Stacking of 3 switches?
when stacking of 3 switches in row?what will happen for the end nodes(pc,workstation) connected to 2nd unit (switch) of a stack when its port or hardware fails?
what are the main advantage?
it will share power only or
unit1
unit2
unit3
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
If you're referencing physically stacked switch members, which function as one logical switch, there's no advantage to single homed hosts, beyond you might be able to repatch such to another stack member or replace the failed stacked member with less effort (i.e. faster).
The principle advantage, for hosts, is when they have links to different stack members in a Etherchannel configuration. With that, there's more bandwidth to/from host and host doesn't lose connectivity if just one port or stack member fails.
Regarding power sharing, yes some physical stacks allow that too.
Similar Messages
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Ensure HA for servers on stacked Cisco 3750g Switches?
Please bear with me. I'm fairly new to the sys admin world. Though I have a grasp on Cisco Switch technology, the grasp is certainly not solid. I've been tasked by my IT director with finding a device-level redundancy plan for our critical systems. We have four stacked 3750g switches. How would I setup the technology so if the switch with the servers connected were to fail, the downtime would be minimized? Should I deploy a RPS2300? What about the supervisor engine? From what I understand, the supervisor engine is virtual when using stacked 3750s. Is server NIC teaming neceassary? Does the LACP protocol need to be considered? As you can see, I've got a lot of catching up to do. Ultimately, I need guidance so I'm not this plan in the wrong direction by confusing appropriate technologies.
Thanks in advance.Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
You've already correctly identified some methods for HA with 3750s.
As you note, the stack provides "supervisor" redundancy, i.e. if stack master fails, another stack member will take over. One thing to watch for, if your stack master is running IP Services, you'll want at least one other stack member to have that IOS installed (and licensed).
Regarding hosts, ideally if they support Etherchannel/Portchannel to the stack, you can have critical hosts connected to two different stack members, so if one path fails, connectivity isn't lost to the host. For hosts that don't support that, or are not critical, you might have some "spare" VLAN ports in other stack members. I.e. if a stack member fails, manually repatch such hosts to another stack member port. (If fact, ideally, you might have one additional stack member already in the stack, so for such single connected hosts, downtime is the time it takes to repatch [then you work about replacing the failed stack member].)
On the power issue, the RPS would allow usage of a secondary power circuit and it also covers, I believe, failure of a stack member's A/C power supply (those don't fail too often, and if it does on a 3750G, you might need to replace the whole unit[?]). However, the RPS doesn't handle loss of A/C power on both paths (and when it takes over, I also recall, you need to reload the stack to revert off it). So, you might also want to consider UPS too (if other parts of the network might still be operational). Depending how you implement UPS, you might not need an RPS, for example if each stack member had its own UPS and each UPS could be reconnected to another power line.
PS:
For additional stability, if not already running it, 12.2(55)SE8 is considered, by many, as being very stable. -
CISCO 3750X stacking for 5 switches , only 4 switches are coming in stack
Dear All,
I have 5 cisco 3750X switches ,but only 4 switches coming up 5 switches i am unable to see .
Connection for the switch :Please find the attached snapshot for the stack data connection .
Also find the snapshot for the stack power connection .
Please provide your assistance and support to overcome this issue .Dear Marvin,
Thanks for your reply.
is my connection provided in attachment for data stack are ok .
i login to Switch # 5 through console
following is the result :--
switch: ?
? -- Present list of available commands
arp -- Show arp table or arp-resolve an address
boot -- Load and boot an executable image
cat -- Concatenate (type) file(s)
copy -- Copy a file
delete -- Delete file(s)
dir -- List files in directories
flash_init -- Initialize flash filesystem(s)
format -- Format a filesystem
fsck -- Check filesystem consistency
help -- Present list of available commands
memory -- Present memory heap utilization information
mgmt_clr -- clear management port statistics
mgmt_init -- initialize management port
mgmt_show -- show management port statistics
mkdir -- Create dir(s)
more -- Concatenate (display) file(s)
ping -- Send ICMP ECHO_REQUEST packets to a network host
rename -- Rename a file
reset -- Reset the system
rmdir -- Delete empty dir(s)
set -- Set or display environment variables
set_bs -- Set attributes on a boot sector filesystem
set_param -- Set system parameters in flash
sleep -- Pause (sleep) for a specified number of seconds
type -- Concatenate (type) file(s)
unset -- Unset one or more environment variables
version -- Display boot loader version
switch: version
C3750E Boot Loader (C3750X-HBOOT-M) Version 12.2(58r)SE, RELEASE SOFTWARE (fc1)
Compiled Tue 26-Apr-11 06:59 by abhakat
switch: boot
Loading "flash:/c3750e-universalk9-mz.122-58.SE2/c3750e-universalk9-mz.122-58.SE2.bin"...flash:/c3750e-universalk9-mz.122-58.SE2/c3750e-universalk9-mz.122-58.SE2.bin: no such file or directory
Error loading "flash:/c3750e-universalk9-mz.122-58.SE2/c3750e-universalk9-mz.122-58.SE2.bin"
Interrupt within 5 seconds to abort boot process.
