Re: Cat 3750 Stack Management

Hello,
I am building a few 3750 stacks with three or more units, I want to be able to poll/monitor each individual switch in the stack but as it only has 1 ip associated with the stack, how can I do this? I am blind to a switch going down in the middle of the stack. I saw this in a four-year-old forum, but I say no specific resolution.

All stack management happens through the commander. The stack looks like a huge switch. If you want to monitor a specific switch's interfaces you can. They will be numbered as *EthernetX/0/Y, where X is the stack member number and Y is the interface number. CPU utilization can only be monitored on the active stack master, though. Inventory can be obtained from each stack member using ENTITY-MIB. Environmental data can be obtained for each switch using the CISCO-ENVMON-MIB.

Similar Messages

WLC 5508 LAG and CAt 3750 cross stack

Hello,
I would like to use the LAG feature on my 5508 WLCs and connect each of them to two different port of a 3750 stack using cross stack. Do you think it will work?
Cisco suggests not to connect different LAG ports of a WLC to different CAT3750 but it's not clear if it was referred to different standalone 3750s or to a stackwise of 3750s.
Tnks all
Johnny

The HA kicks in when the primary looses gateway, do a small test, keep a continuous ping to WLC from its gateway as source and break one of the link in the LAG and see if you drop any packet ?

Question Re: connecting 2960C switch to 3750 stack, max number of VLANS limit...

Hypothetical question: Let's suppose for example I've got a 3750 switch stack in a data center with over 300 VLANs defined on the 3750 stack, and that stack is also my VTP domain server. I wish to connect a small compact 2960C switch (which has a max limit of 255 VLIDs) as a VTP client to the 3750 stack's VTP domain and have the port at each end of this uplink connection set up to be an 802.1q trunk, but limit the VLIDs trunked to the 2960 to just a small handful (let's say just 3 or 4 vlans) via for example something like "switchport trunk allowed vlan 1,2,11,18" on the uplink port of the 2960C switch. Will the mere fact that there are hundreds of VLIDs present in the vlan configs on the 3750 stack confuse the little 2960C switch's max 255 vlans limits? Or will the 2960C with its "Lan Base" software happily show all 300+ vlans present in the parent switch stack in a "show vlan" command but simply only let you activate up to the 255 limit locally on that switch?
Normally I'd just use a 3560C switch with IP Base software for this purpose and not worry about any vlan max limit, but we're having to penny-pinch the project and save a few hundred dollars on this compact switch purchase and I've never used the 2960 family before. The small compact switch will be used to host a non-Cisco, 3rd party wireless LAN controller with several APs that will have a handful of different SSIDS, each on a separate vlan, and will not be located in the data center, but in another building connected by a fiberoptic link that will carry the "trunk".
EDIT: I found an old discussion thread where someone else was faced with a similar scenario, and he discovered that even with using "switchport trunk allowed..." and "switchport trunk pruning..." commands on the interfaces at both ends of the link, that the 2960 switch would still fall out of VTP client mode into transparent mode, which make you lose the benefit of having centralized management of a VTP domain. Seems the VTP protocol will always publish the full list of vlans from the server and this blows the mind of the small switches which drop into VTP transparent mode because they cannot handle all that many spanning tree sessions. Looks like the 2960 simply cannot be used in a high-vlan-density network if you wish to preserve central VTP domain management features. Rats.

The house network machine can browse and playback/stream video fine, however at the same time the machine on the wireless shows significant slowdown when browsing the web.
The issue is defiantly on the wireless side, If i plug a machine directly into the switch and assign it a static ip, i do not get slowdown, so this is happening before it reaches the poe switch.
So many factors affect the way to stream data up and down wireless. Sure, I have seen >40 clients on 802.11a AND 802.11b radio of a single 1140 AP. But this is not good. Why? Because wireless is a very "noisy" environment. When one talks, everyone else has to stop, listen and waits for their turn. The > 80 wireless clients connected to the 1140 AP had a detected maximum speed of 11 Mbps and they couldn't get any higher than that. They couldn't get any lower than 11 Mbps because I've disabled lower data rates.
You said you hard-code the channels to 1, 6 and 11 but what is the co-channel interferrence like in your wireless environment?

