Lock speed/duplex on Gigabit-interface in Catalyst 3750?

Hi
How do I lock speed to 1000 and Duplex to full on a switch-interface in a Catalyst 3750? Default is "Auto-duplex, Auto-speed" and the only relevant command I can find is "speed nonegotiate" but even with this command on an interface show interface saids Auto, Auto.
Thanks in advance
Regards
Jimmy Larsson
CCNA, CCNP, yada yada yada. ;)

As I said it depends on what type of interface you have. You have a 10/100/1000 Mbps interface.
Here are the options for a 1000Mbps only interface
Switch(config)#int gig 1/0/1
Switch(config-if)#speed ?
nonegotiate Do not negotiate speed
Here are the options for a 10/1000/1000Mbps interface
Switch(config-if)#int gig 2/0/1
Switch(config-if)#speed ?
10 Force 10 Mbps operation
100 Force 100 Mbps operation
1000 Force 1000 Mbps operation
auto Enable AUTO speed configuration

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Speed configuration of SFP port on catalyst 3750

Can I configure the speed (10/100/1000) in a SFP port ?

Hi Smart,
May be this link will answer what you are looking for
http://www.cisco.com/en/US/products/hw/modules/ps4999/products_tech_note09186a00807a30d6.shtml#config1
Regards,
Ankur

AIR-AP3502i gigabit interface issue

Support Community,
          I currently have an issue with my AIR-AP3502i gigabit interface. I connect my AIR-AP3502i to my 3560G POE switch and the port will not negotiate to1GB. I have tried auto negotiate and hard coded settings but when I try those settings the switch and AP interfaces go into an up down state. Has anyone seen this issue before?

Never mind, I was mistaken, the command was there. Thanks for the new command.
Interface Speed Local pair Pair length        Remote pair Pair status
Gi0/7     100M Pair A     0    +/- 4 meters Pair A      Normal
                Pair B     132 +/- 4 meters Pair B      Fail
                Pair C     110 +/- 4 meters Pair C      Fail
                Pair D     1    +/- 4 meters Pair D      Normal
Interface Speed Local pair Pair length        Remote pair Pair status
Gi0/7     100M Pair A     0    +/- 4 meters Pair A      Normal
                Pair B     132 +/- 4 meters Pair B      Fail
                Pair C     110 +/- 4 meters Pair C      Fail
                Pair D     1    +/- 4 meters Pair D      Normal

Cannot Establish Gigabit Link Between Catalyst Switches and GSR Router

The GSR Gigabit interface is configured for no negotiation auto and the line protocol goes up when connected to the Catalyst switch.
The Catalyst switch port remains unconnected even when it is physically attached to the GSR router.

The flow control settings must match on both sides for the link to come up. It is highly recommended that you configure auto-negotiation to on for both devices. (Auto-negotiation is enabled by default on all Catalyst switches.) Otherwise, if you have a layer 1 problem, the link remains up and a unidirectional link will result.
The initial software releases that support Gigabit Ethernet on the GSR router do not support gigabit auto-negotiation.
The following command configures gigabit auto-negotiation on the Catalyst 6000/6500:
set port negotiation module/port disable|enable

IPS Speed & Duplex settings

I have a 4240 inline between an ASA and a Switch, and am experiencing errors on the switch indicating receive discards.
The devices are directly connected like this, ASA --- IPS --- SWITCH. The ASA and Switch have the speed/duplex fixed to 100/Full, but the IPS is auto negotiate. Both ports have negotiated to 100/Half, which I believe is causing the issue (open to alternative suggestions) however if I change to fixed parameters I loose connectivity. How should these connections be configured to remove the errors?