Boot process failed...
switch:
All other 4 switches i can see in stack but not these switches and also the status light for this switches is blinking green please provide your assistance . -
Multiple VLAN's and relaying DHCP on two stacked SGE2000-G5 Switches
We have been set the task of securing a small managed office system which is currently set up with a standard switch allowing each of the offices (containing different companies) to see each other, and in some cases, access each others documents across the network.
Obviously this is a far from adequate set up and our aim is to isolate each office using VLAN's but share a common internet connection provided by the managed offices. We have two Cisco SGE2000-G5 layer 3 switches but we are new to Cisco equipment and VLAN's so we are not quite sure on how to implement this. DHCP would need to be provided by a Router, there is no Server. We are open to suggestions on the Router as we have yet to purchase one.
I hope someone can be of assistance.
Many thanks,
JimWe will be using the SGE2000-G5 switch which supports Layer3. You suggested the following routers the other day, do these support Option 82?
wireless
RV120W - good feature set wireless
WRVS4400N - has gigabit speed ports as well as simplied webGUI
RV220W - most features with gigabit spped ports
wired
RV042 - dual WAN with port-based vlans
RVS4000 - Gigabit speed ports
Thanks,
Jim -
Power Redundancy problem for cisco 3750 stack switches
Hi Team,
I have installed and configured cisco 3750X series switches in stackwise. Those are having dual power supply.
Power redundancy test performed:
1. Removed one of the power supply and inserted it back.
2. once the first power supply is ready, removed another power supply and switch got rebooted.
please find the below stack-power output:
JP2-RDC-DIS-02#sh stack-power detail
Power Stack Stack Stack Total Rsvd Alloc Unused Num Num
Name Mode Topolgy Pwr(W) Pwr(W) Pwr(W) Pwr(W) SW PS
Powerstack-2 SP-PS Stndaln 700 477 223 0 1 2
Powerstack-1 SP-PS Stndaln 700 477 223 0 1 2
Power stack name: Powerstack-2
Stack mode: Power sharing
Stack topology: Standalone
Switch 2:
Power budget: 223
Power allocated: 223
Low port priority value: 22
High port priority value: 13
Switch priority value: 4
Port 1 status: Not connected
Port 2 status: Not connected
Neighbor on port 1: 0000.0000.0000
Neighbor on port 2: 0000.0000.0000
Power stack name: Powerstack-1
Stack mode: Power sharing
Stack topology: Standalone
Switch 1:
Power budget: 223
Power allocated: 223
Low port priority value: 22
High port priority value: 13
Switch priority value: 4
Port 1 status: Not connected
Port 2 status: Not connected
Neighbor on port 1: 0000.0000.0000
Neighbor on port 2: 0000.0000.0000
Can anyone help what went wrong here?
Thanks
ManishCosmetic bug
CSCui21029 3750X Stack no standalone stays in running configureation as standalone
Symptom:
When you are configuring a 3750x stack and initially putting it into a stack ring topology by configuring the following.
Switch(config)#stack-power switch 1
Switch(config-switch-stackpower)#sta
Switch(config-switch-stackpower)#no stan
Switch(config-switch-stackpower)#no standalone
You will see that in the running configuration it shows up as standalone mode
stack-power switch 1
switch mode: standalone
stack-power switch 2
switch mode: standalone
Conditions:
3750X stacks with any license level
Workaround:
none -
Is it possible to get logs from a 3850 Cisco member switch in a stack?
