Cisco Switching/Routing :: Adding 3750 Switch To Existing Stack?
Nov 23, 2011
I am looking to add a new 3750 Switcch to an existing stack shown below
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 26 WS-C3750-24P 12.2(35)SE5 C3750-IPBASE-M
2 26 WS-C3750-24P 12.2(35)SE5 C3750-IPBASE-M
3 26 WS-C3750-24P 12.2(35)SE5 C3750-IPBASE-M
[code]....
I have looked on notes to add a switch to an existing stack and haven’t identified answers on how the IOS will be affected on the new switch – will it downgrade to the current stack version or will the current stack upgrade to its version. At this moment in time I would prefer if the new switch IOS downgraded to the current stack IOS version.The new switch is a 3750V2 – will this affect how it joins the stack?The new switch has the image of IPBASEK9-M – again will this affect how it joins the stack?
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Mar 25, 2012
in our network we were using three 3750-48-s switches with stacking one of the switch due to some hardware failure power problem,
now i want to add a new switch 3750-48-s in the existing Stack two switches , the old two switches ios version is = 12.2(25r)SEC the new Catalyst 3750 io verion is = 12.2(35)SE5
how to add this switch in the existing two stack switches , with documentation
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Oct 16, 2012
I am attempting to add and Catalyst 3750 - 12 port Gigabit switch to an existing stack of 3750 48 port switches (non-X fabric). I am not sure how to proceed. These are the two questions/thoughts I have. Any additional perspective I should have before proceeding.
What kind of configuration should I apply to the Gig switch before adding it to the stack?I am sure I will need to assign priority to the new switch, ideally, it will act as master.
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Dec 6, 2012
I am having an issue with adding a c3750x switch to an existing switch stack Currently there is 2 x WS-C3750X-48P and I am trying to add another WS-C3750X-48P to this switch I have cabled the switch to the stack using the stack cables and added the command to provision the switch on the exisitng stack. However when I turn the switch on it just goes on its own stack.
I noticed the new switch had a later version of IOS so have downgraded this to the same version as the other switches but still no joy Here is the sh ver from the exisitng stack
uptime is 4 weeks, 4 days, 23 hours, 30 minutes
System image file is "flash:/c3750e-universalk9-mz.122-53.SE2/c3750e-universalk9-mz.122-53.SE2.bin"
License Level: ipbaseLicense Type: PermanentNext reload license Level: ipbase
cisco WS-C3750X-48P (PowerPC405) processor (revision A0) with 262144K bytes of memory.Processor board ID FDO1448Z0FJLast reset from power-on21 Virtual Ethernet interfaces1 FastEthernet interface156 Gigabit Ethernet interfaces6 Ten Gigabit Ethernet interfacesThe password-recovery mechanism is enabled.
[code]....
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Sep 12, 2012
We have a WS-C3750G-24PS switch running 12.2(50)SE , C3750-IPBASEK9-M in production & stand alone and we want to ask a new Cisco WS-C3750-24P running 12.2(55)SE3 , C3750-IPBASEK9-M into the stack with the 1st one.
Just want to know if it is possible and are there any problems with the IOS being different version.
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Oct 1, 2012
I need to add two additional 2960S switches to my stack. I saw a diagram that showed how a 4 switch stack can be connected, but I couldn't find much detail on adding a switch to an existing stack (besides master election). The output below shows how the existing stack is connected and its state
SW#sh switch detail
Switch/Stack Mac Address : 0011.2222.3333
H/W Current
[Code].....
I will need to break one of the stack rings between SW1 and SW2 in order to connect the new switches. Does it really matter which ring I break to connect the additional switches? Does one ring act as primary? If so, I'd rather not break that ring so this process is transparent as possible. Also, is there any benefit to disabling the stack port vs just disconnecting the cable?
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Feb 27, 2013
I have to add a 2960s PoE switch to an existing stack of two 2960s PoE switches. If The new switch has no configuration on it and the existing stack is broken by pulling te stack cables and then new cables are added and everything re-cabled correctly will the new switch assume the configuration from the stack without any issues?
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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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Sep 22, 2012
I have 3 3750 staking switch with the following configuration:
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
1 Member 442b.0350.9400 1 1 Ready
2 Member 442b.0357.8780 2 1 Ready
3 Master 442b.036f.a800 3 1 Ready
The new switch is installed to be wired to the master switch. the swtich 3 (* 3 Master Ready 442b.036f.a800)my question is: if you disconnect the wiring from the master stack to connect to the new switch, it is possible that the new switch change the current configuration of stacking.
-Can I just add the new switch with clean configuration without changing the current configuration ?
-How is assigned the stack number? i need the new switch be with the GI4 / x?. I can I manually by assigning ports?
