STP and Loop Guard
Hi everyone, I've a question for you guys:
Please check this topology: http://www.cisco.com/warp/public/473/84d.gif
I've read that you must enable loop guard on every nondesignated port (root and alternate ports) to prevent unidirectional related loops. I understand the situation where switch C unblooks the AP port and cause a loop. But what if the link is not unidirectional, what if switch B has some problem and indeed switch C should forward traffic to the segment C-B? Is there a difference between the link going down (disconected)and just stop seeing BPDUs?
Also, why would anyone configure loop guard on a root port? If for example, SWC stops seeing BPDUs from SWA, what would loop guard do? put the port in a block state or it would recalculate its Root port (port to SWB) and put the port to SWA into a designated state (after not receiving BPDS from SWA)? I'm very confused, any help would be greatly apretiated.
Omar Montes
The assumption made by STP is that if a link is not able to transmit BPDU, it is down. So if there is bidirectional link failure, the case is natively handled by STP. If there is only unidirectional link failure, you could end up with a unidirectional loop (which is about as bad as a bidirectional loop;-))
Loopguard is relevant on each port that is supposed to continuously receive BPDU. If your root port stop receiving BPDU, STP will move it to designated and elect a new root port. This is ok if your old root port cannot receive and transmit traffic. However, if the link is unidirectional and the port does not get blocked by loopguard, you will have a loop through the old and the new root port (in one direction only, the old root port TX direction).
Configuring loopguard on a designated port will not cause any problem anyway, so in fact you can configure loopguard blindly on all the port.
The IEEE introduced a feature (the dispute mechanism) that works much better than loopguard in order to protect against unidirectional link failure. However, this mechanism requires an RSTP bpdu format. It is currently only implemented in MST on cisco switches (it will be soon available in rapid-pvst). No need to use loopguard with the latest MST code at least.
Regards,
Francois
Similar Messages
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Question in switching for STP and loop
hi ,
i have a question in loop issue , will it occur in this case or not
i will describe my scenario as below :
now i have 4 switches connected with full mesh.
=================
3 of them has stp protocol enabled
only 1 of them is un manged and dont support STP protocol
====================================
the question is :
if i connected the 4 switches full mesh , will the loop occurs ??
as i believe , stp loop prevention depend on the switch itself not on their neighbour , but not sure from my understanding
wish to help
regardsDisclaimer
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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 there's only one or two non-STP switches, in a full mesh, you'll be okay. Once you have at least three non-STP switches, in a full mesh, you have a loop between them. -
3750x2 Disable loop guard and the effect on connectivity
Hello,
I have two building about 500 yards apart. They are connected via a Lightpointe FSO (Free Space Optics) Laser and Airbridge (802.11n RF) point to point bridge. The transport up to the head is done via a multimode fiber optic cable.
When the signal level is good, FSO can achieve the full 1gbps link between buildings. When the signal level falls below a definable threshold (in my case 250 mV), the Airbridge 802.11n RF point to point takes over. This runs in the 5 GHz band on a 40 MHz channel, theoretic speed of 144 to 300mbps.
The issue I have is when this failover occurs, the switch port will go into Loopguard_block and the remote building is dead in the water. I happened to be over there today when this occurred and my quick fix was to unplug the fiber and plug it back in. I since changed the thresholds and widened the window for the Laser to RF failover. If the signal is below 250 mV, it fails over to RF. It does not attempt to return to Laser until the signal hits 350 mV. This "deadband" of 100 mV is to prevent flapping. Previously it was a low of 250 and a high of 300. So hopefully this helps.
However if I were to want to disable Loop Guard, can I do it and what kind of ill effects would that have - if any? Would I do this at both endpoints, or just the remote location? The other end is our HQ and it goes right into the core switch stack (a group of 3750 switches).
sh log on remote switch
001056: Apr 30 18:04:12.261: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port GigabitEthernet1/1/1 on VLAN0044.
001057: Apr 30 18:04:12.269: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan44, changed state to down
001058: Apr 30 18:07:50.839: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/1/1, changed state to down
001059: Apr 30 18:07:52.853: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/1/1, changed state to up
001060: Apr 30 18:07:52.920: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan44, changed state to up
001061: Apr 30 18:43:32.900: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port GigabitEthernet1/1/1 on VLAN0044.
001062: Apr 30 18:43:32.908: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan44, changed state to down
001063: Apr 30 18:43:32.925: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port GigabitEthernet1/1/1 on VLAN0044.