%STACKMGR-1-STACK_LINK_CHANGE: MEMBER: 4 stack-mgr: Stack port 2 on switch 4 is down
%STACKMGR-1-STACK_LINK_CHANGE: STANDBY:2 stack-mgr: Stack port 1 on switch 2 is down (OC-SWTCH)
%STACKMGR-6-SWITCH_REMOVED: STANDBY:2 stack-mgr: Switch 3 has been removed from the stack.
I recieved errors on a 3850 switch 3 in my stack, it's removed from my stack and after 5 minutes it comes back up. I want to know what the switch was doing for those 5 minutes, is it possible to get the log files for only switch 3? Telneting to the switch stack or connecting a console cable directly to switch 3 only gives me the logs for master switch logs. Ideally when a switch reconnects to a stack, the master switch should ask the joining switch for it's logs, and merge them into it's own logs so it has a record of the switch did when it wasn't communitating.HI,
create a internal with type of the structure and populate values into that n do wat ever u want.
ex:
data: itab type zstruct occurs 0 with header line. // where zstruct is a structure in a database.
select * from .............. into table itab where ...............
loop at itab.
write:/10 itab-fld1,
20 itab-fld2,
endloop.
if helpful reward some points.
with regards,
suresh aluri. -
Switch 2 was removed from stack unexpectedly and again joined stack
Hello,
we have 2 switches in stack, last night switch 2 was removed from stack and got rebooted and again it got back in stack.
Switch -2 entered into the provisioned mode for certain span of time. snap shot is attached .
Apr 9 02:36:25.266 IST: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state DOWN
Apr 9 02:36:25.837 IST: %STACKMGR-4-SWITCH_REMOVED: Switch 2 has been REMOVED from the stack
Apr 9 02:36:27.850 IST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/1, changed state to down
Apr 9 02:36:27.850 IST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/3, changed state to down
Apr 9 02:36:27.850 IST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/4, changed state to down
Apr 9 02:36:27.850 IST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/5, changed state to down
Apr 9 02:36:28.857 IST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/1, changed state to down
Apr 9 02:36:28.857 IST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/3, changed state to down
Apr 9 02:36:28.857 IST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/4, changed state to down
Apr 9 02:36:28.857 IST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/5, changed state to down
Apr 9 02:48:37.111 IST: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state UP
Apr 9 02:49:08.048 IST: %STACKMGR-4-SWITCH_ADDED: Switch 2 has been ADDED to the stack
Apr 9 02:49:20.170 IST: %STACKMGR-5-SWITCH_READY: Switch 2 is READY
Apr 9 02:49:20.170 IST: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 2 has changed to state DOWN
Apr 9 02:49:20.170 IST: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 2 has changed to state UP
*Mar 1 00:01:02.738: %STACKMGR-4-SWITCH_ADDED: Switch 1 has been ADDED to the stack (Switch-2)
*Mar 1 00:01:02.738: %STACKMGR-4-SWITCH_ADDED: Switch 2 has been ADDED to the stack (Switch-2)
*Mar 1 00:01:07.024: %SPANTREE-5-EXTENDED_SYSID: Extended SysId enabled for type vlan (Switch-2)
*Apr 9 02:49:18.979 IST: %SYS-6-CLOCKUPDATE: System clock has been updated from 21:19:18 UTC Wed Apr 8 2015 to 02:49:18 IST Thu Apr 9 2015, configured from console by console. (Cochin-GMSC-SWTCH-2)
*Apr 9 02:49:19.382 IST: %SYS-5-CONFIG_I: Configured from memory by console (Cochin-GMSC-SWTCH-2)
*Apr 9 02:49:19.482 IST: %STACKMGR-5-SWITCH_READY: Switch 1 is READY (Cochin-GMSC-SWTCH-2)
*Apr 9 02:49:19.818 IST: %STACKMGR-5-MASTER_READY: Master Switch 1 is READY (Cochin-GMSC-SWTCH-2)
*Apr 9 02:49:20.053 IST: %STACKMGR-5-SWITCH_READY: Switch 2 is READY (Cochin-GMSC-SWTCH-2)
*Apr 9 02:49:20.178 IST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback99, changed state to up (Cochin-GMSC-SWTCH-2)
*Apr 9 02:49:20.178 IST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback999, changed state to up (Cochin-GMSC-SWTCH-2)
*Apr 9 02:49:20.321 IST: %SYS-5-RESTART: System restarted -- (Cochin-GMSC-SWTCH-2)
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(44)SE2, RELEASE SOFTWARE (fc2) (Cochin-GMSC-SWTCH-2)
Copyright (c) 1986-2008 by Cisco Systems, Inc. (Cochin-GMSC-SWTCH-2)
Compiled Thu 01-May-08 15:00 by antonino (Cochin-GMSC-SWTCH-2)
Apr 9 02:49:24.222 IST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/1, changed state to up
