Cisco Switching/Routing :: Catalyst 3750X Stacking Convergence Time?

Nov 14, 2011

convergence time in case of stack master will be switched over to other switch.In my understating, when the stack master will be switched over to other switch based on election algorithm, convergence time will be less than 10 second.
 
I tried to calculate concersion time during fail over testing but convergence time was 21 second. I think it is too long...

Expected reasons

・I configured Rapid Spanning tree protocol between L3 and L3. (But RSTP's convergence time is 2~3 second..)

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Cisco Switching/Routing :: 4948 - RSTP Poor Convergence Time 30 Seconds

Dec 26, 2011

What's wrong with my config? If I shutdown a port or pull a link it takes ~30 seconds to converge.
 
I have set spanning-tree portfast default on the 4948's. Is it proper to set my uplinks on these switches (g1/1) to shared or does that disable RSTP?
 
Switch 1 & 2 are 4948's running 12.2(54)
Switch 1 & 2 are connected on port 43
 
Switch 1 port 1 is connected to the 7609 12.2(33) SRD5 on port g1/2 Switch 2 port 1 is connected to the 7609 on port g2/2
 
I have a host on Switch 1 port 42 for testing.

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Cisco Switching/Routing :: Stacking With 3750X?

Jan 1, 2013

There seems to be a lot of conflicting information on what can and can't stack together in the 3750X range.
 
I know that LAN Base can only stack with other LAN Base switches.
 
Can IP Base stack with IP services in 3750X? I have also heard that the 15.x.x IOS restricts mixed feature set stacks?
 
I know that Cisco recommends that all switches in a stack have the same IOS and feature set but having all IP Services in a stack can get too expensive.

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Cisco Switching/Routing :: 3750X And 3750 Stacking Together

Nov 1, 2012

I have two WS-C3750-48PS-S switches and I need to add two more.  The new part number I am looking at is WS-C3750X-48P-S will these all stack together ?

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Cisco Switching/Routing :: Stacking 3750X With 3750G?

Apr 22, 2013

I have one 3750X with C3KX-NM-10GT, I need to interconnect using stackwise to 3750G-24TS. The 3750X needs IOS 15.0(1) to use C3KX-NM-10GT, and the latest IOS for 3750G-24TS is 12.2.55. How can I interconnect them using diferent IOS?

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Cisco Switching/Routing :: Stacking A 3750X With 3750Gs

Jan 23, 2013

We currently have a stack of 3750G switches that are running 12.2(46)SE C3750-ADVIPSERVICESK9-M
 
Our 3750X is currently running 15.0(2)SE C3750E-UNIVERSALK9-M and I believe we were told you can't stack with a Universal IOS image. We have the universal on there because we have some 10GB fiber connections on it that Cisco told us wouldn't work otherwise.
 
I realize that the switch versions need to match, but the question is, which version should we work off to have use of the 10GB SFP card?

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Cisco Switching/Routing :: Stacking Switch 3750E And 3750X?

Oct 3, 2012

can I make the stacking of these two switches WS-C3750E-48PD-SF and WS-C3750X-48PF-L. Both have universal IOS.

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Cisco Switching/Routing :: 3750X Setting Up Power Stacking Switches

Dec 27, 2012

I'm trying to get some clarity on power stacking 3750X switches. I have a new stack of 6 switches. I know I can only have 4 in a power stack and all 6 in the data stack with a max of 8. I'm trying to find the proper way to connect the power stack cables for the 4 switch power stack.

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Cisco Switching/Routing :: Power Stacking For 3750x - Both Cables Needed?

Jun 7, 2012

Suppose I have a 3 member stack of 3750x switches.  Members a, b and c.I have all 3 members stacked with all 3 *data* stacking cables in a daisy-chain topology.  The 50 cm data stacking cable from switch a (on the very top) to switch c (on the very bottom) just barely reached.Of course, that means the 30 cm *power* stacking cable didn't reach between a & c.  Right now, the power stacking cable goes from a to b, and then another cable from b to c.  Leaving me with a useless extra 30 cm power stacking cable.
 