Network Interfaces do not support fixed configuration of speed and duplex on one device and auto negotiate on the other device.
The device set to auto negotiate will send out negotiation queries to the other device, but because the other device is fixed it will not respond to the queries. The devices with the fixed speed and duplex does Not respond with the fixed speed and duplex, and instead just simply does not respond at all to the auto negotiation queries.
So the device with auto negotiation is not able to determine the settings for the other device, and will set it's own speed and duplex to the default settings for that NIC. On most 10/100 and 10/100/1000 copper interfaces the default will be 100 Half Duplex.
So for auto negotiation to work properly you Must set Both devices to auto negotions.
If you will fix speed and duplex on one device, then you must also fix speed and duplex on the other device.
The other thing to keep in mind is the type of cable connecting the 2 devices.
For 10/100 interfaces you have to be very carefull of the type of cable being used. When connecting the sensor to a switch it must be a standard cable. BUT when connecting the sensor to a Firewall, Router, or PC, then it likely needs to be a CrossOver cable. (The switch has built in the equivalent of crossover directly within its ports, but firewalls, routers, etc... generally do not)
If you are using 10/100/1000 interfaces on both devices, and have both devices set to auto negotiate; then in most cases the type of cable will not matter. When auto negotiate begins they will determine the cable type and one of the 2 will automatically do a sort of internal crossover if needed, and will then auto negotiate to 1000 Full.
HOWEVER, if you fix the speed and duplex then just like with 10/100 interfaces you have to be very carefull that you are using the right type of cable. There will not be any negotiation and so your cable choice must be very specific. In most instances you will need to use a crossover cable when connecting the sensor to a Firewall or Router, but use a standard cable when connecting to a switch.
So be sure to set speed and duplex the same on both devices. Either both devices with fixed speed and duplex, or both devices with auto negotiated speed and duplex.
And be sure you are suing the right type of cable for your particular connections.

Gigabit interface converter

I?m using a Cisco Gigabit Interface converter (GLC-LH-SM) in my router 3845. Is that possible to use commmand "speed" in that interface to connect to a fastethernet port? Does it om?nly work at 1 Gbps?
Best regards
Ant?nio Machado

Hi
AFAIK it works only at 1Gbps speed.
regds

Speed/Duplex are not advertising correctly with configured values

Hi,
I have a gateway which runs on Windows Embedded Standard 7 which has Intel NIC Card.
I have connected this gateway and a switch in a network where switch has configured speed/duplex as 1000Mbps/Full.
When I set the Speed/Duplex on my gateway's NIC to Auto-Negotiate or 1000Mbps/Full, it negotiating/advertising the speed and duplex properly.
But when Speed/Duplex sets to 100Mbps/Full on gateway's NIC, in the Switch it shows that my gateway is advertising the Speed/Duplex as 100Mbps/Half Duplex.
I have checked the registry entries which sets when we configure the Speed/Duplex at adapter properties, registry entries are fine. I am not able to understand how exactly it negotiates Speed/Duplex and why it is advertising with 100Mbps/Half Duplex when
it is configured for 100Mbps/Full.
Thanks,
Challask

Hi Andy,
Thanks for the reply.
I have checked that the configured value on the adapter is 100Mbps/FullDuplex. I am checking these configured values through the registry entry
Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\00NN\*SpeedDuplex. It shows the configured value.
The doubt have here is that i have checked the enum values for this *SpeedDuplex entry, it shows in the following way:
0 - Autonegotiation
1- 10Mbps HalfDuplex
2 - 10Mbps FullDuplex
3 - 100Mbps HalfDuplex
4 - 100Mbps FullDuplex
6 - 1000Mbps
Why don't have here the value 5?
I have checked this registry in other Windows Operating systems, it shows correctly. Only in this Windows Embedded Standard 7 OS it shows this way. Will it create any issue? While performing the Speed/Duplex advertisement/Negotiation will it use these enum
values? If so how can I resolve this issue?
Thanks,
Challask

Speed/Duplex between two different switchs & SFP

Hi everybody,
I'm sorry about my poor english... I'm French (but it is not contagious)
I need your help (or TAC Help ) about speed and duplex problems.
My network :
[C2960G-24TC-L with sfp GLC-FE-100LX on Gig 0/23] <--> (Singlemode Fiber 9/125µ) <--> [Cisco SF200-24 with sfp MFELX1 on Gi1]
Autonegociation everywhere...
My problem :
%CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on GigabitEthernet0/23 (not full duplex), with f02929f97095 gi1 (full duplex).
- I can't force speed/duplex on MFELX1 (actually a-full a-100)
- I can't force speed/duplex on GLC-FE-100LX (actually a-half a-100)
Is there an incompatibility between this equipements ?
Configuration detail :
WS-C2960G-24TC-L   12.2(58)SE2           C2960-LANBASEK9-M
Cisco SF200-24 Firmware Version (Active Image): 1.2.9.44
#sh int gig 0/23 capabilities
GigabitEthernet0/23
Model:                 WS-C2960G-24TC-L
Type:                  100BaseLX-FE SFP
Speed:                 100
Duplex:                half,full
Trunk encap. type:     802.1Q
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-(4q3t) (3t: Two configurable values and one fixed.)
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
#show int gigabitEthernet 0/23 transceiver properties
Diagnostic Monitoring is not implemented.
Name : Gi0/23
Administrative Speed: auto
Administrative Duplex: auto
Administrative Auto-MDIX: on
Administrative Power Inline: N/A
Operational Speed: 100
Operational Duplex: half
Operational Auto-MDIX: on
Media Type: 100BaseLX-FE SFP
Configured Media: auto-select
Active Media: sfp
Thank you so much for yor help !