Apr 9 02:49:24.264 IST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/3, changed state to up
Apr 9 02:49:24.281 IST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/4, changed state to up
Apr 9 02:49:24.314 IST: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/5, changed state to up
Apr 9 02:49:25.228 IST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/1, changed state to up
Apr 9 02:49:25.270 IST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/3, changed state to up
Apr 9 02:49:25.287 IST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/4, changed state to up
Apr 9 02:49:25.321 IST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/5, changed state to up
Apr 9 02:49:39.959 IST: %PLATFORM-6-MODULE_INSERTED: TwinGig Converter module inserted in slot 1 in Switch 2 (Cochin-GMSC-SWTCH-2)
Apr 9 02:49:42.106 IST: %PLATFORM-6-MODULE_INSERTED: TwinGig Converter module inserted in slot 2 in Switch 2 (Cochin-GMSC-SWTCH-2)
Switch 02
Switch Uptime : 5 hours, 38 minutes
Base ethernet MAC Address : 00:23:04:19:9A:00
Motherboard assembly number : 73-10313-11
Motherboard serial number : FDO12320AH4
Model revision number : A0
Motherboard revision number : A0
Model number : WS-C3750E-24TD-SD
Daughterboard assembly number : 800-28590-01
Daughterboard serial number : FDO123305QU
System serial number : FDO1234V07K
Top assembly part number : 800-28443-01
Top assembly revision number : A0
Version ID : V01
CLEI Code Number : COMVC00ARA
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(44)SE2, RELEASE SOFTWARE (fc2)
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Thu 01-May-08 15:00 by antonino
Image text-base: 0x00003000, data-base: 0x02000000
Please help to find reason behind this unexpected reboot.
Regards
Jatinderwhat is use of session 2 command ,is this service impacting command
sh ver
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(44)SE2, RELEASE SOFTWARE (fc2)
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Thu 01-May-08 15:00 by antonino
Image text-base: 0x00003000, data-base: 0x02000000
ROM: Bootstrap program is C3750E boot loader
BOOTLDR: C3750E Boot Loader (C3750E-HBOOT-M) Version 12.2(35r)SE1, RELEASE SOFTWARE (fc2)
******* uptime is 11 weeks, 2 days, 8 hours, 40 minutes
System returned to ROM by power-on
System restarted at 01:41:48 IST Wed Jan 21 2015
System image file is "flash:c3750e-universalk9-mz.122-44.SE2/c3750e-universalk9-mz.122-44.SE2.bin"
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
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agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
[email protected].
License Level: ipbase
License Type: Permanent
Next reload license Level: ipbase
cisco WS-C3750E-24TD (PowerPC405) processor (revision A0) with 0K/16376K bytes of memory.
Processor board ID FDO1234V07J
Last reset from power-on
3 Virtual Ethernet interfaces
1 FastEthernet interface
56 Gigabit Ethernet interfaces
4 Ten Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.
512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : 00:22:BE:95:35:80
Motherboard assembly number : 73-10313-11
Motherboard serial number : FDO12340H8F
Model revision number : A0
Motherboard revision number : A0
Model number : WS-C3750E-24TD-SD
Daughterboard assembly number : 800-28590-01
Daughterboard serial number : FDO123305LA
System serial number : FDO1234V07J
Top Assembly Part Number : 800-28443-01
Top Assembly Revision Number : A0
Version ID : V01
CLEI Code Number : COMVC00ARA
Hardware Board Revision Number : 0x01
Switch Ports Model SW Version SW Image
* 1 30 WS-C3750E-24TD 12.2(44)SE2 C3750E-UNIVERSALK9-M
2 30 WS-C3750E-24TD 12.2(44)SE2 C3750E-UNIVERSALK9-M
Switch 02
Switch Uptime : 1 day, 7 hours, 35 minutes
Base ethernet MAC Address : 00:23:04:19:9A:00
Motherboard assembly number : 73-10313-11
Motherboard serial number : FDO12320AH4
Model revision number : A0
Motherboard revision number : A0
Model number : WS-C3750E-24TD-SD
Daughterboard assembly number : 800-28590-01
Daughterboard serial number : FDO123305QU
System serial number : FDO1234V07K
Top assembly part number : 800-28443-01
Top assembly revision number : A0
Version ID : V01
CLEI Code Number : COMVC00ARA
License Level : ipbase
License Type : Permanent
Next reboot licensing Level : ipbase
Configuration register is 0xF -
2960x - stack cables connected while switches power on. SFP ports - status unknown
Connected 2960x uplink using SFP ports both stacks and all 4 ports worked good.
