Cisco Switching/Routing :: 2960s / Add One More Switch In Stack?
Apr 29, 2013
I have a running setup having 2 Cisco 2960s 24 TS switch with Stack configuration. Now I want to add one more same Cisco switch. My questions are:-
1) How can I do this...(Should follow the same process as I did before.
2) Could I do this without impacting the service. i.e. without rebooting the switch.
3) What should be the connection archiecture as of now since there is two switch so it is connected 1 -1 and 2-2. but for 3 switch should we require to change the connectivity.
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Apr 18, 2012
I was just curious about something with upgrading a 2960s stack.
To copy the image to the switches in the stack I use: Switch# archive download-sw tftp://x.x.x.x/filename
Does this also set the image as the boot image or do I still need to issue the boot system flash command?
can I just issue this command on the master switch and reload and the new config will be pushed to the rest of the switches?
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Jun 4, 2012
I have a stack of 2960S (c2960s-universalk9-mz.122-55.SE2.bin) and the master has failed (used to have a priority of 14). The second switch has become master (priority 1) as can be seen below: [code]
If I connect a new blank 2960S (same IOS) through the stack ports, will the master sync its config to the new one without causing problems?As I understand the new blank switch will also have a priority of 1 and will by default be numbered as 1. So if the config is correctly synced and I later on want to make switch 1 the master, I need to set the priority: [code]
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Sep 23, 2012
I have a live 28port Catalyst 2960S switch. By live I mean that there is an essential piece of equipment plugged into this switch that can suffer little to no downtime. Over the course of time the number of devices patched into this location has increased to exceed the 24 ports available and we have had to resort to adding unmanaged switches to fill the need. We have acquired an additional 2960 & stacking modules that I would like to stack together, keeping the existing switch as the master. It is my understanding that the stacking modules are hot-swappable and that this member switch can be added without bringing the master switch down, thus creating zero down time for the financial server that is connected.
The steps I believe that need to be followed are as such: write mem to existing switch and backup to our TFTP serverinstall the stack module in the existing (while powered up) and new (while powered down)place the 2 redundant FlexStack link cables on both switchesthen simply power the member switch on After boot the member switch will get it's OS and configuration from the master and I can begin moving CAT5 cables from the unmanaged switches to the stack.
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Mar 11, 2013
I would like if is possible to stack a Cisco 4900M with a 2960S. I know it is not the most common situation but i need it.
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Mar 11, 2013
I would like to know if i can and how stack a Cisco 4900M with a 2960S. I know it's not the most common but i need it.
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May 7, 2013
I have 4 switchs 2960s in stack, but this not full ring. [code]the interface stack 1 for switch 1 is down and interface stack 2 for switch 4 is down.I do insert this command "switch 1 stack port 1 enabled" but interface are not up.
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Aug 9, 2012
I'm connecting the two devices above and I need an LC to SC fiber cable. It should be pretty simple but I've seen two different types of LC/SC cables - one is 8.3/125 and one is 62.5/125. I believe the 62.5 is an older cable type but when looking at the detail sheets for each of the SFPs I see that both of these support a 62.5 or 50 micron core size.
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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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Mar 5, 2013
I have an 2960S all configured, with vlans, ports configurations and others.Now, I bought other 2960S and two stack modules to create a stack with these 2 switches.We call:
-Switch1 (I have configured and in production)
-Switch2 (New switch, no configured)
Can I connect these two switches in stack without lost the configuration of my Switch1 and no turn-off this switch? Does not stop the users access?
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May 6, 2013
I have a single 2960s without stack module. The stack port has a status of down, however I'd like to disable it so that it does not generate a false alarm in my NMS. The documentation states that there should be a command "switch 1 stack port 1 disable" but the switch (running 15.0(2)SE2) doesn't seem to be available. Is this a dcumentation bug or is the command not there at all?
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Dec 1, 2010
I have a new problem with Catalyst 2960S. We have four switch in a stack and now I get the message:
“%PLATFORM_RPC-3-MSG_THROTTLED: RPC Msg Dropped by throttle mechanism: type 37, class 14, max_msg 32, total throttled 73968 (hostname1-2)”
Traceback= 13A686C 160862C 160E0B4 15E2088 184FD48 18467B8
sh switch de
Switch/Stack Mac Address : 68bd.abc9.0000
H/W Current
[Code]....
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Nov 5, 2011
applied an iOS update to a stack via tftp. I used the archive Download-sw tftp:// method. I rebooted the stack after complete and it never came back up. I discovered the master switch upgraded but not the member. The member was sitting there with all amber lights on and frozen after the iOS load. The master wouldn't finish boot until I removed the member from the stack. I had a version mismatch and they would not communicate.
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Oct 11, 2012
I would like to use flexstack to stack two Cisco 2960S 48 Port switches (2960S-48TD-L) for redundancy. Each switch will have a single 10G uplink into our Nexus 7K. One switch in the stack will terminate to linecard 6 (N7K-F248XP-25) and the other switch will terminate to linecard 7 (N7K-F248XP-25). My question is how many flexstack cables are needed? Do I need only one cable or do I need two to connect the two 2960s ?
