Cisco Catalyst 3750 - is there a gigabyte version?

We have a Cisco Catalyst 3750 SFP enhanced image, it's 10/100, is there a 1000GHz version of this now?

Hi,
Any 3750 model with "G", i.e. 3750G and all 3750-E models
Check this links
3750 http://www.cisco.com/en/US/products/hw/switches/ps5023/prod_models_comparison.html
3750-E http://www.cisco.com/en/US/products/ps7077/prod_models_comparison.html
Regards,
Dandy

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Debian Linux Bonding and Cisco Catalyst 3750 - best practise?

Hello everybody,
I would like to know what's best practice to do this:
The two NICs of a Debian Linux server wants to be connected with two Switchports of a Cisco Catalyst 3750 switch(stack). My goal is to have load-balancing and failover.
My /etc/network/interfaces looks like this:
iface bond0 inet static
       address 192.168.0.30
       netmask 255.255.255.0
       network 192.168.0.0
       broadcast 192.168.0.255
       gateway 192.168.0.1
       dns-nameservers 192.168.0.10 192.168.0.20
       dns-search xyz.mycompany.com
       slaves eth0 eth1
       bond_mode ???
       bond_miimon 100
       bond_downdelay 200
       bond-updelay 200
First question: What bond mode should I use?
The switchports looks like this:
interface GigabitEthernet3/0/4
switchport access vlan 20
switchport mode access
spanning-tree portfast
What changes are necessery here? Something like this?
interface GigabitEthernet3/0/4
switchport trunk encapsulation dot1q
switchport mode trunk
spanning-tree portfast
Thanks a lot for suggestions, hints, etc.! :-)
Greets
Stephan

Hi Michael,
thanks a lot for your answer - and sorry for my late reply!
I like to show you my solution - I hope that it is a solution. ;-)
My config on the switch(stack):
switch#show etherchannel summary
Group Port-channel Protocol    Ports
------+-------------+-----------+-----------------------------------------------
2      Po2(SU)         LACP      Gi3/0/3(P) Gi4/0/3(P)
switch#show running-config interface GigabitEthernet 3/0/3
Building configuration...
Current configuration : 172 bytes
interface GigabitEthernet3/0/3
description myserver, eth0
switchport access vlan 20
switchport mode access
channel-group 2 mode active
spanning-tree portfast
end
lansw01#show running-config interface GigabitEthernet 4/0/3
Building configuration...
Current configuration : 172 bytes
interface GigabitEthernet4/0/3
description myserver, eth1
switchport access vlan 20
switchport mode access
channel-group 2 mode active
spanning-tree portfast
end
switch#show running-config interface port-channel 2
Building configuration...
Current configuration : 82 bytes
interface Port-channel2
switchport access vlan 20
switchport mode access
end
The /etc/network/interfaces of my Debian machine looks like this:
auto lo
iface lo inet loopback
auto bond0
        iface bond0 inet static
        address 192.168.1.xxx
        netmask 255.255.255.0
        gateway 192.168.1.xxx
        dns-nameservers 192.168.1.xxx
        dns-search xxx.xxx.xxx
        bond-mode 4
        bond-miimon 100
        bond-downdelay 200
        bond-updelay 200
        bond-lacp-rate 1
        slaves eth0 eth1
This setup seems to work well. But I'm wondering that there is nothing with "trunking" in my setup. Would you like to give me your opinion about this?
Thanks a lot and many greets
Stephan

I cannot connect by console port to Cisco Catalyst 3750 using ethernet to USB.

Hello. I have one Cisco Catalyst 3750 switch, and two 2950 switches. I am trying to reset their settings using a console cable with a trendnet Ethernet to USB adapter. When I try loading hyperterm or putty on com3 there is no signal. I have the communication port setting on com3. I don't know what the old settings are, and they can be reset. I get connectivity lights when plugging the cable into the switch ports. What am I missing?