Remote tech connected last stack cable between first and last switch, in 2 different 2960x stacks of switches, while switches were powered on. A longer stack cable was needed. 3 of 4 SFP ports did stopped communicating.
One stack SFP stayed up in switch 2, not master. Completed reload - other SPF connected in switch 4/0/52
Second stack no connection on either SFP, remote tech power cycled switches.
After power cycle one SFP worked in Master 1/0/52, other switches SFP ports show "unknown" when inserting SFP.
Configured port 48 on stack with issue and connected second uplink just fine.
Has anyone experienced this with the SFP's?
- GLC-T P/N 30-1410-03
Looking for documentation on reccommending procedure for connecting stack cables while switches should be powered off or not.
Thanks,Opened Cisco TAC case. the following bug was found.
the two different HBRN's below require 2 different IOS and they cannot be in same stack.
https://tools.cisco.com/bugsearch/bug/CSCur56395
switch#sh ver | s Hardware Board
Hardware Board Revision Number : 0x05
switch#remote command 2 sh ver | s Hardware Board
Switch : 2 :------------ Hardware Board Revision Number : 0x05
switch#remote command 3 sh ver | s Hardware Board
Switch : 3 : ------------ Hardware Board Revision Number : 0x12
switch#remote command 4 sh ver | s Hardware Board
Switch : 4 :------------Hardware Board Revision Number : 0x12
From Cisco.
Developers have recommended to upgrade the IOS version of switches with a Hardware Board revision Number below 0x10 to the release 15.0(2.0).EX5ES. this is the one attached to this email and should be applied to switch 1 and 2.
For switches with a Hardware Board revision Number above 0x10 to the release 152-2.4.E1ES, which I will send you right away. This should be done on switch 3 and 4.
Now, If you load the engineering special, you will need to do a full power-cycle (physically unplug the power and plug it back in for every single switch). A simple ‘reload’ will not resolve this.
The same must be done on Switch-0. For this stack you will only need to load the image attached to this email since all the Hardware Board revision Numbers are lower than 0x10.
done. -
Is anyone aware of a bug in version 15.0(2)EX5 for 2960X Switches that would cause a switch in the master role to stop linking in new ports in green (and passing traffic). I have 2 2960X-48FPD-L Switches in a stack and whichever switch I designate master will only link new connections in orange and not pass traffic. All ports linked in show up/up and can be seen in a show cdp neighbor but won't pass any other traffic.
If I unplug the Stacking cables both switches become masters and ports linked in green on the previous member switch stay green, but after it switches to master any new connections plugged in only link in orange.
If I switch priorities and reboot the problem switches to the new master switch and the problem goes away on the member switch.
Also, a switch in the master role does not show any spanning tree instances for ports in the orange link state.
Has anyone seen this issue and do you know of a solution?
JimA quick update for those with this same problem.
1. 15.2(3)E turned out to be very unstable causing my switch stack to randomly lockup/reboot one of the switches about once a week.
2. I downgraded back to 15.0(2)EX5 but found a workaround. It turns out the switch stack with the 15.0 versions does not like the switchport voice vlan command on any of the interfaces on the master switch. I simply removed the voice vlan configuration on the interfaces and all the switch ports linked in just fine. I would prefer to run the phones on a voice vlan, but it still works without, just the PC's and phones are on the same vlan.
Jim -
Ipbase to IP service License upgrade stack switches
All
switch part number # WS-C3750X-48P-S
current License Level: ipbase
switch currently connected as a stack with three switches
I am planning to install license to make existing switch IP base to full L3 functionality that is IP services , just to make sure that I need to install license in all the switches I think yes ??, also would like to check while upgrading licensee
I need to break the existing stack , install licenese reload and connect again stack ?? or without breaking stack copy lic each switch flash and load once , since it is production switch bit concern .
