Cisco Switching/Routing :: CPU Spikes On 3750X Stack

Mar 7, 2013

This 3750X stack (3 members) has some 100% cpu spikes. Is this bad enough to start tracking down the cause(s) or is this somewhat typical and not a reason for concern? I just took this reading. How can you detemine when the 100% and 80% spikes occurred? 
 
 2222233333333332222222222444442222222223333322222222222222
7777733333333338888888888000007777777770000077777888887777
100     

[Code].....

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Cisco Switching/Routing :: Configuring Stack-power On A 3750X Stack?

Oct 31, 2012

I have 3 switches in my 3750 X stack. I am getting the following error in the logs:  %PLATFORM_STACKPOWER-4-PRIO_CONFLICT: Switch 1's power stack has conflicting power priorities.  Not sure what I should do next. Below is my Stack-power configuration:
 
Power stack name: Powerstack-1    Stack mode: Power sharing    Stack topology: Ring    Switch 1:        Power budget: 735        Low port priority value: 20        High port priority value: 10        Switch priority value: 2        Port 1 status: Connected        Port 2 status: Connected        Neighbor on port 1: c464.1308.7900        Neighbor on port 2: e8b7.4827.e680
    Switch 3:        Power budget: 729        Low port priority value: 22        High port priority value: 13        Switch priority value: 4        Port 1 status: Connected        Port 2 status: Connected        Neighbor on port 1: 2894.0fd9.9f00        Neighbor on port 2: 2894.0fd8.e200
    Switch 2:        Power budget: 690        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: 2894.0fd8.e200        Neighbor on port 2: c464.1308.7900
 
Each switch has its own 715W power supply in it and all check out OK.

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Cisco Switching/Routing :: QoS On 3750X Stack

May 7, 2013

I'm trying to review a QoS setup, and I'd like to make sure I fully understand the current setup before I change anything. I'm seeing output drops on two different queue-thresholds, but not sure how packets are making it to one of the queues.
 
Switch Version
CORE#show ver
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 15.0(2)SE, RELEASE SOFTWARE (fc1)
System image file is "flash:/c3750e-universalk9-mz.150-2.SE/c3750e-universalk9-mz.150-2.SE.bin"
cisco WS-C3750X-24 (PowerPC405) processor (revision A0) with 262144K bytes of memory.
Switch Ports Model              SW Version(code)

I can find queue4-threshold3 in the mappings, but how are packets getting mapped to queue2-threshold1? The priority queue is disabled for this interface, so I'm not sure how this queue is dropping packets, according to the maps nothing is mapped to 02-01.

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Cisco Switching/Routing :: Multicast In A 3750x Stack

Jan 31, 2012

I recently created a stack using (2) 3750x switches. I have three vlans on the stack (1,105,241) Vlan 105 is configured on 6509 core switches with multicasting and are connected to the stack via gigabit fiber. It is working well with clients on the Master or SW1, however clients on SW2 do not participate in multicasting Any client pc that is connected to SW2 vlan 105 does not show up in the "sh ip igmp snooping group" command. I can statically assign a client on SW2 to the mcast groups but but they fail to register on their own. I can take the cable connection from SW2 and plug it into an SW1 Vlan 105 port and it immediately becomes a member of the groups. I can then connect it back to the SW2 port and it disappears from the group membership. IGMP and PIM are configured with the defaults.

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Cisco Switching/Routing :: Is It Possible To Stack A 3750G And 3750X

May 26, 2011

I have a 3750G and bought a new 3750X.  It possible to stack these two together?

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Cisco Switching/Routing :: 3750X Stack High CPU?

Dec 3, 2012

Seeing very high CPU on one of our 3750X stacks.  Usally its around 30% but recently its 70, 80, 90 or maxed at 100% during the main day.IOS version c3750e-universalk9-mz.122-55.SE1.bin.Has a ten gig uplink connected to a nexus 7k and another ten gig connected to another 7k.  Running Layer 3 and EIGRP on the 3750X.Is this normal for the CPU?

#sh processes cpu history                
    5555555554444455555555555555588888666669999888885555577777
    8888000001111111111222227777755555666662222222229999977777
100
90                              *****     ****
80                              *****     *********     *****

[code]....

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Cisco Switching/Routing :: Upgrading A 3750x Stack IOS?

Dec 3, 2012

way to upgrade the IOS in my stack on 4 3750x switches

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Cisco Switching/Routing :: SH INVENT On Stack 3750X-24P-S

Dec 4, 2012

I have a stack of three 3750X-24P-S switches. Each switch has two PSU's.If I do a SH INVENT, switch 2 only lists Power Supply 0
 
If, however I do a SESS 2 onto the second switch in the stack and then do a SH INVENT, it shows both power supplies. Is it anything to be concerned about?