Are you definitely using the correct COM Port number? On Windows7 Right Click My Computer > Manage Then select Device Manager and expanPorts (COM & LPT)d in my case is shows Prolific USB-to-Serial Comm Port (COM5).
Once you have the right COM Port number just use the default settings in Putty. You may find the COM Port is locked up which will require a reboot.

VLAN trunking from Cisco Catalyst 3750 to Cisco SF300-48P issue and related

Hello expert,
I'm having difficulties to configure VLAN trunking between Cisco Catalyst 3750 switch with Cisco SF300-48P switch and my workstation unable to get any DHCP IP from our DHCP server via Cisco SF300-48P switch. Below is the snippet of configuration on both switches:
[Cisco Catalyst 3750 Switch]
interface GigabitEthernet1/0/45
description NCC-CC-1stFlr
no switchport trunk encapsulation dot1q
no switchport trunk allowed vlan 101-103
spanning-tree portfast
[Cisco SF300-48P Switch]
interface fastethernet48
spanning-tree link-type point-to-point
switchport trunk allowed vlan add 101-103
macro description switch
!next command is internal.
macro auto smartport dynamic_type switch
interface fastethernet29
switchport mode general
switchport general allowed vlan add 103 tagged
switchport general pvid 103
Are these are correct? Kindly advice!
Thank you very much!
Regards,
Alex

Hi Alex,
for the trunk port on Catalyst on port GE 1/0/45, we need to enable the trunk and for on encapsulation dot1q because this catalyst model is ISL capable also and the SF300 working only with Dot1q Encapsultion
The configuration on catalyst should :
#config terminal
#interface Gi 1/0/45
# switchport encapsulation
#switchport trunk encapsulation dot1q
#switchport mode trunk
#switchport trunk allowed vlan 101-103
#spanning-tree portfast
For SF300 the port trunk it looks fine but for the port where the PC should receive an IP address
#interface fastethernet29
#switchport mode access
#switchport ccess vlan 103
Please let me know after this configuration
Thanks
Mehdi
Please rate or mark as answered to help other Cisco Customers

Cisco Catalyst 3750-X or 3560-X Series Switches

Recently, our company was deciding to buy Cisco switches, but they just tell the requirements and I finally focused on two kinds of switches, Cisco Catalyst
3750-X or 3560-XSeries Switches? Who can tell me, tnx in advance.

As I read a blog recently, it listed the specific differences between Cisco 3750-X and 3560-X, except for the common features of Cisco 3750-X and 3560-X, Cisco 3750-X can also offer-- Cisco StackPower technology: An innovative feature and industry first for sharing power among stack members;
Cisco StackWise Plus technology for ease of use and resiliency with 64 Gbps of throughput;
Investment protection with backward compatibility with all other models of Cisco Catalyst 3750 Series Switches.
And made a more detailed comparison between the two products, for ur reference.

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

Cisco Catalyst 3750 & Linksys SGE2000P

Hello everyone,
I m in the process of addin new switches with Gigabit port in my server room, actually I have a single switch 48 port (a Cisco 3550) that is connected to a Core Switch via fibre channel but I need to migrate some of my server in a gigabit mode. My management did not allow me to buy a new Cisco switch, because the model with 24 port Gigabit is a bit expensive. so I need to find another solution.
My first thought was to buy a Linksys SGE2000P, and connect it to our Core switch via a fiber channel, to do that I must be sure that a SGE2000P is compatible with my Core switch (3750 12 port SFP) so here is my question does anyone around here has already tried that ? :-)
Thanks in advance
regards,
Arnaud Leresche

I think there should be no compatibility issue BUT I have not personally tried it.

Netflow on Cisco Catalyst 3750 Metro Series Switches

Does netflow possible in 3750 metro series?