Regards
LernerIt seems that you should be able to download license to all the members and then from the master send command to make them boot with the new license. Don't forget to accept the EULA.
https://supportforums.cisco.com/message/3345903
Daniel Dib
CCIE #37149 -
Use SNMP to monitor the power supply status of stacked switches
Does anybody know how to use SNMP to monitor the status of the internal power supplies of a group of stacked Cisco 3750 switches?
The switch stack has three 3750-48PS-E switches inter-connected by Cisco StackWise cable. IOS ver 12.1(19)EAlc. A single IP address is used to identify the switch stack. Every time I poll the OID chassisPs1Status (1.3.6.1.4.1.9.5.1.2.4.0 in CISCO-STACK-MIB), I only got the status for the Master switch of the switch stack. Is there any way to poll the power supply status of other switches in the switch stack?
Thanks a lot!Sorry to refresh such an old topic - but I am stuck with exactly this: Monitoring power supplies of a stacked Cisco Catalyst 3750-E.
I'm using the exact same OID's as described, but the problem is, the information shown on the SNMP output is not correct.
This morning, a power supply of the first switch failed and switched to RPS. Here the information I got on SNMP:
snmpwalk -v 2c -c public 192.168.1.50 1.3.6.1.4.1.9.9.13.1
SNMPv2-SMI::enterprises.9.9.13.1.1.0 = INTEGER: 13
SNMPv2-SMI::enterprises.9.9.13.1.3.1.2.1006 = STRING: "SW#1, Sensor#1, GREEN "
SNMPv2-SMI::enterprises.9.9.13.1.3.1.2.2006 = STRING: "SW#2, Sensor#1, GREEN "
SNMPv2-SMI::enterprises.9.9.13.1.3.1.3.1006 = Gauge32: 41
SNMPv2-SMI::enterprises.9.9.13.1.3.1.3.2006 = Gauge32: 40
SNMPv2-SMI::enterprises.9.9.13.1.3.1.4.1006 = INTEGER: 59
SNMPv2-SMI::enterprises.9.9.13.1.3.1.4.2006 = INTEGER: 59
SNMPv2-SMI::enterprises.9.9.13.1.3.1.5.1006 = INTEGER: 0
SNMPv2-SMI::enterprises.9.9.13.1.3.1.5.2006 = INTEGER: 0
SNMPv2-SMI::enterprises.9.9.13.1.3.1.6.1006 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.3.1.6.2006 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.4.1.2.1060 = STRING: "Switch#1, Fan#1"
SNMPv2-SMI::enterprises.9.9.13.1.4.1.2.2059 = STRING: "Switch#2, Fan#1"
SNMPv2-SMI::enterprises.9.9.13.1.4.1.3.1060 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.4.1.3.2059 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.5.1.2.1059 = STRING: "Sw1, PS1 Normal, RPS NotExist"
SNMPv2-SMI::enterprises.9.9.13.1.5.1.2.2060 = STRING: "Sw2, PS1 Normal, RPS NotExist"
SNMPv2-SMI::enterprises.9.9.13.1.5.1.3.1059 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.5.1.3.2060 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.5.1.4.1059 = INTEGER: 2
SNMPv2-SMI::enterprises.9.9.13.1.5.1.4.2060 = INTEGER: 2
As you see, both PS1 (for both switches) are appearing normal. It doesn't even recognize RPS:
SNMPv2-SMI::enterprises.9.9.13.1.5.1.2.1059 = STRING: "Sw1, PS1 Normal, RPS NotExist"
SNMPv2-SMI::enterprises.9.9.13.1.5.1.2.2060 = STRING: "Sw2, PS1 Normal, RPS NotExist"
The first switch's power supply died and now the cable is disconnected. LED's of the power supply are out. And still: The switch happily announces by SNMP it's power supplies are up.
Is this a known bug? If yes, has it been fixed?
Model WS-C3750E-48TD
Firmware 12.2(37)SE1
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What is a stacked switch?
Hi,
Can anyone explain what is a stacked switch and what kind of switches can be stacked and why the switched need to be stacked and how they work.
Any links that I can go through to get the details.