-If I want to the new 3750 member witch lower prioridad, can I change priority before adding to stack?
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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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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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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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Apr 2, 2012
The company I work for owns a remote manufacturing facility that houses a stack of five 3750 switches that function as the core switching system for the plant. DHCP services are configured on the 3750 stack.
There are currently three VLANs configured, one for data and one for voice (144 and 244 respectively) and one for UCM servers (200), with corresponding subnets of 10.44.32.0 /19, 10.44.0.0 /19 and 10.44.100.0 /24.
The current DHCP scope configurations are as follows:
ip dhcp pool Plant-44_DHCP
network 10.44.32.0 255.255.224.0
default-router 10.44.33.254
[Code].....
My question is will the addition of this scope in the manner presented cause any problems with PCs or IP phones outside the targeted recepents receiving the wrong IP information from this scope?
I plan to identify the users that should be members of this VLAN 444 and change the switchport mode access configuration on the corresponding switch ports from VLAN 144 to VLAN 444. The voice VLAN 244 will remain the same.
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Mar 23, 2012
I have a Catalyst 3750 I want to add to an existing stack (same models) through the stackwise port We use some complex QoS and other features on our network, and I'm not sure how much configuration I need to do on the new switch before adding it to the stack. Since this is going into an existing setup?
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Jan 23, 2013
We have a cisco stack with 5 ws-c3750-24p 12.2)55)SE3 c3750-ipbasek9-m switches. Can i add a switch to the stack that is the following model: ws-c3750g-48ts 12.2(25)see3 c3750-ipbase-m
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Feb 29, 2012
I currently have Cisco 3750G which is currently live and active and fully populated and only have remote access.
I have an additional same switch which I would like to stack. My initial plans were to have 2 GIbit etherchannels, but I came across the option to Stacks both switch with each other.
When I do a show switch on the live switch its set as a Member: [code]
I would like to add the new switch to the stack without losing the config for the switch which is live. I understand that the highest priority of the switches becomes the Master but as the live switch is Priority 1, would chancing this affect the switches config, or would it lose connection at all?
Also when I plug in the new switch and it reboot how do I ensure it becomes the slave without rebooting the live switch?The cables on the switch do they have to go to port1 on the live switch and port 1 on the new switch or can they be port 1 and port 2?
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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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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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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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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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Feb 7, 2011
I have a stack with a lot of stack-port changes, but on all the ports, how can I determine the faulty switch in the stack, cables are already verified. We did also a restart of the whole stack power off/on
running version
WS-C3750-48P 12.2(55)SE C3750-IPBASEK9-M
This is the output after 6weeks
Switch#/ Stack Neighbor Cable Link Link Sync # In Port# Port Length OK Active OK Changes Loopback Status To LinkOK -------- ------ -------- -------- ---- ------ ---- --------- -------- 1/1 OK 4 1
[Code].....
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Jan 6, 2013
In the current set up I have a LAN stack of 5 3750 switches configured as an access stack. As per the requirement I need to partition the current 5 switch stack into two individual stacks of 3 & 2 switches respectively. Kindly let me know the step by step process withh all the necessary commands, reloads and reconnections. I purpose to do it by changing the priority of current member switch to 15 so that its elected as Master in the new partitioned switch stack. But not sure what all steps required and in which order.
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Oct 2, 2012
One switch of our stack of 8 3750 have reboot with no reason. Nobody was in the room server when it appears et there was'nt any electrical problem at this moment.
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Nov 12, 2011
I have four-switch Cat 3750 stack that has been working reliably for a couple years. Suddenly the other morning it reboots itself, and has been doing so every 24 hours since. take a look at the attached log? This should really be a Smartnet thing, but as it turns out the warranty we have on this is not Smartnet .
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Dec 26, 2012
We are having 3750 Stack switch as our edge switch. Here we are having some issues as low memory & itermediate High CPU utilization.For memory when we checked its shwoing maximum memory is allocated to DHCPD receive & ARP Input as follows
Processor Pool Total: 70829380 Used: 56809532 Free: 14019848
I/O Pool Total: 12582912 Used: 8554920 Free: 4027992
Driver te Pool Total: 1048576 Used: 40 Free: 1048536
[code].....
i want to understand why this 2 proceses (DHCPD & ARP input) taking more memory?High CPU: We also facing intermediate high CPU utilization (above 95%). When CPU is high there were 2 processes consuming more CPU are 'Spanning Tree' (about 20%) & ARP Input (about 66%). we also checked the ARP entries, there were 1500 ARP entries & 2 incomplete ARP (out of 6000 ARP supported)
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Dec 11, 2011
At a customer i've tried to add a new 3750 switch til a running stack.I used the following proccess:
1. connect stack cables to the new switch
2. bootup new switch.