My question is, can switch "a" receive power from switch "c" through switch "b"?  Is this just a big electrical "bus"?  What if the power supply in switch "b" is removed?Just wondering if there is a need for me to get a longer power stacking cable (one of the 150 cm power stacking cables). 

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Cisco Switching/Routing :: Stacking 24 And 48 Port 3750X Switches Not Working?

Dec 11, 2012

We purchased a number of 3750X 48 and 24 port switches for the College Campus. Am finally getting around to getting them inserted on the network. Working with a WS-3750X-48PF-S and a WS-3750X-24P-L. Have them stacked with the 10Gb uplink on the 48 port switch. Have not been having fun.In the boot sequence, the switches recognize they are stacked, but as soon as they finish boot, I get the message on the 48 port switch: “Stack Port 1 Switch 1 has changed to state down.” Then “Stack Port 2 Switch1 has changed to state down.” Am noticing that I have a message preceding that: “Major version mismatch with stack neighbor.”The 48 port is running c3750e-universalk9-mz.150-1.SE3, HBOOT 12.2(53r)SE2.The 24 port is running c3750e-unversalk9-mz.122-55.SE3, HBOOT 12.2(53r)SE2Most of our 3750X and older switches are running 122-55 or 122.58 code. IP base or Universal. There is speculation that the problem is the 24 Port is Lan base, as the part number might indicate. (WS-C3750X-24-P-L.... I think that is the part number) and the 48 is IP base. Both switches are Universal, and my understanding is that they don't care about LAN or IP Base until you enable a function that falls in the IP Base domain. Then I have to call Cisco Licensing.For these switches, LAN Base is fine, based on the boot message, I feel the real problem is 122-55 versus 150-1 in the stack. So.. the question is: Do I downgrade the 48 port to match what we have in our environment, and what is on the 24 port switch. Or... Upgrade the 24 port switch to match the 48 port switch and have an installation that is not consistent with our environment? I do have two more edge closets to install with this purchase of 3750X 48 port switches.

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Cisco Switching/Routing :: 3750X - 48PS Switches Power Stacking

Mar 28, 2012

In my office we bought 7 cisco 3750X - 48PS switches. We configured Data Stacking between those switches. We also want to configure Power Stacking between those 7 devices.
 
I found in the Data Sheet that we can only configure 4 devices in power stacking at a time. If it is like that how to configure the rest of 3 devices. Need configuring power stacking between those devices in a better way..

power stack cable part no we have is
CAB-SPWR-30CM

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Cisco Switching/Routing :: 3750x Remove Stacking Option On Sunday For Testing

May 2, 2013

is it easy to remove the 3750x stacking?  i'd like to test one of them on a sunday and keep the other one on production.  it's just two stack of 3750x, is it hard and do i really need to remove the cables on the back?
 
basically i need to put a different config for my testing, i gues i need to remove the cables right?  and put it back on the stack before monday.

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Cisco Switching/Routing :: Stacking 3750g And 3750x - Hardware Version Mismatched

Jul 18, 2012

I am trying to stack a 3750g with a 3750x. At the moment they will not stack with their current IOS as the hardware version is mismatched.
 
According to various posts this is possible as long as the same IOS is in use. The following IOS are currently in use:
 
3750g     -     c3750-ipbaselmk9-tar.122-55.SE5
3750x     -     c3750e-ipbasek9-mz.150-1.SE3
 
I have tried to downgrade the IOS on the 'X' to 122-55.SE5 however, i get errors regarding firmware incompatibility.
 
I am unable to upgrade the IOS on the 'G' to 150-1.SE3, as the size of the IOS image is larger than the available flash (Version 15 IOS for the 3750G (c3750-ipbasek9-mz.150-1.SE3.bin) is 16,074,189 bytes whereas the 3750G has 16MB of flash memory or 15,998,976 bytes total which mean the IOS will not fit).
 