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Cisco Switching/Routing :: Power Supplies In Stack With 3750X

Mar 12, 2012

I have two WS-C3750X-48PF-S in stack, but every one has just one power supply. In the package of the switches is included one stack power supply cable.does it make sense to use stack power cable if every switch has just one power supply ??

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Cisco Switching/Routing :: Rolling Stack Upgrade (RSU) With 3750X (IOS 15.0.1-SE3)?

Jun 17, 2012

Switch 2 has an interface configured in RSU Standby.Switch 3 has an interface configured in RSU active. The upgrading sequence is : Switch 2, Switch 1, Switch3.The aim of the test is to prove that there is no loss of IP connectivity throught the RSU process.During the RSU process, there are ping between all the computers.
 
IOS starting version : 15.0-1.SE3
IOS upgrading version (with OVERWRITE) : 15.0-1.SE3 (same version)
 
1rst step : Switch 2 reboot and come back master but isolated from original stack (switch 1 and 3)
 
2nd step : Switch 1 reboot, and come back with switch 2 into the upgrading stack.

Issue : at this step :

-  Switch 1 put its interface (IP 192.168.5.254) up :

-  Switch 3 has not reboot and still has its interface (IP 192.168.5.254) up

=> we have some OSPF adjencies and mac flapping issues : switch 1 and 3 are trying to mount there OSPF adjencies on the same IP. We loss our IP connectivity since step 3 is not over.
 
3rd step : Switch 3 reboot and come back up in the upgrading stack. The IP connectivity is back, and the RSU process is done.Is that a normal behaviour ?How can we avoid to loose IP connectivity during RSU process ?

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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 :: 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 :: 3750X Stack Upgrade Failure

Jan 24, 2013

IOS upgrade tried on the stack of 2XWS-C3750X-24T-S , Upgrade was tried to support WCCP on the platform. Current version is Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(58)SE1, Not able  find any IP Plus ios in the site ? Only available are IP base and Universal K9 , Tried upgrading to c3750e-universalk9-tar.122-58.SE2.tar by using stack upgrade method as per document [URL]
 
Upgrade fails with error :
 
%Error opening flash:update/info (No such file or directory)
ERROR: Image is not a valid IOS image archive.
 
Why current ios is not supporting WCCP , I hope it is there in the featureset. ( tried "sdm prefer routing" but no success) Does c3750e-universalk9-tar.122-58.SE2.tar will give me wccp support ? What is the issue with my upgrade and how do I do a successfull upgrade ?

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Cisco Switching/Routing :: High CPU Usage - 3750X Stack

Jun 19, 2012

We recently configured a stack of four 48 port 3750-x switches . We are noticing high CPU usage. "Hulc LED process" seems pretty high. This has coincided with VMware servers getting slow and non-responsive at times, perhaps a coincidence, not sure. Below I provided some outputs about how to diagnose it.

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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 :: Stack 3750G-12S-S With 3750X-48T Switch?

Apr 14, 2012

if we can stack the 3750G switch with a 3750X switch ?

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

Jun 13, 2012

Our customer has a stack of 6 3750G switches.  They want to add another switch to the stack.  I tried to quote another G, but I got a warning that the G series is EOS January 30,2013.  Can I add a 3750X to the stack?  I know that no matter what switch I get, I will have to upgrade the IOS in the stack, as the stack is running 12.2(25)SEE2. 

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Cisco Switching/Routing :: 3750X - Single Switch Stack?

Mar 8, 2012

I have a 3750X 24 port switch (with NM-1G network module) running IOS 15.0(1). Is there any benefit or reason to plug in the included Stack Wise cable and loop it back to itself in a single switch installation?
 
I don't see any recommendation in the documentation. The data sheet indicates a single switch is a non-blocking device so I'd think there's no bandwidth advantage like there is when connecting an actual multi-switch stack and needing to close the loop for the full 32 Gbps stack bandwidth.

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Cisco Switching/Routing :: Difference Between Stack 3750G And 3750X?

Jul 15, 2012

I have a cisco WS-C3750G-24TS with IOS flash :/ c3750-mz.122-ipservicesk9-25.SEB4.bin "
 
I purchased a new Cisco WS-C3750X-24 with the IOS flash :/ c3750e-universalk9-mz.150-1.SE/c3750e-universalk9-mz.150-1.SE.bin. ( NEW )
  
When i configured a stack between the two 3750,  the new switch restarted due the version mismatch (different IOS´s);
 
 We have two versions: 
 
WS-C3750G-24TS-ipservicesk9 flash :/ c3750-mz.122-25.SEB4.bin "
  
VS
 
WS-C3750X-24 flash :/ c3750e-universalk9-mz.150-1.SE/c3750e-universalk9-mz.150-1.SE.bin.
  