Normally the new switch will become a member of the stack, but here, the switch says its the stack master. I can see that the stack port from the old switches connecting the new is up.The only way i could make it work was to provisioning the new switch as switch nr x, save, power off and then connect it and boot it up.The IOS i the same on all switches.
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Nov 30, 2011
I have WS-C3750-48PS-S, i wanted to implement GLBP on this switch, Is it possible to configure GLBP on this switch?
IOS : c3750-ipservicesk9-mz.122-55.SE4.bin
Part number: WS-C3750-48PS-S
[Code].....
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Dec 20, 2012
I have stack of 2 switches 3750?I config etherchannel between them.
here is result
2 Po2(SD) LACP Fa1/0/15(I) Fa2/0/15(I)
Both ports are up up but standalone Int port channel 2 is down down.Need to know if this is default behaviour when we config etherchannel between stack switches?
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Nov 20, 2012
is there a document that explains the compatibility of 3750 series that can be stacked together? for example can we stack 3750-x with 3750-v2 without the power sharing? Can we stack a L3 3750 with L2 3750 without upgrading the L2 switch IOS to ip services?
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Oct 27, 2012
We have a live stack with 4 Cat 3750 switches of mixed varieties. Switch 1 crashed the other day and didn't come back up. A power reset brought the switch online again, and switch 2 is now running as the stack master. We are going to replace switch 1 in a staged approach to minimise client downtime. Switch 1 is a ws-c3750-48ts and we will be replacing it with a ws-c3750g-48ts. I will be pre-provisioning and installing the new switch into the stack as switch 5 and configuing the ports to be the same as switch 1. The cables will then be moved over from switch 1 to switch 5 so the changeover time should be minimal. When all cutover, I'll power down switch 1, reconfigure the stack cables and remove switch 1 from the stack.
My question is to what occurs next. If I perform a 'no switch 1 provision ws-c3750-48ts' will I be left with switch 2 through to 5 (ie no switch 1)? I can live with this moving forward. I know I can renumber switch 5 to be switch 1 if I want, but my understanding is that I have to reload the member switch which is something I'd like to avoid at this stage. In my reading, I saw the statement - "Note: You cannot use the switch current-stack-member-number renumber new-stack-member-number global configuration command on a provisioned switch. If you do, the command is rejected." I'm a bit confused by this statement, I'm assuming that it is saying that if I do as above but don't issue the 'no switch 1 provision' command, I cannot renumber switch 5 to switch 1 but as long as I use the 'no switch 1 provision' command first, I can renumber switch 5 to switch 1? Will all of my switch 5 port configuration information and any associated references (eg port-channel configuration etc) be changed from gi5/0/x to gi1/0/x if I do renumber?
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Jun 5, 2012
I have a Cisco 3750G-48PS Running IOS 12.2(40) and was wondering how many physical ports are supported in an LACP Configuration. Is it 4 or 8 ports in a single switch.
If I have a dual 3750 stacked together, and I want to configure (8) port LACP, Can I take (4) ports from each switch in the stack and LACP together.
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Mar 26, 2012
I have been looking at the Cisco Hardware docs and I can't find anything on the proper way to setup a 2 switch stack for Stackwise redundancy and Stackpower redundancy. Everything details 3 or more switches.
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Jan 16, 2012
I have 4 switches in a 3750-X stack.Here is the output from the stack why are the switches out of order and I'm not able to bring up switch 1 port 1.
switch 4 port 2 shows not connect it is I've checked the cables.
Power stack name: Powerstack-4
Stack mode: Power sharing
Switch 1:
Power budget: 695
Low port priority value: 22
High port priority value: 13
Switch priority value: 4
Port 1 status: Shut
Port 2 status: Connected
Neighbor on port 1: 0000.0000.0000
Neighbor on port 2: c471.fe84.e100
Switch 2:
Power budget: 713
Low port priority value: 21
High port priority value: 12
Switch priority value: 3
Port 1 status: Connected
Port 2 status: Connected
Neighbor on port 1: c471.fe85.3000
Neighbor on port 2: c471.fe80.2800
Switch 4:
Power budget: 697
Low port priority value: 19
High port priority value: 10
Switch priority value: 1
Port 1 status: Connected
Port 2 status: Not connected
Neighbor on port 1: c471.fe80.2800
Neighbor on port 2: 0000.0000.0000
Switch 3:
Power budget: 710
Low port priority value: 20
High port priority value: 11
Switch priority value: 2
Port 1 status: Connected
Port 2 status: Connected
Neighbor on port 1: c471.fe84.e100
Neighbor on port 2: c471.fe7f.eb00s
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