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May 15, 2013
I have 2 Catalyst 2960S-switches configured in a stack. The uplink is configured as a cross-stack etherchannel. Now I want to upgrade the stack with a minimum of downtime for the connected hosts. The hosts are connected to the stack via cross-stack etherchannels. So my question is: How can I upgrade the stack and reboot the members with a minimum of downtime? If I use the archive download-sw command with the /reload-option, the stack is reloaded and the result will be downtime for the hosts while th stack is reloading. Is it possible to upgrade the stack and then reboot the members one by one in a controlled manner?
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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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Jan 21, 2013
I use the Switch 2960S support PoE and 10 access points cisco.I have one more question:
-- If all 10 access points cisco use copper cable to connect to 2960S, 5 access points use power adapter and 5 access points use power from Switch. How Switch 2960S will provide power for 10 AP or switch 2960S will understand and only provide power for 5 APs?
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Dec 11, 2012
We have a Cat2960-S Series PoE+ currently running 12.2(55) SE5 ios with SW image C2960S-UNIVERSALK9-M.We want to upgrade the ios to the lastest version but found there are 2 version: 12.2(53) SE2 and 15.0(1) SE.Which is the best & suitable for upgrade?
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Jun 5, 2013
After i have already configured my cisco switch 2960 , i configured my console as the below [code] after i reboot my switch , i found that the switch asked me for username . However i did not configure username , how can i solve this problem , without password reset . I have already configured 15 switch , 100% this problem will be in all switches.
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Jan 20, 2013
I have hybrid network in which I want to configure VLAN on Cisco 2960 S switch. I have unmanged switch where my DHCP server and other servers are connected. Now I created two VLANs on cisco 2960S and they don't talk each other, but as soon as I connect unmanaged switch to 2960S switch, both VLANs start communicating which I don't want. I want to listen server traffic from unmanaged switch from both VLANs but simultaneously I don't want to communication between two VLANs.
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Oct 3, 2012
I have enabled syslog on my Cisco 2960S swtich as shown below -
-logging facility local6
-logging host 10.11.12.122 transport tcp port 514
I have sent the port to TCP since that is what is configured on the SYSLOG server which is a CENTOS 5.8, running rsyslogd.I have tested the rsyslogd locally and it work.However i want to send any and all log messages in the buffer to my syslog server and it is not working.there is no firewall on the CENTOS and the ASA firewall filter is enabled for outgoing traffic.
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Nov 9, 2012
Unable to access switch from outside the local network. Can get to all routers and PC's
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Sep 21, 2012
I have a problem with extending the LAN on a client site . They are looking to extend the LAN with a 2960S-series switch. Already in place is a 4510 switch which the 2960 is connected to via fibre. The 2 switches are both set up but there is no connectivity as I cant ping between them or anything. The management VLAN on the 2960 shows line up, protocol down, which I believe means the VLAN is enabled but there is a form of physical mismtach on the ports. I have attached the configs of both switches. I feel it might be a problem with GBIC module compatibility. The SFP installed on both ends of the switch are GLC-SX-MMD. On the 4510, the SFP sits in a twingig converter (CVR-X2-SFP) but there is no light on it at all when the cables are plugged in.
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May 9, 2012
I config mdix on port gi1/0/7 as mdix auto IT does not show in running config.Is there any way or command which i can use to verify mdix on port?
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Apr 11, 2012
I have a Cisco 2960S stack and I'd like to tune the timers so that packet loss is minimal if a switch fails.To simulate a failed switch I have reloaded it while running a continuous ping to a management address on the stack's SVI: [code] As I see the same results when a ping is directed through the single switch (switched), and through the firewall (routed), I'm inclined to think that this is due to the stack failover timers on the Catalyst 2960S.Is it possible to change the stack failover timers (i.e hold down, failover etc), to speed up the failover process?
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Feb 5, 2012
I have a new Cisco 2960 S series switch with a basic configuration that needs to be uplinked or daisy chained to a Cisco 3750 switch. I am not getting any connectivity to the network with either a straight through or crossover cable. the port remains in amber but a 'show interface' indicates that the interface is up. I can manage the switch with a PC patched into any port on the switch with a static IP address. Must be something very simple that I am missing. Outlined below is the configuration.
Refresh_SW1#sh ver
Cisco IOS Software, C2960S Software (C2960S-UNIVERSALK9-M), Version 12.2(55)SE3,
RELEASE SOFTWARE (fc1)
Technical Support: [URL]
[Code].....
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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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Mar 27, 2013
Which is the best and advanced IOS for c3750x-48P-E stack switch among below listed IOS.
c3750e-universalk9-mz.122-58.SE2 ?
or
c3750e-universalk9-mz.122-55.SE6..??
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Jun 17, 2012
have one 3750G stack with 4 switches and this stack is presenting the follow log message:
%PLATFORM_UCAST-4-PREFIX: One or more, more specific prefixes could not be programmed into TCAM and are being covered by a less specific prefix, and the packets may be software forwarded.
In this stack we are using the layer 3 with OSPF routing, and the current sdm prefer is default:
switch-01-3750#sh sdm prefer
The current template is "desktop default" template.
The selected template optimizes the resources in
the switch to support this level of features for
8 routed interfaces and 1024 VLANs.(code)
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Mar 13, 2011
We have existing stack of 3 units of WS-C3750-48TS-S ( 100 mbps ports with Gigabot uplinks). with IOS as follows, Can we add WS-C3750G-48PS-S in this same stack (this is 48 Gigabit ports)?
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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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