Is that possible to configure a stack between then?
 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Tenho  um cisco WS-C3750G-24TS com o IOS flash:/c3750-ipservicesk9-mz.1
22-25.SEB4.bin"
Adquiri  um novo cisco WS-C3750X-24 com o IOS flash:/c3750e-universalk9-mz.150-1.SE/c3750e-universalk9-mz.150-1.SE.bin.

[code]...

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Cisco Switching/Routing :: Replacing 3750X Stack Member?

Feb 7, 2012

I have two 3750X in a stack. Each 3750X has one 10Gb uplink to primary core1 and one 1Gb uplink to backup core2 configured in 2 etherchannel groups. The member switch has bad ports, so I need to replace it. I have spare 3750X unit. Is it possible to connect the spare unit to the stack and then move the RJ-45 cables from the member with bad ports to the new member? That way I can minimize servers downtime to just a few seconds..If that would work, then the last step would be to move the 10Gb networking module from old member to the new one, as well as the secondary PSU. Is it doable? Also according to the documentation, all I need to add new member is matching IOS version, correct?

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Cisco Switching/Routing :: Dual Stack HSRP On 3750X?

Jan 10, 2013

I would just like to confirm whether dual stack hsrp is possible or not on 3750X both stack and non-stack.
 
The following is that I have to take care of this on the stack?
 
[Catalyst 3750 Software Configuration Guide, Release 12.2(55)SE]

[URL]
 
%FHRP group not consistent with already configured groups on the switch stack

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Cisco Switching/Routing :: 3750x Replacing 2nd Stack Wise Cable?

Nov 20, 2011

I have two 3750G switches stacked together however it's not in a full ring configuration:

Stack Ring Speed        : 16G
Stack Ring Configuration: Half
Stack Ring Protocol     : StackWise
 
And as shown below it's obvious which cable is not working:
 
show switch neighbors
Switch #    Port 1       Port 2
--------    ------       ------
1         2            None
2        None           1
 
It's not flapping - it's like the cable isn't there at all. I'm going to try reseating the cable in there and perhaps an all out replacement if necessary. My question - is there any threat of a reboot of the switch stack or of partitioning of the switch stack by trying to get the 2nd cable working?

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Cisco Switching/Routing :: High Utilization On 3750x Switch Stack?

Feb 25, 2013

i am seeing very high utilization on a random basis on the stack. and the logs indicate me that there is a pattern where there is a stack power cable shows inserted (which was never unplugged) followed by sudden spike in the utilization.
 
001018: *Mar  6 16:21:22.138: %PLATFORM_STACKPOWER-6-CABLE_EVENT: Switch 4 stack power cable 1 inserted
001019: *Mar  6 18:18:37.982: %SYS-1-CPURISINGTHRESHOLD: Threshold: Total CPU

[Code]......

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Cisco Switching/Routing :: Can't Connect To Console On 3750X Stack Members

Oct 23, 2012

I have a 3750X stack of 6 switches, I have a terminal server console server plugged into the console ports of all 6 switches. I am having a strange issue where I can connect to the master via the console, get a login prompt then I can log in, but when I try and connect to any of the members then I get a prompt "Press RETURN to get started" When I push return, it just loops back to the same prompt again:
 
switch-6 con0 is now available
Press RETURN to get started.
 
switch-6 con0 is now available
Press RETURN to get started.
 
I can connect to the stack via SSH fine etc. I am running 15.0(1)SE2. The stack is configured for TACACS+ auth via Cisco ACS.
 
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
*1       Master f0f7.55ba.2700     15     1       Ready              
2       Member f0f7.5541.da00     14     1       Ready              
3       Member a493.4c1e.4b80     13     1       Ready              
4       Member f0f7.5585.cb80     12     1       Ready              
5       Member a44c.1120.8e80     11     1       Ready              
6       Member a493.4cc0.fa80     10     1       Ready     

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Cisco Switching/Routing :: 3750X Stack Power Limitation With Non-POE Switch?

Oct 28, 2012

We have 9 x 3750x switches with 5-nonPOE and 5-POE. There is a limitation with 4 POE per stack with Stack Power.
 
Can we combine all 9 to one stack since there are only 4 POE?
 
Or, is the 4-switch limitation applied regardless if they are mixed with POE and non-POE?

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Cisco Switching/Routing :: 3750X Rolling Stack Upgrade / Update

Mar 19, 2013

This feature doesn't work as advertised on the Release Notes and other documentation.  After 12 hrs of lab work and a tlwo day support call to TAC, they finally came back to me that:
 
  IOS Upgrade works well if you use the command force-reload, without force-reload, it won't work.  --"of course with this command the complete stack will go down and the purpose of RSU will not serve"   
 
Then they pointed me to a bug that I could not find in the bug tracker unless I searched by the bug ID number ??   CSCua78897
 
Unfortunately this bug has a closed status and is not slated to be fixed ? 

