Cisco Switching/Routing :: 3750 Stack - 10GB And 1GB Connections

May 22, 2012

I have two 3750 stacks that are currently connected using two1GB fiber connections in an etherchannel. I now added new switches to each stack with 10GB modules in them. We would like to bring up the 10GB connection, but still have one of the 1GB lines as a backup, or even the whole etherchannel. Is there a way for us to make the 10GB the main and the 1GB the standby?

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Cisco Switching/Routing :: X2-10GB-SR Compatible With 3750-E?

Jan 31, 2012

i will be buying 2 x 3750-E and will connect our server with 10G to the x2 port of 3750.  is X2-10gb-SR compatible with this? do i need any converter module?

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Cisco Switching/Routing :: Adding 3750 To Stack?

Dec 6, 2011

I have two  3750s stacked and one 3750 standalone all in one data closet. The both have the same versions. I want to combine them to make one stack. How do I force the standalone to be the master? sw 1 priority XX(Higher then the existing stack)? Both the stack and the standalone have management addresses. Would it be ok to delete the stack ip address? That way, the standalone(master's address will be the only management address)?How should I connect the standalone 3750 to the stack? At present, the 3750 stack is connected via a cascade cable going from the stack 1 port of the top switch to the stack 2 port of the bottom switch.

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Cisco Switching/Routing :: 3750 Stack Port

May 19, 2013

I have a stack of 4 3750 Switches.
 
1. WS-C3750G-12S
2. WS-C3750G-12S
3. WS-C3750X-48P
4. WS-C3750X-48P
 
The stack cable connected to Switch 1 Port 1 and Switch 4 Port 2 will not come back online. The logs show that there was a Stack line change. I have replaced the 1 meter Stack cable from Switch 1 to Switch 4 three times and it still does not come back online. This is the part that is interesting.. I have disconnected Port 1 Switch 4 and connected it to Port 2 Switch 4 and then Switch 4 came back online. This made me think Port 2 on Switch 4 was working correctly. Then I disconnected Port 2 Switch 1 and connected it to Port 1 Switch 1 and then Switch 1 came back online.

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Cisco Switching/Routing :: 3750 Stack CPU Utilization?

Feb 20, 2013

i have two cisco 3750 in stack firts, master switch have all swports busy second have only 5 how can i see cpu utilizations of the second switch, and its reasonable to move somme devices from first switch to second for deacreases of cpu and memory utilisatio ns of the master? the stack tehnologies use both cpu as one? or its only for simple management ?

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Cisco Switching/Routing :: Stack Port Down On 3750

Mar 11, 2013

have a cable i think is bad, is it possiable to switch the cable out without causing any downtime to the switch or connected devices?
 
HQ-1st-Flr-Stack#show switch stack-ports summary
Switch#/  Stack   Neighbor   Cable    Link   Link   Sync      #         In 
Port#     Port              Length    OK   Active   OK    Changes   Loopback
Status                                          To LinkOK   

[Code].....

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Cisco Switching/Routing :: Upgrading A Stack Of 3750

Apr 29, 2012

I just need a little refreshing on upgrading a stack of 3750's.  This stack only has 2 switches: [code]

1.) If I remember correctly I simply tftp the IOS to the flash of each switch and then reload the master only?
2.) Can I safely assume these are the 2 flash locations:

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Cisco Switching/Routing :: 3750 / Add A New Switch In Stack?

Jun 21, 2012

i want to remove an access layer 3750 48 POE master switch and replace with a  new 3750 switch in the stack. i want to copy the same configuration to new switch since the old switch is having POE issue and I got replacement of the malfunctioned switch. we have VTP domain is configured in the network...

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Cisco Switching/Routing :: 3750 Add A Config To Stack?

Mar 15, 2012

I have been given 2 3750 switches and need to put a config onto it wuld is for 2 3750's in a stack, how should I put this on the 2 switches?  Is it bested to install it onto 1 switch first then physically attach the 2nd after?

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Cisco Switching/Routing :: Add Stack Member 3750?

Jul 10, 2012

One of the stack member has failed and we need to replace the same with the new one.
 
[code],....

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Cisco Switching/Routing :: 3750 12.2(46) WCCP Stack

Nov 21, 2011

I'm setting up a web cache using the wccp protocol on a Catalyst 3750 stack.
 
