Catalyst 3750 Switch

How many total Vlans can you create in Catalyst 3750 Switch ? I read a document about Catalyst 3750 Switch. This document is said that "Although the switch stack supports a total of 1005 (normal-range and extended-range) VLANs, the
number of routed ports". However, I am not sure. Can you confirm for me ? Thanks

this link should be of some help to answer your question.
http://www.cisco.com/en/US/products/hw/switches/ps5532/products_command_reference_chapter09186a00803ec324.html#wp1031710
HTH-Cheers,
Swaroop

Similar Messages

Password problem on Catalyst 3750

Hi all,
I am an Unix administrator and we lost all account and password informations to connect on a Catalyst 3750 switch.
Is there a way to connect to the switch (With a serial cable?) an to create a new account without losing the configuration ?
Thank's for your reply.
Regards.

This method won't reset the configuration.
During the boot process, you rename the current configuration so it doesn't get loaded.
rename flash:config.text flash:config.old
When the switch boots, it loads a blank image. Then you rename the config file and load it into the running config and you can change the logon credentials to something you know.
It's important that you follow the steps exactly so you don't lose the configuration. Password recovery is a pretty common procedure.
The only other method of recovery is if you have a copy of the current running configuration. Send me a private message if you have this config and we can discuss the possibility.

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

Could connect two Nexus 5648 to a stack of Catalyst 3750?

Good Morning,
Can I connect a two Nexus 5600 (switchs distribution) with switch Catalyst 3750 (switch access)?
I have tried to integrate the Nexus switch in the network as switch distribution, replacing a Catalyst 6500 switch and does not work. Everything is going very slow. Although all the ping function properly.
Is there any incompatibility connect two nexus 5648 to a stack of Catalyst 3750 by VPC?
Thank you.
Greetings.

Hi,
There can be many reasons for the switches not joining the stack like SDM template mismatch.
You may go through the following document:
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/troubleshooting/switch_stacks.html#wp40112
Thanks
Ankur
"Please rate the post if found useful"

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.

Catalyst 3750 and VRRP

Can you tell me if your Catalyst 3750 switch (*not* the –E or –X variants) support VRRP ipv4? If so what version of firmware do I need?
Thanks - Walt

Walt
Support for VRRP was added in version 12.2(58)SE.
See this link for details -
http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3750-series-switches/product_bulletin_c25-658743.html
Jon

Trying to interconnect Catalyst 3750 with cwdm sfp module

hi,
I try to interconnect 2 Catalyst 3750 switch use cwdm sfp fiber module.
If just plug in, there is no link between 2 switchs.
What's the procedure to make this?
Thanks

you have 2 options with CWDM at the moment. the first option is to use any or all to the 8 wavelenght SFPs: CWDM-SFP-1470= (gray) thru CWDM-SFP-1610= (brown)
with passive multiplexers (MUX) as described here:
http://www.cisco.com/en/US/products/hw/modules/ps5455/products_data_sheet09186a00801a557c.html
or
In the off chance you have only a single strand of fiber available, you would choose:
1000BASE-BX10-D AND 1000BASE-BX10-U SFP FOR SINGLE-FIBER BIDIRECTIONAL APPLICATIONS
as described here:
http://www.cisco.com/en/US/products/hw/modules/ps5455/products_data_sheet0900aecd8033f885.html
Overall, CWDM is a cost effective method of building a Metro-Ethernet LAN / SAN by providing a single pair of single mode fiber the ability to support 8 wavelengths. You can mix and match these wavelengths with 1Gb Ethernet or 2Gb FiberChannel as needed.
rate if helpful
thanks,

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

VLAN on 3750 switch

I am trying to create a SVI on a catalyst 3750 switch but when I do a show int vlan , it indicates the line protocol is down.What could ve the problem and how do I get it up?
Here is my config:
Switch#vlan database
Switch(vlan)#vlan 700 name Management
Switch(vlan)#exit
Switch#conf t
Switch(config)#int vlan 700
Switch(config-if)#ip address 172.16.1.1 255.255.255.0
Switch(config-if)# no shut
Switch(config-if)#^z
What did I do wrong and whatz the way forward ?