Thank you Leo,
It doesn't work, but I found an solution !
A strange solution...
I forced the C2960G-24TC-L to work with SFP :
media-type sfp
When I do that, I have the possibility to force the duplex (but not the speed... ok why not... ) :
duplex full
It is not very clean but my link is up and full-100 both sides.
Not very clean because :
C2960 side = force duplex, auto speed
SF200 side = auto duplex, auto speed
No errors... the link is clean.
Anyone known the reason or a better solution ?

Set speed limit to network interface

Hi
I want build a program to set limit speed to my network interface
for example max download speed for wlan connection 10Kb
how must edit network interface for this work
i searched but can't found anything
thanks

Why would you want to do this?
It sounds quite suspicious to me.
Still lost in code, just at a little higher level.
i want save my monthly traffic
That doesn't make much sense. How will limiting the network speed do that?
If you limit the network speed to 20% of what it was then it will just take 5 times longer (more really due to the amount of overhead in data packets) in order to upload or download anything.
If you are on a plan which limits the amount of data via the plans network which can be uploaded and or downloaded during the plans payment time period then perhaps you should monitor the data transceived over the link during that time period.
Then write an app that turns off a NIC and will monitor the NIC so if it is enabled it is turned off again whenever some daily allowance of bandwidth is exceeded. Or perhaps write a service for that. Of course the app or service would need to know the pay
period to monitor, the amount of bandwidth provided for the pay period, constantly store bandwidth used (either sent, received or both) while the NIC is up and be designed to know for each day when to disable the NIC if necessary. And allow the NIC to be re-enabled
or re-enable the NIC when some time occurs following the previous disable of a NIC.
However you don't provide what the requirement would be other than you just want to limit bandwidth via some NIC. Which really means nothing unless multiple PC's are vying for bandwidth and you want on specific PC to be allocated more bandwidth than
any other PC or something.
Group Policy Editor has a setting that can apparently
limit reserveable bandwidth. I don't know if setting that to %95 would only provide applications %5 of the available bandwidth. I've installed GPE on my Win 7 Home Premium PC which it does not come
with and I had to find an installer from an untrusted source in order to do that.
Recently I had a friend using a Verizon WIFI device which provides local WIFI for PC's via Verizons cell service I suppose. Apparently if the PC was left on and nobody was using it then bandwidth was used. I believe in about one 6 hour time period over %15
of the entire pay periods bandwidth allowance was used when his girlfriend let the PC on unattended. So I could see where some type of monitor app would be nice for a situation like that.
When you use few words to describe anything the result is everybody having to guess. And with regard to what you think you want to do it makes the entire thread a guess.
La vida loca

Catalyst 3750 interface explaination

Dear Sir,
I don't understand as follows :-
1.) why on Catalyst3750 interface fastethernet 1/0/1 ?? <--- what's the meaning of 1/0/1 ?
2.) what's the meaning of no mdix auto?
Please explain and advise.
Thank you.