001064: Apr 30 18:43:33.000: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan44, changed state to up
001065: Apr 30 20:06:40.829: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port GigabitEthernet1/1/1 on VLAN0044.
001066: Apr 30 20:06:40.846: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan44, changed state to down
001067: Apr 30 20:06:40.863: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port GigabitEthernet1/1/1 on VLAN0044.
001068: Apr 30 20:06:40.913: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan44, changed state to up
Physical connectivity:
Cat6 cable solely for powering (not connected to switch - connected to Lightpointe 48vdc power injector)
multimode fiber cable connected to Lightpointe FSO head.
FSO head has a cat 5e data port that passes power and data to a ubiquiti AirOS 5 powered nanostation (they brand this Airbridge).
Something internally in the FSO linkhead shifts the data flow to the ubiquity nanostation (and back) automatically. Regardless of this activity, all data traverses that multimode fiber. We do not handle any type of routing as the Lightpointe unit does it itself. It is supposed to look like an ethernet handoff.
We use VLAN44 (192.168.4.1) as a transport network and the switches are in layer 3 mode.Ok this is from the vendor:
On a Cisco 3750x2 L3 switch, would there be any special port config statements to mitigate this? Should not be needed, but you can turn off Spanning Tree since the redundancy is being handled by the laser / RF combination on the roof.
So if I put spanning-tree portfast on the uplink port at the HQ and at the Remote side, that would effectively turn off spanning tree and prevent the port from going into loopguard? Am I correct? If the hardware on the roof handles 100% of the laser or RF mode of operation, then I don't need the Cisco switch to intervene. Thoughts? -
SG200-26 STP BPDU and Root Guard
Hi all,
in the 1.3 User Guide in release notes it states that the SG200 series should support BPDU and Root guard. I have installed 1.3.7.18 and I can't find both options in the mentioned sections Where the dropped in this Firmware version?
Thank you.
Cheers
FredStep 1. Log in to the web configuration utility and choose Spanning Tree > STP Interface Settings. The STP Interface Settings page opens:
Step 2. Choose an interface from the Interface Type drop-down list.
Step 3. Click Go to display a list of ports or LAGs on the interface.
Step 4. Click the radio button of the port or LAG you want to modify and click Edit. The Edit STP Interface Setting window appears and you should be able to see Root Guard and BPDU guard -
Bridge assurance vs Loop Guard
Hi all!
I can't understand practical advantages of Bridge Assurance compared with Loop Guard.
What exactly can do BA and can't do Loop Guard?
Than you!!Hi,
I hope you might have already read the below link which gives detailed explanation of what these two stp features does:
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/stp_enha.html#wp1052528
http://www.netcraftsmen.net/blogs/entry/what-is-bridge-assurance.html
2)
There are a few scenarios where LoopGuard would not be effective at detecting loops and/or unidirectional links.
- can only be enabled on root & alternate ports. it CANNOT run on 'designated ports'.
- ineffective at detecting a port that has been unidirectional since link-up.
Bridge Assurance (BA) is effective at mitigating those remaining scenarios that LoopGuard could not.
BA works because it turns STP into operating more like a routing protocol where BPDUs now go both ways on a given link verifying device health/awareness / lack of braindeadness.
i.e. it turns STP from traditional "fail open" behavior to "fail closed".
compare figure 1 to figure 3 in
<http://www.cisco.com/en/US/docs/switches/datacenter/sw/4_2/nx-os/layer2/configuration/guide/Cisco_Nexus_7000_Series_NX-OS_Layer_2_Switching_Configuration_Guide_Release_4.2_chapter7.html#con_1285149>
and it should be clear.
HTH
Regards
Inayath
***** Please rate if this post if the info is usefull. -
Spantree Loop Guard (question)
Hi All,
I would like to ask about one feature:-
(Spantree loopguard default), what does this feature provide?? And when should I use it??Hello,
Ive never seen it configured in the networks I've worked on, but loopguard is STP feature that will monitor ports that were once receiving BPDU packtes. If these port stop receiving it, this could create a loop, so if you have loopguard enabled on this port the STP will block the port for going to FWD state.
Check:
The loop guard is intended to provide additional protection against L2 forwarding loops (STP loops). An STP loop is created when an STP blocking port in a redundant topology erroneously transitions to forwarding state. This usually happens because one of the ports of a physically redundant topology (not necessarily the STP blocking port) stopped receiving STP BPDUs. In its operation, STP relies on continuous reception or transmission of BPDUs, depending on the port role (designated port transmits, non-designated port receives BPDUs).