Does PI 1.3 alarms when a 3750 stack member goes down?

Hi
One 3750 stack member went down but the PI 1.3 did not shown any alarm.
Connecting CLI on the stack we see the status Provisioned on the failed member.
Is any way to detect this failure?
I think it should show some alarm like Card down pointing to the failed stack member.
Any help is appreciated

Unfortunately PI 1.3 does not supports stack member down situation. There was an enhancement for this :
CSCuh81366 : PI needs an event for the loss of a stack member
You need to move your PI to version 2.0 or higher to have better stack management from PI.
-Thanks
Vinod
**Encourage Contributors. RATE Them.**

Serial numbers on 3750 stacks

CW Contracts reporting reports the master SN. How can I pull all the SN for all devices in a 3750 stack for asset/inventory purposes?

kathegaj2 wrote:First, thanks to everyone that answered me, it feels effective when you get some kind of answer.So, nothing in reports that can assist with inventory-ing serial numbers for equipment rather than loopback management.I have built Netshow jobs that run sh ver | inc System serial and sh diag | inc PCB and in a large environment these are sloppy to parse.I checked also Contract Status and these also just apply to the master serial. Any other ideas?
You need to create a Custom Report Template in RME Reports.
- Association : don't pick anything
- Inventory Group : Chassis
- Attribute : Chassis Serial Number
- Operator : Contains
- Value : All
Click "Add", then "Save Changes", then Finish.
Then you use your custom report on a selection of device (using Report Generator, Inventory, pick your custom template), and you should be good to go. I then export it to CSV for further editing, sorting, etc.
HTH.
Alex.

Sg-300 - 3750 stack with SPANNING-TREE root problem.

Morning. I think ive configured a few hundred switches, maybe a thousand in my time, but never have a faced such horribleness that is the SG-300. After this week, I think ill refuse to touch them.
Got 2 voice vlans and running a few vrf's on a 3750 stack. but this discussion is about layer 2.
2 x 3750 stacked
1 x voice switch sg-300 company A voice vlan 18 - Po1 up to 3750 distributed etherchannel Po1 (LACP active both sides) 2 ports in channel
1 x voice switch sg-300 company B voice vlan 19 - Po1 up to 3750 distributed etherchannel Po2 (LACP active both sides) 2 ports in channel
Allowed vlans on both sides (command on Port-channel) are data A, Voice A, Mgt A to switch A
Allowed vlans on both sides (command on Port-channel) are data B, Voice B, Mgt B to switch B
It seems that these switches are limited to one voice vlan....
and that spanning tree BPDU's are ignored (or not recevied- havnt released the shark yet). let me explain.
originally when using "smart port" the switch with the lowest mac address, whatever Voice vlan was configured would take over the other switche's voice vlan, argh what a nightmare.
I gave up on the GUI as its far to complcated and have Almost got this working.
I am now using auto voice vlan, but have disabled smart macro. I hope that disabling smart macro stop other switches from learning the switch with the lowest mac address's voice vlan. So far so good - in the LAB. No where was it documented in the cli guide how do disable this stupid feature.
DHCP is working from scope on core, can mange the switches etc etc, access vlan voice vlan all good (after a monster battle).
Now I have an issue with spanning tree.
spanning tree priority for vlans 1-4094 on the 3750 is 4096.
spanning tree priority for vlans 1-4094 on the SG-300's is 6xxxx.
ALL switches think that they are the root. (well the "logical" 3 of them) The 3750's for all vlans, and the SG-300 for the one instance as it doesnt support per vlan. (I am not interested in trying MST here..this is not a datacentre)
On the 3750's Ive tried ieee, pvst, rpvst, while matching the non per-vlan equivalent on the SG series.
What is the difference between a General port and Trunk Port on a SG-300 specific to spanning tree, native vlans (when you can just configure an untagged vlan anyway!!) and what is the relevance to the way the bpdu's are carried?
And why the need for a PVID, when you can tell a port what is tagged and what isnt.
Does the trunk need Vlan1 to be explicitly allowed, and untagged? Does the Po trunk need to be a general port with PVID configured? in vlan 1?
I need to sort this, as cannot put an access switch into production that thinks it is the root of the tree. I wish I had a 2960.... a 3500XL..anything
Does anyone have CLI commands that can help here?