Has not actually stacked these devices successfully? I understand there may be license implications of upgrading to 15 but at the moment I just want them to stack!

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Cisco Switching/Routing :: Catalyst 2960-S Stacking Connection

Apr 11, 2012

I followed the 3-switch Redundant stacking diagram and now when I boot up the stack Switch 2 is acutally Member 3 and Switch 3 is Member 2.
 
We plan on having Port-Channels spanning across Switch 1 - Master and Switch 2 (Member 3) of identical port types. Switch 3 (Member 2) is going to have 2 10GIG port channel created.
 
Is there going to be a problem renumbering the stack as they physically sit or should I just configure the devices based on thier logical member numbers.
 
I don't understand why the stack connection is Switch 1 - 1 ----> Switch 2 -1
                                                                    Switch 2 - 2 ----> Switch 3- 1
                                                                    Switch 3 - 2 ----> Switch 1 - 2

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Cisco Switching/Routing :: Downgrade 3750X With IP Base To LAN Base For Stacking

May 6, 2012

I have a WS-C3750X-12S-S (IP Services) that I THINK I'd like to downgrade to LAN Base so I can stack it with a WS-C3750X-48T-L that is already LAN Base..

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Cisco Switching/Routing :: Catalyst 3750X Upgrade Failed?

Jan 27, 2013

I try to updgrade a stack of two 3750X-48PS to the IOS 15.0-2
 
Same commande has the twelves others stack I have upgrade lately
 
archive download-sw /overwrite tftp://x.x.x.x/c3750e-universalk9-tar.150-2.SE.tar
 
or
 
archive download-sw /overwrite usbflash0:/3750/c3750e-universalk9-tar.150-2.SE.tar (much faster!)
  
At the end I have this message :
 
extracting c3750e-universalk9-mz.150-2.SE/info (511 bytes)
extracting c3750e-universalk9-mz.150-2.SE/c3750e-universalk9-mz.150-2.SE.bin (19842267 bytes)

[Code].....

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Cisco Switching/Routing :: Cannot Upgrade Servicemodule In Catalyst 3750X

Mar 25, 2013

I have upgraded my Catalyst 3750X-switches to software-version 15.0(2)SE2, but I cannot upgrade the 10G servicemodule to the same version. I use the archive download-sw command to load the c3kx-sm10g-tar.150-2.SE2.tar. The file is loaded to the switch, but when the process starts to transfer the file to the module it fails with the following messages:
 
Error 2: Unable to transfer image to FRU Modul on switch 1Error: Failed to update FRU Module image 
 
The modules is now running with in-compatible versions as shown below:
 
Switch# H/W Status (CPU/FPGA) CPU Link Version
-----------------------------------------------------------------
1 OK 77C/71C ver-mismatch 03.00.41
2 OK 73C/73C ver-mismatch 03.00.41

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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 :: Catalyst 3750X - Network Module 1/10G

Apr 9, 2013

Is it possible to mix 1 and 10 Gigabit links on a 1/10Giga Network Module of the Cat3750X? I mean porte GE1/1/1 and GE1/1/2 used with SFP and port TE1/1/2 used with SFP+; that makes TE1/1/1 not available as GE1/1/3 and 1/1/4

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Cisco Switching/Routing :: Catalyst 3750X-48P Switch Ports Dead

Jan 31, 2012

I work at a hospital and we have 3750X-48P switches in stacks in various locations throughout the hospital.  We have noticed that when an EKG machine is plugged into one of the ports on some of these switches and the EKG machines are set manually to 100/Full, the ports are no longer usable until the switch is restarted.  The switch is configured for auto.  If the EKG machine is set to auto, it will work and not cause problems.  The link on the interface will show up/up and there will be output packets increasing.  However, there will be no inputs on the link and the port is unusable.  Unfortunately, even when the device is removed, the port becomes unusable for any device.  Is there any way to fix this problem without rebooting the switch?