Thanks in Advance,
ShyamHi
When you talk about stacking the cisco switches, there are two techniques
gigastack :- In this you connect all the switches uplink with gigabit stack GBIC.
guru prasad has given one cisco url for that.
and all the switches that support stackwise technology are now end of sale.
stackwise and stackwise plus :-
Cisco StackWise technology unites up to nine individual Cisco Catalyst 3750 switches into a single logical unit, using special stack interconnect cables and stacking software. The stack behaves as a single switching unit that is managed by a master switch elected from one of the member switches. The master switch automatically creates and updates all the switching and optional routing tables. A working stack can accept new members or delete old ones without service interruption.
http://www.cisco.com/en/US/products/hw/switches/ps5023/products_white_paper09186a00801b096a.shtml
now we can say that we have only one stacking option available that is of stackwise as all model which supported gigstack are now end os sale.
HTH
rate if it helped
rgds
rajat -
How to telnet to one of the switches in a 3725 stack?
Hi,
I have this stack of 3 x 3725 switches. When I set up the stack, I configure the master switch to have a certain IP address. I can telnet to this IP address no problem.
However, what should I do if I want to telnet to the other slave switches?
Can I do something like "telnet x.x.x.x:2"?
Thanks in advance.Hi Blue,
You can access all or specific stack members by using the "remote command {all | stack-member-number}" privileged EXEC command. The stack member number range is 1 to 9.
You can access specific stack members by using the "session stack-member-number" privileged EXEC command. The stack member number range is 1 to 9. The stack member number is appended to the system prompt. For example, Switch-2# is the prompt in privileged EXEC mode for stack member 2, and the system prompt for the stack master is Switch. Enter exit to return to the CLI session on the stack master. Only the show and debug commands are available in a CLI session to a specific stack member.
This link may help you with some information to manage stack
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750/12220se/3750scg/swstack.htm#wp1044402
HTH, if yes please rate the post.
Ankur -
Adding a 3850 to make a switch stack.
Hi all,
I would like to get opinions on how to setup a new 3850 to make it work in a stack. I will be replacing a 3550 in production with a new 3850. This is what I have:
Switch 1: 3850 [ws-c3850-24p] Lan base
Switch Ports Model SW Version SW Image Mode
1 32 WS-C3850-24P 03.02.02.SE cat3k_caa-universalk9 BUNDLE
Switch 2: 3550 [ws-c3550-24-pwr]
C3550 Software (C3550-I5Q3L2-M), Version 12.1(22)EA8a, RELEASE SOFTWARE (fc1)
New switch: 3850 [ws-c3850-24p] Lan base
Switch Ports Model SW Version SW Image Mode
* 1 32 WS-C3850-24P 03.03.01SE cat3k_caa-universalk9 INSTALL
My goal is to pre-configure the new switch with the info from the 3550, send the switch to the site, and be able to make it work in a stack with the 3850 under production.
My thoughts:
- Change SW 1 priority to 15
- Change New switch priority to 12
- On SW 1: #switch 2 provision ws-c3850-24p
- On SW 1: configure switch 2 interfaces to match SW 2 after introducing the command above
- Upgrade IOS on SW 1 to match New switch
- Connect stack cables (New switch power OFF)
- Power ON New switch
- Get a drink
I did a #switch 1 renumber 2 on the New switch, but it didn't chage the switch number.
Will this work? Or should I
- Change SW 1 priority to 15
- Change New switch priority to 12
- On New switch: configure interfaces to match SW 2
- Upgrade IOS on SW 1 to match New switch
- Connect stack cables (New switch power OFF)
- Power ON New switch
- Get a drink
Regards,
GOk.. The new switch is pretty good. its running the recommended IOS-XE version(3.3.1) and is in recommended mode (Install).
1st you need to change the mode to "install" mode in the old switch and upgrade the IOS to 3.3.1.
this doc will help you.
https://supportforums.cisco.com/docs/DOC-39667
1. switch number will take effect once after the reload.
this will definately work.
- Upgrade IOS on SW 1 to match New switch
- Change SW 1 priority to 15
- Connect stack cables (New switch power OFF)
- Power ON New switch
- On SW 1: #switch 2 provision ws-c3850-24p
- On SW 1: configure switch 2 interfaces to match SW 2 after introducing the command above
- Get a drink
- update me in this thread. -
Switch stack for a Cisco 3750x
I have the stack working and provisioned and it shows Gi1/0/1-48 for switch 1 and Gi2/0/1-48 for switch 2. My question is how can i reprovision the stack to make switch 2 be Gi1/0/1-48 and switch 1 be Gi2/0/1-48?
You need to pull the stack apart, renumber each stack member and reboot all the units.
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