F.Y.I for catylyst heroes - here is the equivalent config for SG-300 - Vlan1 is required on the allowed list on the catylyst side (3xxx/4xxx/6xxx)
In this example:
VLANS - Voice on 188, data on 57, management on 56.
conf t
hostname XXX-VOICE-SWXX
no passwords complexity enable
username xxxx priv 15 password XXXXX
enable password xxxxxx
ip ssh server
ip telnet server
crypto key generate rsa
macro auto disabled
voice vlan state auto-enabled !(otherwise one switch controls your voice vlan….)
vlan 56,57,188
voice vlan id 188
int vlan 56
ip address 10.230.56.12 255.255.255.0
int vlan1
no ip add dhcp
ip default-gateway 10.230.56.1
interface range GE1 - 2
switchport mode trunk
channel-group 1 mode auto
int range fa1 - 24
switchport mode trunk
switchport trunk allowed vlan add 188
switchport trunk native vlan 57
qos advanced
qos advanced ports-trusted
exit
int Po1
switchport trunk allowed vlan add 56,57,188
switchport trunk native vlan 1
do sh interfaces switchport po1
!CATYLYST SIDE
!Must Explicitly allow VLan1, this is not normal for catalysts - or spanning tree will not work ! Even though it’s the native vlan on both sides.
interface Port-channel1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,56,57,189
switchport mode trunk

Magic number mismatch: bad mzip file in 3750 stack switch

Hi All can anybody help me in this error msg
"magic number mismatch: bad mzip file"
I am trying to upgrade the switch with"c3750e-ipbasek9-tar.122-55.SE5.tar" in 3750 stack switch it is showing this error msg while booting
thanks in advance

Hi,
The reason you are getting this error message on the switch is a corrupt or wrong IOS image "c3750e-ipbasek9-tar.122-55.SE5.tar".
If the switch is in rommon mode, and you have any other image in the switch, boot it using that image. Once the switch is up, download and copy the correct IOS image once again on the switch and try to upgrade.
If you need help in finding the correct IOS image, give me the exact switch model number, i will help you with that.
But forsure the image is wrong or corrupt and that is why you are getting this error.
Thanks
Ankur
"Please rate the post if found useful"