When one of the ports in a physically redundant topology stops receiving BPDUs, the STP conceives the topology as loop free. Eventually, the blocking port from the alternate or backup port becomes designated, and moves to forwarding state, thus creating a loop.
With the loop guard, an additional check is made. If BPDUs are not received any more on a non-designated port and the loop guard is enabled, that port will be moved into the STP loop-inconsistent blocking state instead of moving to the listening / learning / forwarding state. Without the loop guard, the port would assume the designated port role. The port would move to STP forwarding state, and thus create a loop. "
So, on which ports should the loop guard be enabled? The most obvious answer is on the blocking ports. However, this is not totally correct. The loop guard needs to be enabled on the non-designated ports (more precisely, on root and alternate ports) for all possible combinations of active topologies."
HTH,
if it does, I'd appreciate if you rated this post.
Vlad -
Loop guard & udld agressive - etherchannel
Hi,
Can anybody pls share whether I need to enable loop guard & udld agressive config on Ether-Channel
what is the ciso recomendation / Pls share the document for the same
Also pls share in case the same is required on Physical interface or on Port-channel interface,
As per my understanding it is required on Physical interface
Br/Subhojitwhat is the ciso recomendation / Pls share the document for the same
Link: STP Enhancements using Loop Guard and BPDU Skew Detection Features # Loop Guard versus UDLD
"(...) UDLD might be more flexible in the case of unidirectional links on EtherChannel. In this case, UDLD disables only failed links, and the channel should remain functional with the links that remain. In such a failure, the loop guard puts it into loop-inconsistent state in order to block the whole channel."
HTH
Rolf -
I am planning to implement the enable the loop guard option. I Just want to Know will there be any STP topology change.( topology recalculation)
I suppose everybody thinks they know what they are doing when they are doing it.
Configuring portfast on a live switch can be very dangerous.
Scenario:
Two access switches are uplinked to a pair of core switches without portfast enabled on the access ports. A user has connected a hub in a conference room and mistakenly connected 2 ports on the hub to the network, one to each access switch. An engineer configures portfast on the access switches and a bridge loop is created. So much traffic floods through the loop that HSRP and routing protocols start breaking, STP is unable to break the loop. The whole network comes to a stand still.
This isnt something made up. This has actually happened. I was called to the scene to help clean up the mess. -
Why would you NOT enable Loop Guard on switch ports?
Hello
Why would you NOT enable Loop Guard on switch ports?
It is disabled by default on all ports.
Since it prevents loops, in the absence of receiving BPDUs on non-designated ports, why would it not be enabled by default?Ziffy wrote:
The Galaxy S4 supports Google Wallet, but yet you block it from being used. Why exactly? This is not right. I suggest you enable it before you start losing customers. Is there anybody out there that would like to start a petition? Perhaps look into whether or not this is actually legal? Seems like unfair practices to me. Thoughts?
Good luck with that. FCC already did and have left it alone... My theory is because... Google charges carriers to use allow devices to use it. At one point Sprint paid to go exclusive for wallet. FCC can't force you to buy your competitors product. -
Hi All,
STPs job, is to indentify links and manage possible loops in redundant networks(correct me if I'm wrong). I can attach a number of switches, that aren't using vlans(meaning no trunk links) just by attaching cables to and fro. Then, of course, I can have vlan enabled switches, that are interconnected via trunk links. Does STP distinguish between the two, and how..? I'm looking for a more detailed analysis of how it does this. CCNA Intro/ICND books don't explain well the difference, if 1 exists. Cheers.
coolboarderguy...Hello,
STP does not distinguish between trunk links or access links. It listens to BPDU's (Bridge Protocol Data Units), if those are present on a port, the port will participate in the STP process. So, you could disable STP for all VLAN's on a trunk, and the trunk would not participate in STP.
Or, in CCO terminology:
Spanning-Tree Protocol (STP) prevents loops from being formed when switches or bridges are interconnected via multiple paths. Spanning-Tree Protocol implements the 802.1D IEEE algorithm by exchanging BPDU messages with other switches to detect loops, and then removes the loop by shutting down selected bridge interfaces. This algorithm guarantees that there is one and only one active path between two network devices.