Hi Syed,
You have to first check if there is any image in switch or not so that you can manually boot from switch: prompt but as you said there is no image in the switch you have to go for xmodem procedure to upgrade the switch.
Have a look at this link and just follow step by step instructions and you will be good to go
http://www.cisco.com/en/US/products/hw/switches/ps607/products_tech_note09186a00800946e5.shtml#xmodem
HTH, if yes please rate the post.
Ankur

Alternative switch to Cisco Catalyst 3750v2-24FS and 3750-24FS

I`m looking for an alternative to these two switches:
1. WS-C3750V2-24FS-S Cisco Catalyst 3750V2-24FS Switch with 24 100FX SFP + 2 Gigabit Ethernet SFP Ports
2. Cisco Catalyst 3750-24FS (WS-C3750-24FS-S 100BASE-FX)
They are now EOL and not available.
I have a campus style network and need to be able to connect multiple 100FX fibre switches back to a central switch. The 1st unit uses 100FX SFP modules and the second has in-built 100FX ports. I`m struggling to find anything from Cisco that will give me multiple (i.e 12+) 100FX ports.
Could anyone please point me in the right direction?
Many thanks,
Paul

Hi Paul ,
Replacement for both switch is WS-C3650-48TS-S.
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps5528/eos-eol-notice-c51-730227.html
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps5023/end_of_life_c51-687707.html
Regards
Don't forget to rate helpful posts
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Catalyst 3750 Ingress SPQ/SRR behavior

Do Cisco engineers review this community at all?
I am working on the latest version of QoS standard for our Enterprise and noticed the following conflicting information officially provided by Cisco.
My question relates to ingress/pre-ring Strict Priority Queue (SPQ) logic.
Cisco Catalyst 3750 QoS Configuration Examples document states that SPQ on ingress is configured and serviced as follows
mls qos srr-queue input priority-queue 2 bandwidth 10
mls qos srr-queue input bandwidth 90 10
SPQ services Q2 up to the configured 10% of ingress bandwidth
Any excessive traffic in Q2 is not dropped, but is serviced by SRR in accordance with the configured weights
For example, a momentary 5Gbps of aggregated ingress EF traffic will be serviced in the following way
SQP services 10% of total ring's bandwidth, or 3.2Gbp, leaving 1.8Gbps for SRR processing
SRR services excessive 1.8Gbps in accordance w/ weights Q1 - 90 and Q2 - 10, such as Q1 gets 25.92Gbps and Q2 get 2.88Gbps more.
The following pictures provides in-depth look into Ingress queuing logic.
Alternatively, Cisco Medianet Campus Design v4.0 provides the following example w/ comments
C3750-E(config)#mls qos srr-queue input priority-queue 2 bandwidth 30
! Q2 is enabled as a strict-priority ingress queue with 30% BW
C3750-E(config)#mls qos srr-queue input bandwidth 70 30
! Q1 is assigned 70% BW via SRR shared weights
! Q2 SRR shared weight is ignored (as it has been configured as a PQ)
Basically, they now say Q2 bandwidth weight is ignore because it is configured as Strict Priority Queue. Doesn't it look contradictory?
In my humble opinion Medianet (or SRND v4.0!!!) provides an incorrect information re ingress queuing on Catalyst 3750 platform.
I am not sure I can easily test it, providing that an internal ring must experience a congestion. I don't think I can send more than 32Gbps of traffic into any of my lab 3750 switches.
Also, I don't think this mistake can be critical in my environment as I don't expect to have momentary full capacity load on those... but it can be critical for others.
Much appreciate
Tim

Cisco Catalyst WS-C3560-48TS and DLINK 3120 interface errors

Hello,
We are getting a lot of FCS-Err in one FC- GIgabit trunking interface between Cisco Catalyst WS-C3560-48TS running IOS Version 12.2(25)SEE3 and DLINK 3120 Firmware 4.00.015.
Our config in the cisco is the following:
interface GigabitEthernet0/1
description SWITCH-Dlink01
switchport trunk encapsulation dot1q
switchport mode trunk
macro description cisco-switch
spanning-tree link-type point-to-point
We have tried without "macro description cisco-switch" and "spanning-tree link-type point-to-point" too and the problem persist.
If we run "sh interfaces counters errors"
Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize
Gi0/1 0 11423 0 11423 12516029
The errors counters in the DLINK are growing very fast too.
Usually these errors are related with hardware or cable problems, we have changed the cable, the SFP and the port, but the problem is still there.
We have activated the debug for the interface and syslog, but we aren't getting any error.
Do you have any idea about this issue or how to troubleshoot it?