3750 stack won't sync with NTP server

Any help greatly appreciated with this one - I can't for the life of me figure out what's going wrong here.
I'm working on a 3750 stack in Singapore (UTC +8) and I'm trying to get it to sync its clock with 3.sg.pool.ntp.org.
This is the weird part - "sh ntp associations" shows that it is syncing:
address         ref clock       st   when   poll reach delay offset   disp
*~199.195.193.200 203.117.180.36   2     52     64   377 80.936 -13895. 1.771
* sys.peer, # selected, + candidate, - outlyer, x falseticker, ~ configured
And "sh ntp associations de" shows that it's happy:
199.195.193.200 configured, our_master, sane, valid, stratum 2
ref ID 203.117.180.36, time D691F63E.C4B691CD (17:26:22.768 UTC Tue Jan 28 2014)
our mode client, peer mode server, our poll intvl 64, peer poll intvl 64
root delay 196.39 msec, root disp 592.71, reach 377, sync dist 944.69
delay 80.93 msec, offset -13895.2686 msec, dispersion 2.65
precision 2**20, version 4
org time D691FA8F.5FF29003 (17:44:47.374 UTC Tue Jan 28 2014)
rec time D691FA9D.5041E9C7 (17:45:01.313 UTC Tue Jan 28 2014)
xmt time D691FA9D.3B3524C8 (17:45:01.231 UTC Tue Jan 28 2014)
filtdelay =    82.20   80.93   82.17   81.49 155.78   81.08   84.67   82.09
filtoffset = -13897. -13895. -13899. -13900. -13901. -13872. -13876. -13876.
filterror =     0.00    0.99    1.98    2.94    3.94    4.92    5.87    6.81
minpoll = 6, maxpoll = 10
But the clock is stubbornly remaining unsynchronised ("sh ntp st"):
Clock is unsynchronized, stratum 16, reference is 199.195.193.20
nominal freq is 119.2092 Hz, actual freq is 119.2092 Hz, precision is 2**17
reference time is 00000000.00000000 (08:00:00.000 UTC Mon Jan 1 1900)
clock offset is -13895.2686 msec, root delay is 0.00 msec
root dispersion is 14.62 msec, peer dispersion is 3.26 msec
loopfilter state is 'CTRL' (Normal Controlled Loop), drift is 0.000000000 s/s
system poll interval is 64, never updated.
NTP-relevant config is as follows (no ACLs, outbound UDP 123 allowed on perimeter firewall):
clock timezone UTC 8 0
ntp server 3.sg.pool.ntp.org
I have configured a pair of stacks in Hong Kong for NTP (though that was a couple of months ago and I recall that those were a pain at the time as well) and those are working fine.

Much to my annoyance, the switch stack is now synchronised. No configuration changes were made in the interim; it just looks like it needed a long time (well over an hour in this case) to start syncing properly.

Is 'Fat Cat iPhoto Library Manager' safe to use?

Hi there,
I downloaded 'Fat Cat's iPhoto Library Manager' today in the hopes of getting to grips with my 22+GB library... but after a few hours of creating some new libraries I've got a case of the willies! Is this a safe program to use? Is anyone else using it?
I only got my mac a few months ago (was a PC user ahem...) and have a crazy mix of photos - from scans of old family pictures, various phone photos, huge high res tiff scans, photos from friends cameras, e-mailed photos, our own old camera's etc etc etc.
Organizing any new pictures is a breeze, it's all these old ones with odd dates and so on that I'm having trouble getting my head round. Have no idea where to start! I thought 'Fat Cat iPhoto Library Manager' was a good idea but need some reassurance/advice before I go and potentially muck things up even further...

Absolutely. If you’re using iPhoto Library Manager simply to create new Libraries, then, no, you don’t need it.
However managing multiple Libraries - including moving pics/albums/rolls and metadata between them - is greatly facilitated by using iPhoto Library Manager, so it may still have value.
Regards
TD

Up-link 2 x 3750 Stack to 4 x 3850 stack

All -
Sorry is this is a rather simple question but I’ve never worked with Stack switches before? I have a remote office that has 3 floors. On one floor we have a 2 3750s in a stack. On another we have a single 3560 and I’m going to be installing a new 3850 stack – the new stack will have 4 x 3850’s...
My question is how should I uplink the other switches to the new stack? In the new stack I have a master a slave and two member switches. Should I create a port channel from the 3750’s and use all available links and spread them across all switches in the new stack, and then do the same with the single switch on the other floor? Or should I create two port-channels from the 3750 and the 3560 to the new 3850 stack?
My thought is that if I create a single port channel form each switch to the new stack I would be basically be removing spanning tree from the environment and basically daisy chaining the switches? Is this a valid solution? Also does the stack act like a chassis where the control plan would be on the master – if so can I spread a interfaces in a port channel across all members in the stack?
Thanks in advance
Mike