Hi Friend,
It will remain in line down state till the time you ceate any active port for that vlan.
Suppose you craete SVI for vlan 700 you have to assign any physical port to that vlan or else create a trunk port and allow that vlan on that trunl and the line protocl will come up.
So in short any SVI should have a physical port assignment or there should be an active trunk for that vlan.
HTH, if yes please rate the post.
Ankur

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?

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.

Catalyst-3750-series-switches -stack switches

Hi,
I have to show the temperature of each of the stack members in the switch. The MIB that I am using is CISCO-ENVMON-MIB ;
I am trying to parse the ciscoEnvMonTemperatureStatusDescr to get the temp instance for each switch instance.
is this the correct way?.

Here is the output from one of the standalone 3750 switch in my lab:
SW01#sh switch
Switch/Stack Mac Address : 1111.1111.1111
                                           H/W   Current
Switch# Role   Mac Address     Priority Version State
*1       Master 1111.1111.1111     1      3       Ready
SW01#sh switch stack-ring s
Stack Ring Speed        : 16G           <<<<<<<<<<<<
Stack Ring Configuration: Half        <<<<<<<<<<<<
Stack Ring Protocol     : StackWisePlus
SW01#sh switch stack-ports
Switch #    Port 1       Port 2
    1          Down         Down
SW01#
-Terry

Catalyst (3750 24 10/100/1000T) and (3750 12 SFP) Stacking Problems

Dear all
I'm having a very strange situation here (at least for me)
we have 4 core switches
2 x   WS-C3750G-24T-S Catalyst 3750 24 10/100/1000T + IPB Image
and
2 x   WS-C3750G-12S-S Catalyst 3750 12 SFP + IPB Image
Stack configuration is done this way
when the switches are powered on, the first two SFP core switches are seen as a single stack with the stack master LED turned green on the first switch
the other two (24 10/100/1000T) switches have the RPS LEDs always green, mode cannot be changed, and cannot be accessed by Console connection
but when the (24 10/100/1000T) are powered off, the first (SFP) switch in the stack reports that " Switch 3 and 4 has been removed from Stack "
which means they are stacked but there's something wrong, because
only the SFP ports are shown in the " Show interfaces status " , the ethernet ports of the bottom switches are not present !!!
can you please tell me what's the poblem ?

