-GE-TX, WS-X6348-RJ-45 and WS-X6148-RJ-45. When we configure the mode in auto negotiation, it comes up in half duplex. We need to configure the speed mode at 100Mbit/Full to make it work. But if the chassis or port restarts (not the server), the link becomes half duplex. This happens only on module in Gigabyte like WS-X6548-GE-TX.
Cable have been replaced but does not work. It is not happened on another chassis running on IOS 12.2(18)SXF17b with WS-X6548-GE-TX.
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May 24, 2012
I have a broadband connection and recently I bought a new D-Link wireless router for accessing internet on my Android phone via Wi-Fi. Router model no. is N 150 DIR-524.After configuring it was working fine for a week or so and then one fine day internet stopped working on my PC and router LED for internet was not glowing as well. So I called my ISP and they changed my ethernet card settings (nVidia).They changed the 'Speed/duplex settings' from 'Auto Negotiation' to '10 Mb Half Duplex' and then the internet started working. During this they had disconnected my router. Once they were gone, I reset the router and connected it back. Since then it ain't working Internet works fine when the cable is plugged directly in the ethernet card but doesn't work when plugged via router. Router does everything right from opening the '192.168.0.1' page to saving the settings. But there's no internet access.
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Mar 21, 2012
I got Two Distribution Switches of Cisco 3750G. Each Distribution have two 3750G switches stacked. I also have one Cisco 3750V2 Access Switch connected to both Distribution. When I am checking for redundancy, I can only get redundancy test pass for one link not atall for other. If I have a link up with Distribution 1 only then its fine; but disappointment with Distribution 2 link. I can see that the switch priorities of Dist 2 is not correct ie. Master's priority is 10 and Member's is 15.
My question is that due to misconfigured priorities on Distribution 2 stack switches I am failing with redundancy if ONLY Dist 2 is up and Dist 1 is down.
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Oct 8, 2012
Is a 3750 sw capable of handling full routing tables and what can you recommend in a small mutihomed BGP router or switch capable of handling full routing tables?
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Mar 4, 2012
I've one Cisco 3750G-12S with ip routing enable, the swtich is with IP Service firmware, with PRR support.Currently set my default static route 0.0.0.0 0.0.0.0 10.1.18.71 to my Firewall A Currently all of the VLAN for will be routed to 10.1.18.71
I've created a new VLAN 2 for my 10.1.2.0/24 network with the VLAN interface 2 ip address 10.1.2.10, my intention is to route 10.1.2.0/24 traffic to my 10.1.2.1 by creating the access list and route-map.
I've configure my test pc with a static ip and my gateway pointing to 10.1.2.10 (VLAN 2 gateway) , i'm not able to route to 10.1.2.1.
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Oct 15, 2011
Okay so I just upgraded internet speed to 6Mbps My laptop is getting around 5.8Mbps which is fine but my PC is only getting 1.5 Mbps?
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Nov 8, 2012
I have a couple of 3750G-24T-E switches running IOS 12.2 I would like to upgrade to IOS 15.x. Is this possible? Where do I find some information on the required licenses and costs? I must admit that the cisco search function did come up with a few pages but i was not able to extract the required information. I have not used the new software activation features yet.
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Jun 7, 2012
I've got a requirement to do Inter-VRF routing (need MP-BGP) using a private AS Number on a stack of 7 x 3750G's, my question ultimately is the performance overhead of doing such a change.
The stack will have no more than 300-400 routes even with the duplicates invoked from doing VRF leaking so I can't see much of an issue myself, we already have 2 VRF's and OSPF running in each VRF just don't have MP-BGP to do the VRF leaking.
Ultimately there will be about 4-5 VRF's (I know there's a Software limit of 26 VRF's on a 3750G).
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Nov 22, 2011
What is the maximum operating range (distance) allowed to maintain the full transmission speed?
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