The 3750 has many interesting features, I recommaned you go through before you connect your switches in a production environment.
Basically, you should provision your stack master with the number of switches and their types. You could provision as well the interfaces with their corresponding configurations, even though the other elements are still not connected yet. This way, you ensure, when you add a provisioned element with the right number, it will take exactly the provisioned configuration you've already set on the master,... as well when changing an element with an other, when moving it,... you will have just to provision its number and then connect it to the stack while is not yet powered on.
Second, it is recommanded to set priority to each element, this way you will have a deterministic configuration and you know in advance which one will be reelected as master in any sitution.
If no provision is set on the stack master, when you connect a switch, it has by default the number "1", in this case the newly added switch will take the lowest switch number available (2).
1.) 1/0/1 --> so the second will be 2/0/1.
And to address its ports you tape: 2/0/1, 2/0/2, 2/0/3,2/0/4,...2/0/24,...
How to stacked both of the catalyst 3750? just purchase one stackable cable to link both of them and will it automatically configure the 2nd switch from 1/0/1 to 2/0/1 after we plug in the stackable cable into the 2nd switch.
For large deployment I recommand the switches to be provisioned manually: Before stacking the switches:
1/ power on the switch that will be the stack master, then wait till it will be in "Ready" state by issuing "show switch detail" command.
2/ Provision the stack master with the desired stack configuration (numbers of switches, types of switches and interfaces configurations).
3/ Reload the stack master.
4/ Provision the second switch with its number and type.
5/ Power off the second switch afetr having saved its configuration.
6/ Stack the second switch to the stack master.
7/ power it on. It will take the provisioned configuration on the stack master.
The advantage of this procedure is that switches could not be renumbered while stacked and running.
Repeat steps 4 to 7 for each new element having been provisioned in the stack master.
Do not forget to save after each step.
2.) so i put "no mdix auto" on catalyst 3750, what's the meaning and impact?
no mdix-auto will disable the advanced feature of abstructing the type of cable (staight throu or cross over). You will downgrade to the standard interfaces specifications. In fact, mdix-auto (activated by default) permits to not to have the "overhead" of distinguishing crossover and straight throu cables, the interfaces will adapt automatically to the type of cable.
An other advantage of this function is that it opimises (combined with other functions) error and recovery procedures in layers 1 and 2.
Mohamed BEN HASSINE

Changing Catalyst 3750 Console Speed

Does anyone know if the console speed of a Catalyst 3750 can be changed? The switch does not have a valid IOS image installed and the only prompt accessible is the Switch: recovery console prompt. Before using the xmodem I am hoping there is a way to increase the baud rate to speed things up a bit.

Check out document:
http://www.cisco.com/en/US/products/hw/routers/ps282/products_installation_guide_chapter09186a008007dfca.html
It available witout a login. Look in the section:
"Modifying the Configuration Register in Menu Mode"
Good info to print and keep on hand, cuz when you need it...
HTH.
Jim

Cisco 7609 - optical gigabit interface

Hi all,
I have a strange problem with the optical gigabit interface of a Cisco
switch 7609. This is the problem:
I have two 7609 cisco switch (A and B) cross connect with a optical
fiber.
All port of both switches are configured as followed:
switchport
switchport mode acces
shutdown
no cdp enable
no ip address
end
With the same optical fiber cable i have connect two ports of the switches and I brough up the interface.
I got the following result if i run 'show ip interface brief' on the switches:
SW A - SW B
port 1 - port 1 --> link down protocol down
port 2 - port 1 --> link up protocol up
port 1 - port 2 --> link up protocol up
port 2 - port 2 --> link up protocol up
Why if i connect port 1 on both switches the link don't brought up?
Have anyone some idea for the possible cause of the problem?
Thank you
BR
\Sergio

Try:
http://www.cisco.com/en/US/products/ps6902/products_implementation_design_guide_chapter09186a008062f863.html

How to configure isdn pri on gigabit interface on AS 5850 router

hello All,
i currently have a project at hand which is a voip project using sip protocol. my client wants to send voip traffic to my router using STM interface with SIP protocol. But the challenge is how do i convert the sip protocol to ISDN PRI on another STM gigabit interface before sending it to my PSTN switch for onward termination to the customer. currently i use serial interface to communicate with my PSTN using E1 for other existing clients in other to terminate calls to customers. please see sample configuration below:
interface Serial10/1:15
no ip address
encapsulation hdlc
no snmp trap link-status
trunk-group JKN
isdn switch-type primary-net5
isdn incoming-voice modem 64
isdn map address .* plan unknown type unknown
isdn send-alerting
no cdp enable
thank you.
Adekunle

hello n-kirillov,
Yes i mean STM as Synchronous Transport Module for Optical Network. currently, the medium of transport for communication between my router and the PSTN switch is the serial interface whose configuration i have shown above. also currently E1 pri cables are connected to this serial interface and E1s are provision for this serial interfaces directly from the switch for communication with the PSTN switch.
the question now is that my switching team now wants be to communicate with their switch using fibre from STM interface on my router without using PRI cables. is this achievable? if yes what is the configuration like?