Dear Daniel
Sorry for my delayed response but i was actually quite busy
but the problem was actually in another sense
the default profile for the Catalyst 3750 SFP is the Aggregate SDM Template
while the 3750 10/100/1000 ethernet Switch Default SDM profile was Desktop profile
so i had an SDM mismatch
DATACENTER#sh switch detail
Switch/Stack Mac Address : 081f.f3cf.1c80
                                           H/W   Current
Switch# Role   Mac Address     Priority Version State
*1       Master 081f.f3cf.1c80     1      0       Ready
2       Member 081f.f3cf.5900     1      0       Ready
3       Member aca0.16ac.0180     1      2       SDM Mismatch
4       Member aca0.16a3.bc80     1      2       SDM Mismatch
         Stack Port Status             Neighbors
Switch# Port 1     Port 2           Port 1   Port 2
1        Ok         Ok                2        4
2        Ok         Ok                3        1
3        Ok         Ok                4        2
4        Ok         Ok                1        3
all i did was changing the default profile of the SFP switches into the Desktop Profile and problem was solved
switch 1 provision ws-c3750g-12s
switch 2 provision ws-c3750g-12s
switch 3 provision ws-c3750g-24t
switch 4 provision ws-c3750g-24t
system mtu routing 1500
ip subnet-zero
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
vlan internal allocation policy ascending
interface GigabitEthernet1/0/1
interface GigabitEthernet1/0/2
interface GigabitEthernet1/0/3
interface GigabitEthernet1/0/4
interface GigabitEthernet1/0/5
interface GigabitEthernet1/0/6
interface GigabitEthernet1/0/7
interface GigabitEthernet1/0/8
interface GigabitEthernet1/0/9
interface GigabitEthernet1/0/10
interface GigabitEthernet1/0/11
interface GigabitEthernet1/0/12
interface GigabitEthernet2/0/1
interface GigabitEthernet2/0/2
interface GigabitEthernet2/0/3
switchport trunk encapsulation dot1q
switchport mode trunk
interface GigabitEthernet2/0/4
interface GigabitEthernet2/0/5
interface GigabitEthernet2/0/6
interface GigabitEthernet2/0/7
interface GigabitEthernet2/0/8
interface GigabitEthernet2/0/9
interface GigabitEthernet2/0/10
interface GigabitEthernet2/0/11
interface GigabitEthernet2/0/12
interface GigabitEthernet3/0/1
interface GigabitEthernet3/0/2
interface GigabitEthernet3/0/3
interface GigabitEthernet3/0/4
interface GigabitEthernet3/0/5
interface GigabitEthernet3/0/6
interface GigabitEthernet3/0/7
interface GigabitEthernet3/0/8
interface GigabitEthernet3/0/9
interface GigabitEthernet3/0/10
interface GigabitEthernet3/0/11
interface GigabitEthernet3/0/12
interface GigabitEthernet3/0/13
interface GigabitEthernet3/0/14
interface GigabitEthernet3/0/15
interface GigabitEthernet3/0/16
interface GigabitEthernet3/0/17
interface GigabitEthernet3/0/18
interface GigabitEthernet3/0/19
interface GigabitEthernet3/0/20
interface GigabitEthernet3/0/21
interface GigabitEthernet3/0/22
interface GigabitEthernet3/0/23
interface GigabitEthernet3/0/24
interface GigabitEthernet4/0/1
interface GigabitEthernet4/0/2
interface GigabitEthernet4/0/3
interface GigabitEthernet4/0/4
interface GigabitEthernet4/0/5
interface GigabitEthernet4/0/6
interface GigabitEthernet4/0/7
interface GigabitEthernet4/0/8
interface GigabitEthernet4/0/9
interface GigabitEthernet4/0/10
interface GigabitEthernet4/0/11
interface GigabitEthernet4/0/12
interface GigabitEthernet4/0/13
interface GigabitEthernet4/0/14
interface GigabitEthernet4/0/15
interface GigabitEthernet4/0/16
interface GigabitEthernet4/0/17
interface GigabitEthernet4/0/18
interface GigabitEthernet4/0/19
interface GigabitEthernet4/0/20
interface GigabitEthernet4/0/21
interface GigabitEthernet4/0/22
interface GigabitEthernet4/0/23
interface GigabitEthernet4/0/24
that's it !
: D
cheers

Make Fiber Ports Live on Catalyst 3750?

Hello All,
Have 2 Catalyst 3750's connected via fiber to the cisco gbics converts. Both gbic's are plugged into Slot 1 of 4 on the switches. Everything is physically hooked up correctly. My question is what command do I type to make the fiber ports active? I know the fiber led should go orange for 30 sec then green when you plug the fiber cable in the gbic but it's not working because I've got to make that port or interface active first right? Any help would be appreciated. Thanks in advanced!

Double check the cabling. Unplug one of the patch cables from one of the gbics. Look at which connector on the gbic has the light coming out of it. Compare to the fiber patch for which connector has light coming out of it. Ensure you have the fiber plugged into the gbic such that light from one connects to dark on the other. Do this at both ends.
Also, pull the gbics out of the switches & validate both are appropriate for the fiber type you are using. 1000-LX is for single mode fiber; 1000-SX is for multimode fiber.
If you have the interface administratively shut down, this will fix it:
int gig 0/1
no shut

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.

Catalyst 3750 Switch

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