Probably missing something real simple here but when I from the global configuration mode are trying to enter the ip wccp command it just says "invalid input" from wccp. There is no such command.. should be supported on my device from IOS 12.2(37)

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Cisco Switching/Routing :: Etherchannel Does Not Go Up / Up From 3750 Stack To 6k5 Vss

May 19, 2012

We have two 6k5 configured as vss and it is working fine. For each floor we have a 3750 stack. In each 3750 stack we have 4 switches. From the first 3750 we have a fiber link to the first 6k5 and from the fourth switch we have another fiber link to the other 6k5 switch, for each floor/3750 stack, both configured as etherchannel. We installled each 3750 stack/floor in different maintenance windows; in all these installations we have problems configuring the etherchannel. After we configure the etherchannel on 3750 stack and in the vss, the etherchannel does not go up/up. We see the etherchannel up/down; after a lot off work, try and error, configuring shut/ no shut, adding and excluding links from the etherchannel; in any aleatory moment the etherchannel goes up/up and works fine. Is there any bug related with these IOS versions, or is there any right procedure to configure etherchannel from vss to 3750 stack?

3750 stack config (IOS
Cisco IOS Software, C3750 Software (C3750-IPBASEK9-M), Version 12.2(50)SE1, RELEASE SOFTWARE (fc2))
interface GigabitEthernet1/0/1switchport trunk encapsulation dot1qswitchport trunk allowed vlan 100,101,371,372switchport mode trunkchannel-group 1 mode on!interface GigabitEthernet4/0/1switchport trunk encapsulation dot1qswitchport trunk allowed vlan 100,101,371,372switchport mode trunkchannel-group 1 mode on!interface Port-channel1switchport trunk encapsulation dot1qswitchport trunk allowed vlan 100,101,371,372switchport mode trunk

[code]....

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Cisco Switching/Routing :: 3750 Stack And Trunking

Mar 5, 2012

I currently have 5 3750s connected via Stackwise. This stack is connected back to my core (6509s) via fiber (1Gig to Core1 & 1Gig to Core2). I want to move the 5th 3750 to another closet due to an addition of a new patch panel. Due to max length of 10 ft. for stackwise, my plan is to connect this 5th switch back to the stack using trunked fiber ports, with them being an etherchannel (2Gig). Also plan to use single fiber port form 2 different switches in the stack to provide some redundancy for the 5th switch. Should I be alert of any issues with this connection design? Do I need to properly remove the 5th switch from the stack using, no sw 5 provison sw-model or can I just disconnect stackwise and connect back with fiber?

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Cisco Switching/Routing :: Adding A New 3750 To Stack

May 29, 2012

I had 2 3750 stacked and one of them decided to die (power supply) cisco replaced it and now i want to re-add that switch to stack. I have already upgraded my replacement switch to the same IOS version.I was reading that i can do it without powering down operational 3750 so the action plan so far is:
 
-power down NEW member
-connect stacking cable
-power up
 
as you can see my switch 2 is now a master and it still holds config of all Gi ports for switch 1. If i connect my NEW switch without any config (vlan.dat and startup-config) will my existing switch 2 copy all ports config to new switch ?

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Cisco Switching/Routing :: 3750 Stack Crash

Oct 22, 2012

We had an "Event" on our process network at the mill yesterday.  I connected a new WS-C3560V2-48TS-S to our network and we lost communications with all of the other switches.
 
The core is a stack of 3 WS-C3750 switches, one is a -24TS-1U and the other two are -12S-S.  These connect to 10 WS-C3560G-24TS and 5 Rockwell Stratix 8000 (IE3000) over fiber.  I am planning on replaceing two 24 port switches with the new 48 port.  I had the switch configured and running at my work bench.  It was connected to the network with one sfp module and ran all weekend with no issues.  Yesterday afternoon I took it to the network cabinet and installed it.  I powered it up and connected two sfp modules to the fiber patch panel and made the connection at the core stack. 
 
Everything looked OK.  I had communication link lights working on everything.  Within minutes, we lost communication with every switch connected to the core stack.  I shut down the new 48 port switch and the network slowly came back up.
 
The new 48 port is configured with Flex Links for the fiber redundancy protocol and was connected to each of the 3750G-12S-S stack members.
 
I though it might have been a power issue but the stack is UPS protected and shows it has been up for over 10 weeks.  I'm not even sure "Crash" is the best decription for what happened.  The new switch has a high enough IP address that it would not take over as a IGMP Querier.

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Cisco Switching/Routing :: Mixed 3750-X And 3750G In A Stack?

Jul 17, 2012

Any one try to form a stack with mixed 3750-X and 3750G? Is there any prerequisites in hardware and software?