Trunking between Huawei S3900 and Cisco catalyst 3750

One of my edge Huawei S3700 switches is dead, I am going to replace it with a Cisco switch Catalyst 3750 series PoE-48 via a trunk link with GE fiber port on both ends, please see the diagram below.
trunk trunk
Core switchrouter<----------S3700<--------------->Cisco Catlyst 3750
I haven’t touch Cisco switch for many years, I would like to ask the following questions:
1.)      Do I need to take any precaution before connecting this Cisco switch into my Huawei network? Only one link between S3700 and C3750, so I don't need worry anout STP? Do I need to worry about Default vlan regarding trunking port?
2.)      I need to use different trucking protocol e.g. 802.1Q etc to interconnect these two switches (S3700-28TP-SI-AC and Catalyst 3750), please see the following configuration:
For C3750:
switchport trunk encapsulation dot1q
switchport trunk native vlan (What you want)
switchport trunk allowed vlan (VLANs required)
switchport mode trunk
spanning-tree portfast trunk
For S3700:
port link-type trunk
port trunk permit vlan all
Do you think the configurations above are right?
Do I need to manually enter Duplex and speed options ?
3.)If the configurations are not right, then what are the commands for trucking port/link should I use on the Cisco switch (it uses IOS software) and Huawei switch? Procedures of the commands would be really helpful !
Any information and help would be much appreciated.
Thanks
Regards

Hello
3750 - basic config
================
See as you are using this switch as an host switch you need to make sure ip routing isn't enabled ( it isn't by default)
Also it looks like the s3700 Huawei switch is permitting all vlans and I assuming the default native vlan is 1 ( as is cisco) so no need to specify the native either.
If you are requiring the access ports on this new cisco 3750 to be in multiple vlans then usually cisco to cisco interconnect would ultise VTP for vlan propagation however this wont occur between the Huawei switch, so you will need to manually add the vlans on the switch also.
so to summarize below is a basic host switch config for 3750.
conf t
no ip routing
hostname XXXXXX
username xxxx privilege 15 secret xxxxxxx
service password-encryption
enable secret xxxxx
security passwords min-length xx
security authentication failure rate xx log
aaa new-model aaa authentication login default local
logging buffered 4096
no service udp-small-servers
no service tcp-small-servers
service timestamps debug datetime msec localtime
service timestamps log datetime msec localtime
no ip domain-lookup
spanning-tree mode rapid-pvst
spanning-tree portfast bpduguard default
int vlan x ( this may or not be vlan 1 - its whatever the L3 vlan interface is on the core switch for management connectivity)
ip address x.x.x.x y.y.y.y.
exit
ip default-gateway x.x.x.x ( ip address of CORE SVI management interface)
vlan x,x,x,x ( add the L2 vlans to the switch as vtp would not be used between the Huawei switch)
exit
int gigx/x
Description Link to Huawei switch
switchport trunk encapsulation dot1q
switchport mode trunk
switchport nonegotiate
no shut
( no need for spanning-tree portfast trunk- this is usually only for ESX host ports)
int rang fa0/1 -48
Description - Access-ports
switchport host
switchport access vlan x (wihout this defaults to vlan 1)
no shut
clock timezone gmt 0
ntp peer
ntp server x.x.x. prefer
res
Paul

Interconnecting Catalyst 3750 and 2948G-L3

I am trying to interconnect a Catalyst 3750 and a 2948G-L3 using fiber GBIC. The interfaces where the GBIC and fiber are attached show up as physically down. I have tried different ports and also changed both switches. No Luck. If I connect a 3524 to the 3750 using the same connection it works.
Are 2948G-L3 switches compatible with the 3750?
Thanks,
VT

Should have no problem. Can you try the following on the 3750's gig interface:
speed nonegotiate
See of the link comes up.
Please rate all posts.

Lock speed/duplex on Gigabit-interface in Catalyst 3750?

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