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Posting
To take advantage of fewest (logical) devices and redundancy, run a dual Etherchannel from your new 3850 to the 3750 stack and the 3650. On both the 3850 and 3750 stacks, insure the same Etherchannel links are on different stack members.
Logically, you would no longer need STP, but keep in running in case anyone accidentally creates a L2 loop.
As to what stack members to terminate uplinks/downlinks on, on 3750s, Cisco recommends avoiding the stack master (not possible on your dual 3750 stack). I don't know what Cisco's recommendations, if any, is for 3850 stacks.
Yes, stacks "appear" much like chassis devices, i.e. stack member ports "appear" like chassis line cards ports.

CAT 3750 and WCCP?

Is WCCP supported in CAT 3750?

Is WCCP supported in CAT 3750?
Hi,
Yes WCCP is supported with release 12.2 (37) SE in IP Services.Check out the below link from cisco for more information
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps5023/prod_qas09186a00801b0971.html
Hope to Help !!
Ganesh.H
Remember to rate the helpful post

Etherchannel issue between 3750 stack and WS-CBS3012 for IBM blade centre

Hi,
We are trying to configure Etherchannel between four ports of cisco 3750 stack(2ports from one switch of stack and two ports from another switch of same stack). We are facing issues with this setup. The ports in WS-CBS3012 are going to err disable mode.
Is there any limitations associated with such a cross-stack etherchannel configuration. Please suggest if there is any particular sequence of configuration involved.
Switch1 in stack
int gi 3/0/3
switchport mo trunk
switchport trunk allowed vlan 10-30
sw tr en dot1q
channel-group 1 mode on
spanning-tree guard root
switch 2 in stack
int gi 3/0/3
switchport mode trunk
switchport trunk allowed vlan 10-30
sw tr en dot1q
channel-group 1 mode on
spanning-tree guard root
int port-channel 1
switchport mode trunk
switchport trunk allowed vlan 10-30
sw tr en dot1q
channel-group 1 mode on
spanning-tree guard root
in WS-CBS3012 ports are configured with trunk,allowed vlan and etherchannel configuration with mode on.
With Regards,
Madhan kumar G

Hi,
The commnad "no spanning-tree etherchannel guard misconfig" on WS-CBS3012 resolved the issue.
Regards,
Madhan kumar G

VLAN on 3750 Stack

I am in the process of getting a 3750 switch stack installed. The stack will use layer 3 and will replace a 5505 layer 2 switch. The 5505 has all ethernet ports set to vlan 110.
My 3750 stack will also have all fasethernet ports in vlan 110.
I wanted to do as much of the up front installation prior to cutover, but did not to cause any problems in my vtp domain, so for the moment I have shutdown vlan 110 on the 3750 stack
I noticed that as soon as I did it took the following off of every fastethernet interface in the stack:
switchport access vlan 110
switchport mode access
While I sort of understand why..it has caused a little trouble because I have recently added another 3750 to the stack and was planning on configuring the rest of my interfaces using port range.
I assume the commands will be added back as soon as the interface vlan 110 is taken out of shutdown.
I was just taken by surprise that it modified the configuration as such and has made it hard to configure the other fasethernet ports I have added.
Hope this clear. Can anyone explain this a little more for me. Thanks