Hi,
Try to hard set the ports on both sides to Gig/full duplex and test again.
HTH

Cisco Catalyst 3750V2-24FS-S can't accept GLC-FE-100FX SFP Transceiver

I have Cisco Catalyst 3750V2-24FS-S with OS version 12.2(55)EY, the problem it's can't accept GLC-FE-100FX SFP module, it's show
unsupported SFP error but it' work fine with GLC-FE-100LX.
Cisco 100-Megabit Ethernet SFP Modules Compatibility Matrix in bellow link show WS-C3750V2-24FS-S work with Transceiver Models :
GLC-GE-100FX
GLC-FE-100FX
GLC-FE-100LX
GLC-FE-100BX-D
GLC-FE-100BX-U
http://www.cisco.com/en/US/docs/interfaces_modules/transceiver_modules/compatibility/matrix/OL632702.pdf
Any help is appreciated

Hi,
I'm connectiong to 100FX SFP ports ( 1 to 24), showing error message:
“ %PHY-4-SFP-NOT-SUPPORTED: The SFP in Fa1/0/1 in not supported”
Thanks

Connection of LC/APC fiber patch cords to Cisco Catalyst 6500 $ Cisco Access 3750 Switches

I have an LC/APC fiber patch cord infrastructure and I want to connect it to Cisco Catalyst 6500 & Cisco Access 3750 Switches. what type of transceiver should be used?
I read a note on Cisco website stating the following for Cisco SFP+ transceivers:
Note: "Only connections with patch cords with PC or UPC connectors are supported. Patch cords with APC connectors are not supported. All cables and cable assemblies used must be compliant with the standards specified in the standards section"

Thank you, but my question is that I have a single mode fiber patch cord with LC/APC connector while cisco stating a note that only use LC/PC or LC/UPC type of connectors with SFP+ transceiver.
So what type of transceiver should I use to connect LC/APC patch cord to cisco switches? Is there another type or SFP+ still can be used?

What version of IOS for catalyst 3750

Hi,
What version of IOS should I use for a Catalyst 3750? I don't need layer 3 functionality, but I do need SSH support.
Which version is the most stable?
Can I run the 3750 off a bin image instead of a .TAR image?
If I do use the bin image what functionality am I using. I don't use the HTTP functions and turn those off
Our Catalyst 3750's that come in come with the TAR image. and that isn't compatable with LMS 2.5.
Is the bin file in the TAR image, the same as the BIN file in the non tar image?

12.2(25)SEB2 should be a good release to run. You can just use the .bin file if you do not need the web interface. Yes the bootable IOS image is the same in .bin and .tar file.
You can dowload the crypto images from CCO at
http://www.cisco.com/cgi-bin/tablebuild.pl/cat3750-crypto

Last version Cisco Catalyst 2960-24PC-L Switch (bugs study)

Hi team,
I need know, what´s the last IOS version to Cisco Catalyst 2960-24PC-L Switch and understand the bug study about these versions?
How make a bug study?
If you have any information, please let me know.
Regards,
Yerko.

Latest release as of January 14th is 15.0.2-SE5 (Release Nov 6, 2013)
There aren't any public utilities in the Cisco website that provides you with a bug study.
We have a bug tracker https://tools.cisco.com/bugsearch/?referring_site=popular but it will be extremely time consuming to identify each bugs and if you are affected.
If you are a Cisco Advanced customer with optimization services in your contract, this deliverable can be done for you at no cost.

Cisco Catalyst 3750 - is there a gigabyte version?

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