HTH,
GP -
I just finished creating a movie using IMovie and want to burn it to a DVD and loop it. Since I just purchased this mac it looks like they no longer include IDVD. Is there something out there to help me do this. I am new to MAC and any help would be greatly appreciated. Thanks
There is free open source software called Burn that will burn DVDs. Here is a link.
If you wish to pay for software, there are many, including TOAST TITANIUM from Roxio. Apple's retail copy of iLife 11, and Apple's Compressor.
Of these, I would say that iDVD is known for being able to create very professional looking DVDs with intros, menus, lots of interesting templates.
Toast is much simpler and the menus and templates are more plain.
Compressor is a professional tool that does a lot more than make DVDs. Don't expect much in the way of menus or templates.
Burn, I have never tried, since I have iDVD and Toast for those ocasions when I need to burn a DVD. However, since it is free, I think it is worth a try.
Each software package is a little different, but in general, in iMovie, you can use the SHARE menu to SHARE/MOVIE in Large size. Save the movie to your desktop or someplace you can easily find it. Then drag it into the tool of your choice. You can alsouse SHARE/MEDIA BROWSER/LARGE if you have iDVD or Toast. -
Problem with java swing button and loop
Problem with java swing button and loop
I�m using VAJ 4.0. and I�m doing normal GUI application. I have next problem.
I have in the same class two jswing buttons named start (ivjGStart) and stop (ivjGStop) and private static int field named Status where initial value is 0. This buttons should work something like this:
When I click on start button it must do next:
Start button must set disenabled and Stop button must set enabled and selected. Field status is set to 1, because this is a condition in next procedure in some loop. And then procedure named IzvajajNeprekinjeno() is invoked.
And when I click on stop button it must do next:
Start button must set enabled and selected and Stop button must set disenabled.
Field status is set to 0.
This works everything fine without loop �do .. while� inside the procedure IzvajajNeprekinjeno(). But when used this loop the start button all the time stay (like) pressed. And this means that a can�t stop my loop.
There is java code, so you can get better picture:
/** start button */
public void gStart_ActionEvents() {
try {
ivjGStart.setEnabled(false);
ivjGStop.setEnabled(true);
ivjGStop.setSelected(true);
getJTextPane1().setText("Program is running ...");
Status = 1;
} catch (Exception e) {}
/** stop button */
public void gStop_ActionEvents() {
try {
ivjGStart.setEnabled(true);
ivjGStart.setSelected(true);
ivjGStop.setEnabled(false);
getJTextPane1().setText("Program is NOT running ...");
Status = 0;
} catch (Exception e) {
/** procedure IzvajajNeprekinjeno() */
public void IzvajajNeprekinjeno() { //RunLoop
try {
int zamik = 2000; //delay
do {
Thread.sleep(zamik);
PreberiDat(); //procedure
} while (Status == 1);
} catch (Exception e) {
So, I'm asking what I have to do, that start button will not all the time stay pressed? Or some other aspect of solving this problem.
Any help will be appreciated.
Best regards,
TomiThis is a multi thread problem. When you start the gui, it is running in one thread. Lets call that GUI_Thread so we know what we are talking about.
Since java is task-based this will happen if you do like this:
1. Button "Start" is pressed. Thread running: GUI_Thread
2. Event gStart_ActionEvents() called. Thread running: GUI_Thread
3. Method IzvajajNeprekinjeno() called. Thread running: GUI_Thread
4. Sleep in method IzvajajNeprekinjeno() on thread GUI_Thread
5. Call PreberiDat(). Thread running: GUI_Thread
6. Check status. If == 1, go tho 4. Thread running: GUI_Thread.
Since the method IzvajajNeprekinjeno() (what does that mean?) and the GUI is running in the same thread and the event that the Start button has thrown isn't done yet, the program will go on in the IzvajajNeprekinjeno() method forever and never let you press the Stop-button.
What you have to do is do put either the GUI in a thread of its own or start a new thread that will do the task of the IzvajajNeprekinjeno() method.
http://java.sun.com/docs/books/tutorial/uiswing/index.html
This tutorial explains how to build a multi threaded gui.
/Lime -
PowerMac G5 Dual 2.5 - Only Boots with Side Cover and Fan Guard OFF!!
I have the strangest problem with my PowerMac G5 Dual 2.5. This has been my Pro Tools rig forEVER.