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Cisco Switching/Routing :: Port Numbering On A Catalyst 3560 / 3750X

Apr 10, 2012

Assume I had Catalyst 3560X/3750X with 24 ports. The partnumber is WS-C3560X-24P-LI would like to how is the numbering defined if the switches have a C3KX-NM-10G installed with 4 SFP-GE-L.

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Cisco Switching/Routing :: Catalyst 3750X Is Caching Tacacs Password?

May 17, 2012

the following information before:
 
Switch:  WS-C3750X-48P   (Stack with 2 Members)
IOS:      12.2(58)SE2
Lic:       IPBASEK9
uptime:  rebooted this night
 
[code]....
 
Since i added another Member to the Stack, i'm facing the following problem:When i login with my tacacs user account, i will not be asked for the password.The same thing is for the tacacs account of my colleague, after entering the username he is logged in.It seems for me, that the passwords are cached only for this Switch.

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Cisco Switching/Routing :: Catalyst 3750x 24 PS POE With C3KX-NM-10G Uplink Modules?

Sep 5, 2012

our network is spread over  15 floors and each floor we have 5-6 switches. we are planning to purchase cat3750-x 24 ps poe with C3KX-NM-10G  network modules. Each floor has two up links  to the core  switch  with  single mode fiber and other being the multimode.Suppose if we are purchasing 75 switches  do we have to  purchase 75 C3KX-NM-10 G  modules.? or  can we limit our purchase with 15 C3KX-NM-10G   sothat two uplinks from each floor can be made?  since network modules are optional cost factor is invovled. Or any issue with stacking ? the SFPs will be LR  and LRM MODULES.looking for an answer ? whether the new usb type console cable comes bundled with  cat350x or shall we have to order separately?

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Cisco Switching/Routing :: ICMP High Response Time To SVI Interface 3750X

Mar 13, 2011

I am in the process of installing a 3750x (IOS 12.2 (53r) SE2 IP Base) Cisco Catalyst switch in a new network of just 2 PC's (2 hosts, OS windows7 64Bits). I have enabled SVI interfaces with the both hosts installed in 2 different network segments.  We then start connectivity test.  The response time for the PING command between both hosts remain below 1 millisecond, whereas the response time between the hosts and their correspondent SVI interface is variable, and at all time is higher than 1 millisecond, sometimes it reaches 17 milliseconds. (Note that the switch CPU usage is only 8% at the time of testing)  We have performed this same connectivity test changing the 3750x switches  and in two different locations obtaining the same results. 

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Cisco Switching/Routing :: Catalyst 3750X With PoE Secondary Power Supply Options?

Jul 21, 2012

When quoting a Catalyst 3750X with PoE (WS-C3750X-48P-E) the Dynamic Configurator Tool allows to include as the secondary power supply option the Catalyst 3K-X 350W AC Secondary Power Supply (C3KX-PWR-350WAC/2), but the default included primary power supply is the Catalyst 3K-X 715W AC Power Supply (C3KX-PWR-715WAC). My questions are the following:
 
1. Will this combination of power supply work?

2. Will the C3KX-PWR-350WAC/2 be able to power up the switch if the primary power supply of 715W fails?

3. Will the PoE will be lost if the primary power supply fails and only the secondary power supply of 350W keeps working?

4. If this secondary power supply of 350W is not suitable for PoE, why it is available as a secondary power supply option in the Dynamic Configurator Tool for a PoE switch?

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Cisco Switching/Routing :: WCCP Settings In Catalyst 3750X And Barracuda Web Filter

May 12, 2013

configuration of a Catalyst 3750X and Barracuda Web Filter using WCCP protocol.
 
We used various WCCP protocol settings, unable set to redirect traffic to the Web Filter.
 
This is the current configuration of 3750X:
 
ip routing
ip wccp 94 redirect-list 194 group-list 50
ip wccp 95 redirect-list 195 group-list 50

[Code]......

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Cisco Switching/Routing :: Catalyst 3750X OSPF Support In IP Base Image?