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Cisco Switching/Routing :: 3750X Stack Auto Vs Manual Upgrade

May 8, 2013

Are there issues with the auto upgrade feature for 3750X stacks, either historically or currently?
 
Some people prefer to upgrade switch stacks manually by disconnectiong the stack cables and uprading code on each switch. 
 
I've done the manual procedure in the past and have not tried the auto upgrade (I have the procedure for the auto upgrade).

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Cisco Switching/Routing :: What Are Options Available To Add Cat3560 G Switch To Stack Of 3750x Switches

Sep 8, 2012

What are the options avilable to add a cat3560 g switch  to a stack of 3750x switches.?is there a connector avilable ?or is it possible to trunk via fiber ? cat 3560 has 4 sfps and 224 10/100/1000 ports with poe. cat 3750 stack has a 10 gb up link . What are the possible options?

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Cisco Switching/Routing :: Upgrading Firmware On Mixed 3750G And 3750X Stack

Jul 3, 2012

I've got a mixed stack as follows:

Switch 1 - 3750X-24P
Switch 2 - 3750G-24TS
Switch 3 - 3750G-24T
 
Running 12.2(53)SE2, IP base.  Now I tried upgrading the firmware on the entire stack to 12.2(55)SE4 and ran into this error:(Command: archive download-sw /imageonly /overwrite /allow-feature-upgrade tftp://10.20.20.13/c3750e-universalk9-tar.122-55.SE4.tar)
 
 Error: The image in the archive which would to used to upgade system number 2 does not support that system type.I haven't as yet removed the "3750G-24TS" switch from the stack and re-tried as yet, however, is the expectation that without the 24TS, the upgrade should work?

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Cisco Switching/Routing :: TCAM Write Failure Message On 3750x Stack

May 29, 2013

I have a stack of 3750x switches running 15.0 (2) SE2 IOS.   When I reload the switch stack, I am seeing the following message in the logs: IPv6 user port trust TCAM write failed.

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Cisco Switching/Routing :: 3750x Stack - LACP Waiting To Be Aggregated Takes Too Long

Oct 26, 2012

I have configured a portchannel with 3 ports - lacp active mode I want to pxe boot esx server with Hp Proliant DL 360 G7.
 
During Pxe Boot the physical Interfaces must be in (I) state - standalone.
 
The server receives via dhcp the ip but after getting the ip the link goes down for a short time and the switchport goes down and then in (w) state - waiting to be aggregated. Now the server tries to load via tftp the image but the server gets a timeout because the switchport is in state (w). It takes a long time til the switchport comes back in standalone mode (I).
 
Is it possible to modify the time how long the switchport is in the waiting to be aggregated state on 3750x ?
 
Would the right command be lacp rate-fast? But this command is not available on 3750x, only 6000 series.

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Cisco Switching/Routing :: Stack 3750X - How To Configure Port Channel To Aggregate Two Links

Feb 18, 2013

I have two stacks 3750X on two different sites with two links L_2_L, and I want to configure the port channel to aggregate the two links.
 
Site A                                                                                                  Site B
3750X -A1 --------------------------------------(          )--------------------------------------- 3750X -B1
                                                      (  L-2-L )
3750X -A2 --------------------------------------(          )--------------------------------------- 3750X -B2

Below the configuration that I have put the two stacks.
 
site A
interface Port-channel5
description Etherchannel group entre le stack 3750X-A et Switch Lan_2_Lan
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 11,12,999
switchport mode trunk
switchport nonegotiate
speed 100
 
But the problem is only one link is Bundeled in channel group, see below

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
5      Po5(SU)         LACP      Gi1/0/15(I) Gi2/0/15(P)

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Cisco Switching/Routing :: 3750x Stack - EIGRP Stub With Non-stub Neighbors

Sep 16, 2012

we have 5 sites connected with a combination of direct fiber and Service Provider Ethernet. The equipmet consists of 3750 stacks with IP Services. Currently each site runs full EIGRP and is a EIGRP neightbor to all the other sites. Everything is working fine right now.
 
We would like to upgrade the R5 site to a 3750x stack with IP Base (cheaper than IP Services) and configure it as EIGRP Stub. My concern is with the following statement in the IOS command reference guide. 

Note Multi-access interfaces, such as ATM, Ethernet, Frame Relay, ISDN PRI, and X.25, are supported by the EIGRP Stub Routing feature only when all routers on that interface, except the hub, are configured as stub routers.   

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