I want to try and add some clarification
I have 2 3750-48POE's in a stack...so I had 96 ports
each fastethernet interface on both 48 port switches was configured like this:
interface FastEthernet1/0/1
switchport access vlan 110
switchport mode access
switchport access vlan 410
switchport port-security
switchport port-security aging time 2
switchport port-security violation restrict
switchport port-security aging type inactivity
priority-queue out
mls qos trust cos
no mdix auto
spanning-tree portfast
spanning-tree bpdufilter enable
spanning-tree bpduguard enable
after shutting down the vlan 110 interface..Here's the config currently:
JDC-3750S-12#sh run int vlan110
Building configuration...
Current configuration : 199 bytes
interface Vlan110
description 10th, 11th, 12th Fl - Data
ip address 10.4.110.1 255.255.255.0
ip helper-address 10.4.1.100
ip helper-address 10.25.192.7
ip pim sparse-dense-mode
shutdown
After shutting down the interface for vlan 110, each fastethernet interface became
JDC-3750S-12#sh run int fa1/0/1
Building configuration...
Current configuration : 388 bytes
interface FastEthernet1/0/1
switchport access vlan 410
switchport mode access
switchport port-security
switchport port-security aging time 2
switchport port-security violation restrict
switchport port-security aging type inactivity
priority-queue out
mls qos trust cos
no mdix auto
spanning-tree portfast
spanning-tree bpdufilter enable
spanning-tree bpduguard enable
1.So you see that switchpot commands for vlan 110 got removed.
2. I have added another 3750-24 POE switch since doing this and wanted to use port range to make my additional set of ports like the ones in the original config.
I can't do that now because the vlan 110 info on the interfaces is gone.
I'm just trying to understand what this thing is doing to me. Hope this helps

Uplinks on 3750 Stacks

We are at the early stages in deploying a Campus LAN, at the access layer we are planning on using 3750 stacks with 2 x 2gb etherchannel uplinks going to diverse core switches; what is the best practice for the cross-stack etherchannel port assignment. E.g. Would it be best to put the first etherchannel uplink on the stack master and the second etherchannel on a non-master switch? Also what are the recommendations for using STP (R. PVST+) or load balancing in this scenario?

For cross-stack EtherChannel configurations, ensure that all ports targeted for the EtherChannel are either configured for LACP or are
manually configured to be in the channel group using the channel-group channel-group-number mode on interface configuration command. The PAgP protocol is not supported on cross- stack EtherChannels.
Here is the procedure from the 3750 12.2.25 docs.
This example shows how to configure a cross-stack EtherChannel. It
assigns two ports on stack member 2 and one port on stack member 3 to
channel 7 using LACP active mode:
Switch# configure terminal
Switch(config)# interface range gigabitethernet2/0/4 -5
Switch(config-if-range)# no ip address
Switch(config-if-range)# no switchport
Switch(config-if-range)# channel-group 7 mode active
Switch(config-if-range)# exit
Switch(config)# interface gigabitethernet3/0/3
Switch(config-if)# no ip address
Switch(config-if)# no switchport
Switch(config-if)# channel-group 7 mode active
Switch(config-if)# exit
check out the following link for more information on configuring Etherchannels :
http://www.cisco.com/en/US/customer/products/hw/switches/ps5023/products_configuration_guide_chapter09186a00801a658f.html#12539

Cross Applicatin Time Sheet (CATS) Vs Time Manager's Workplace

Dear Guru,
I am not an expert in HCM Module.
I would like someone to kindly do me a favour in explaining the diffent between CATS and Time Manager's Workplace.
The main objective is to select the right tool for implementing Time Sheet User Interface for "Incentive Wage/Piece Work Payroll Scheme".
Please kindly give me some light.
Thanks in advance.
Surapong

The Cross-Application Time Sheet (CATS) is a cross-application tool for recording working times and tasks. It enables you to control all business processes concerning your employeesu2019 tasks u2013 from paying the employees, through monitoring the progress of a project, to creating invoices.
Its main strength is that it enables your employees to record their own data.The Time Sheet is a cross-application component in SAP R/3.
The Time Manageru2019s Workplace is a user interface incorporating the tasks involved in administrating employee time and labor and time evaluation messages. It was specifically designed to meet the needs of time administrators in decentralized departments.
The Time Manageru2019s Workplace enables time administrators to do their daily work quickly.
The Time Manageru2019s Workplace replaces the majority of functions of the Maintain Time Data (PA61) Time Management Pool (PT40), and Time Recording for Multiple Persons and Infotypes (RPTTMW00) transactions

Re: Cat 3750 Stack Management

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