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Cisco Switching/Routing :: Add A New 3750x To Existing Stack Of 3750

Aug 2, 2012

I've a situation where I need to add a new 3750x to a existing stack of 3750. [code] When I tried to stack them together, I get a version mismatch error. Is this because of the difference in SW Image?  What are my options next ? My ultimate goal is to make the new switch stack correctly with the exisitng switches.

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Cisco Switching/Routing :: Stack Behaviour Of 3750 Switch

Nov 17, 2012

I configured 3750 A  switch with vlan 20 and its IP address 192.168.20.41Its default gateway was 192.168.20.3Then i configured 3750 B  switch with same default gateway and vlan 20 IP   192.168.20.43My question is now when we stack it becomes single switch and now vlan 20 ip address is 192.168.20.43 thats only IP i can see.So how does stack switch choose vlan 20 IP?Does it choose highest IP address between two switches if they have same vlan 20 as in my case?Also when i go to switch 3750 b by session command and do sh ip route  it does not show ip default gateway .Also it shows vlan 20 as admin down .

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Cisco Switching/Routing :: Changes In TP If Replace 3750 Stack With 3750GS

Jan 4, 2013

I am replacing our 2 3750s which are in a stack and are running in VTP server mode for the domain with 2 new 3750Gs.  There are 4 trunks to other switches which bare in client mode and 2 trunks to 2 ASAs which are in active/standby mode (one in each switch).  Anyway what will happen to the VTP clients when I replace the stack as the revision number will be 1 on the server?  The clients will ignore any VTP updates from the server ?

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Cisco Switching/Routing :: 3750-X - How To Shutdown Only Switch In Stack

Aug 11, 2011

I have a doubt. In my environment I have two Switch 3750-X in stack.

My question is: How to shutdown remotely only a switch in stack?

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Cisco Switching/Routing :: Cat 3750 Stack Basic Settings?

Dec 13, 2011

attached diagram and following is the basic configuration on L3 and L2 switch. Is this configuration sufficient for simple routing?
 
L3SWITCH:
switch 1 priority 15
switch 2 priority 10

[Code].....

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Cisco Switching/Routing :: Adding 3750X To Stack Of 3750?

Jul 17, 2012

I am getting a version mismatch when adding the following 3750X to the 3750 stack:
 
   WS-C3750X-48       12.2(55)SE3           C3750E-UNIVERSALK9-M
      2 0     WS-C3750-24TS     12.2(25)SEA           C3750-I9K91-M
 
Can I upgrade the 3750's to be able to correct this?  Which version does this require?

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Cisco Switching/Routing :: 3750 Stack Power Connectivity?

Apr 21, 2013

What will be the recommended connectivity of stack power cable in 6 number of 3750x switches ?
 
Is it similar to the stack cable ?

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Cisco Switching/Routing :: 3750 - Removing Switch From Stack Of Three

Oct 30, 2011

We have a stack of 3 cisco swithes 3750s WS-C3750G-24TS 12.2(25)SEB4 .We plan to recover a switch from the stack as it is not needed any more The switch we plan to recover is the existing Master.If we change the priority (switch 1 priority) and make another switch the master using command line will we have any loss of connectivity to the servers conecting to the stack ?

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Cisco Switching/Routing :: 3750 - Running 7 To 9 Switches In One Stack

Aug 6, 2012

Looking for feedback from other organizations that have large 3750 stacks.  I've got one stack of (8) 3750's composed of (6) 3750G's and (2) plain 3750's.  This particular stack is usually unresponsive to SNMP queries and often fails to write config when we make changes.  After a couple tries it will finally go.  Part of my probably here is likely the plain 3750's that always boot faster and come up as the master.  I should manually set the master to one of the G's.  What I'm wondering is who else has 7-9 3750's stacked and are they performing well for SNMP, telnet, etc?  I've got another newer stack of 7 3750E's that I need to add one more switch to.  Need to decide if I want extended downtime to break the stack up or just add the 3750X to make member 8 and hope it performs well.  I have 50+ 3750 stacks working great on our campus.

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Cisco Switching/Routing :: Zero Downtime 3750 Stack Upgrade?

Jun 10, 2011

Zero downtime 3750 stack upgrade?

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Cisco Switching/Routing :: 3750 Stack - Recommended IOS Version?