Apr 3, 2011

I'm trying to work out if I need to order the "IP services" image for a couple of C3750-X.  I need to run OSPF on these switches, but find the IOS image requirements on Cisco contradict.
 
At the top of the data sheet it says: • Open Shortest Path First (OSPF) in IP Base image

On the product info page it says: IP Base: Enterprise Access Layer 3 Switching, including OSPF (Open Shortest Path First) for routed access 
 
But in lots of other places it says you need 'IP services' for OSPF.
  
As the IP services IOS is quite a bit more expensive I would like to avoid buying it. What image do I need to run OSPF?

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Cisco Switching/Routing :: IP SLA ICMP Echo Support Catalyst 3560X / 3750X?

Feb 13, 2012

Need to clarify if ip sla icmp echo operation is supported in catalyst 3kx switches (ip services)? on the configuration guide, commands are available, but on the feature navigator, i can't find the feature, only ip sla video operation. i don't have a device to test on here.

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Cisco Switching/Routing :: Outbound Versus Inbound Access Lists On Catalyst 3750X?

Mar 17, 2013

I want to configure accesslists on my Catalyst 3750X-switches to protect different VLANs/networks. Any best-practices about inbound versus outbound accesslists? In my head it is more readable and easier to understand the config when accesslists are assigned outbound on the VLAN to protect instead of assigning them inbound on all possible source-VLANs. But of course, from a performance point-of-view it is better to use inbound access-lists to avoid un-necessary routing etc.

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How To Calculate Network Convergence Time In OSPF

Feb 2, 2012

I want to measure the the ospf convergence time on the given network topology (assume 5 nodes - partial mesh topology).I am using quagga software as routing software on linux box. Quagga is runnign fine and network is converged, able to see all the routes.. Quagga software is logging all the osfp information includign packets,state machines,etc.I am going to disconnect a link between node a to node b. and i want to measure the convergence time of the network.What is the network convergence time?My answer is, The time taken to reflect the topology change (link down/up, network condition change) to all the routers on the topology.Some routers(close by routers to the topology change) will get converged fast, and some routers(far away from the topology change) will have the higher convergence time. we have to take the highest convergence time of the router on the topology and we can says thats the ospf network convergence time.

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Cisco WAN :: Slow BGP Convergence With Catalyst 6500 Quad

Nov 28, 2012

I set up Catalyst6500 Quad-SUP VSS system.I have a problem with slow BGP convergence(80sec) on VSS switchover.Each chassis has a bgp peer and "bgp graceful-restart" is disabled.I investigated BGP behavior with "debug ip bgp events" and "debug ip bgp update".I found that BGP process waited a peer to reply until timeout and after the timeout BGP table was calculated.I guess this timer makes the convergence slow.How can I adjust this timer value ?

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Cisco Switching/Routing :: Shutdown Specific Port On 3750x And Monitor Port At Same Time?

Oct 23, 2011

is it possible to shutdown a  specific port on my 3750x and monitor this port at the same time .for example , im dealing with a mac authenticated network using port security , i want to shut down all the ports that are not used at the moment , however , if some one gets connected to the one of the shutdown ports  i want to know the mac address of the user or atleast to know that i have someone who is just plugged in to the one of the shutdowned ports .

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Cisco Switching/Routing :: 7609 Slow RSTP Convergence

Nov 22, 2011

I have a 7609 with two LAG groups (Etherchannel not LACP) going to two separate devices that DO NOT participate in spanning-tree (Occam gear if you must know). I'm running 802.1w across the LAG groups but the convergence time is terrible! In essence, the 7609 is running spanning tree against itself (between the two blades). What can I do to fix my configuration?
 
If I disable the ports on the equipment connected to g1/17 & g1/18, it takes ~30 seconds for spanning tree to start forwarding on g2/17 & g2/18.When I bring the ports back up on the other side of g1/17 & g1/18 which are in a lag group, g2/17 & g2/18  immediately go into block mode while g1/17 & g1/18 start learning for another ~30 seconds!! [code]

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