Apr 4, 2011

I have 8 switches (different models) configured in stack:
 
Switch Ports Model              SW Version            SW Image------ ----- -----              ----------            ----------     1 28    WS-C3750G-24TS-1U  12.2(55)SE            C3750-IPSERVICESK9-M     2 26    WS-C3750-24P       12.2(55)SE            C3750-IPSERVICESK9-M     3 30    WS-C3750X-24P      12.2(55)SE            C3750E-UNIVERSALK9-M     4 30    WS-C3750X-24P      12.2(55)SE            C3750E-UNIVERSALK9-M*    5 12    WS-C3750G-12S      12.2(55)SE            C3750-IPSERVICESK9-M     6 30    WS-C3750E-24PD     12.2(55)SE            C3750E-UNIVERSALK9-M     7 30    WS-C3750E-24PD     12.2(55)SE            C3750E-UNIVERSALK9-M     8 30    WS-C3750X-24P      12.2(55)SE            C3750E-UNIVERSALK9-M
  
Now I'm have IOS ver. 12.2(55)SE but from time to time I'm experiencing strange system freezing. It means that all systems connected to the stack are working very, very slow. It hapens ones, sometimes twice a month and takes 5 minutes. I didn't find anything strange in logs (neither on switch nor router). I would like to install other IOS version. Could you recomend me the most stable version for this stack (built from these different models) ?And the secound question:  - Is it possible to copy SE1 manualy to every switch and reload one by one manualy. Will they join the stack and work fine after reload or maybe there will be a IOS mismatch ?

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Cisco Switching/Routing :: Catalyst 3750 And 3750X Together In One Stack?

Nov 20, 2011

if I read the Datasheet of Catalyst 3750X-Series-Switches it is possible to connect a new X-Switch to an existing and old Catalyst 3750-Series Stack.What kind of requirements are needed? Only same IOS-Version in the hole Stack and if possible same Feature-Set? .... like in a normal NOT mixed Stack?

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Cisco Switching/Routing :: Zero Downtime 3750 Stack Upgrade

Feb 3, 2009

Zero downtime 3750 stack upgrade 

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Cisco Switching/Routing :: 3750 Stack Crossing Mandatory

Feb 23, 2012

Every link and guide i see about stacking two 3750 switch , the port 1 is connected to port 2 on the other switch and vice versa

i mean you can connect port 1 to port 1 on the other and connect their port 2 to each other

1- is it any benefit in the cross connection ?
2- do i encounter any problem if i stack a 24ts with a 48ts or a 12s-s (all are 3750)
3-i stacked two switches with each other and the ports became 1/0/* and 2/0/* and then i removed stack but on second switch the ports are still 2/0* !! when there is only one switch the interfaces should be 1/0/*

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Cisco Switching/Routing :: Set Up A Monitor Session With 3750 Stack

Aug 20, 2012

i have just set up a monitor session with a 3750 stack .Simple enough task you would think.But i only seem to be seeing broadcast packets !!Now there is definitely unicast traffic being used on the host i am monitoring.I have done the basic commands

-monitor session 1 dest int fas 5/0/24

-monitor session 1 src int fas 5/0/34

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Cisco Switching/Routing :: 3750 - EtherChannel Cross-Stack With EMC VNX

May 22, 2013

We are configuring a new EMC VNX, and plan to use Ether channel with our 3750x stack.  We would like to configure it for both additional bandwidth and for redundancy.  What is the best configuration to use?  Should we trunk the channel or use switch port mode access, and use channel-group on or protocol LACP (which state active or passive)?

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Cisco Switching/Routing :: 3750 Stack Switches IOS Upgrade?

Nov 13, 2012

I am trying to do ios upgrade on 5 stacked 3750 switches. All the switches have different model number, so i am wondering which image file i should download. As far as i understand all the stacked switches should have the same IOS, i may be wrong. The switches have the following model numbers and SW images;
  
Switch   Ports  Model              SW Version              SW Image
------   -----  -----              ----------              ----------
     1   28     WS-C3750G-24PS     12.2(35)SE5             C3750-IPSERVICESK9-M
*    2   28     WS-C3750G-24PS     12.2(35)SE5             C3750-IPSERVICESK9-M
     3   52     WS-C3750G-48PS     12.2(35)SE5             C3750-IPSERVICESK9-M
     4   30     WS-C3750E-24PD     12.2(35)SE5             C3750E-UNIVERSAL-M
     5   30     WS-C3750E-24PD     12.2(35)SE5             C3750E-UNIVERSAL-M
 
which image file i should use as they all have different model numbers and Cisco provides different image files for each model.

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