At some point early last year, my Mac wouldn't boot. It would not see the hard drive, and would show that dreaded alternating icon in the middle of the screen indicating as much. I tried resetting, tried power off/on, tried resetting PRAM. Nothing. I took the cover off, and fan guard off to get at the hard drive. Verified the data and power cable were seated in hard drive. Cover still off, I booted up the system. Voila!!! Booted right up like nothing was ever wrong. I put the cover back on, and went about my business, passing it off as a one-off power glitch (the power in my house ***** rocks). Next time I rebooted the Mac, the exact same thing happened.
I can repeat this at will. If I leave the cover on, the system will not ever, ever boot. The minute I take the cover and fan guard off, causing the fans to spin at max speed when turned on, the system boots without issue. So, I reset PRAM and PMU. I even tried replacing that green/white cylindrical battery on the motherboard. Reseated power/data cable on hard drive. ****, I even tried a different hard drive and memory (explained below). No change.
Since then, I have relegated this system to the emergency backup system, and procured Dual 2.7 G5 PowerMac. I transferred the pro tools cards, hard drive (without formatting it) and memory (8 GB) to this new 2.7, and have not had a single, solitary issue with it. So, I know it's not the hard drive, memory, OS install, or Pro Tools cards.
What in the name of the Apple Gods could be causing this issue? Any ideas at all?Hi Chris,
Good info & work so far, but indeed strange, only thing I can think of is something to do with that little switch for the fan cover... near the bottom as I recall, but it may be some kind of short in it's circuit. -
Hello.... I already loaded logic 9 on my laptop hard drive... I would to load all the samples and loops on an external drive... Do I need to reinstall from DVD's or can I drag and drop?
Thank you.... Would you know where they would be on my hard dive? Are they all together?
-
After first installing the new Mountain Lion upgrading Lion on my Macbook Pro was a little slow, so I decided to format and install Mountain Lion via a thumb drive. After installation on my Macbook Pro was restarting all the time and showing a black screen with codes on the screen. I decided to reformat and reset the PRAM, and that seems to have worked. Occasionally a black screen appears with the codes and my macbook restarts again. Last night I updated the Mountain Lion and error and looping retornartam. I thought I had lost all my works, do more entered in the login screen. I turned off my macbook, went to sleep and this morning I called and finally worked Do not know what's going on in my friends' macbook not occur this problem. The macbook them is the 2011 13 "i5 2.0Ghz and another 2010 and they both work perfectly with the Mountain Lion.
Below is the error that occurred this morning after login.
Interval Since Last Panic Report: 1690 sec
Panics Since Last Report: 1
Anonymous UUID: 67D1DCE1-6759-7BF0-6682-40BCBB09D01B
Thu Sep 20 07:24:10 2012
panic(cpu 2 caller 0xffffff80206b7bd5): Kernel trap at 0xffffff8020687d02, type 14=page fault, registers:
CR0: 0x0000000080010033, CR2: 0x00007ccd02000009, CR3: 0x00000000228a6000, CR4: 0x00000000000606e0
RAX: 0x00007ccd02000001, RBX: 0x000000000000003e, RCX: 0xffffff8020cbd000, RDX: 0x000000000000003e
RSP: 0xffffff8110da3720, RBP: 0xffffff8110da3740, RSI: 0xffffff8031ef80c8, RDI: 0xffffff8020cbd000
R8: 0xffffff8031ef7750, R9: 0xffffff8031ef0438, R10: 0xffffff8020cbcc20, R11: 0xffffff814c6e0000
R12: 0xffffff8033b0ec00, R13: 0xffffff8033b0ecb0, R14: 0x00000000000000c1, R15: 0xffffff8031ef0438
RFL: 0x0000000000010296, RIP: 0xffffff8020687d02, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0x00007ccd02000009, Error code: 0x0000000000000002, Fault CPU: 0x2
Backtrace (CPU 2), Frame : Return Address
0xffffff8110da33c0 : 0xffffff802061d626
0xffffff8110da3430 : 0xffffff80206b7bd5
0xffffff8110da3600 : 0xffffff80206ce4ed
0xffffff8110da3620 : 0xffffff8020687d02
0xffffff8110da3740 : 0xffffff802065f445
0xffffff8110da38a0 : 0xffffff8020681b58
0xffffff8110da3bf0 : 0xffffff802065e1b4
0xffffff8110da3c50 : 0xffffff8020a52e4f
0xffffff8110da3d40 : 0xffffff8020a53052
0xffffff8110da3d70 : 0xffffff7fa1e35434
0xffffff8110da3de0 : 0xffffff7fa1e2412f
0xffffff8110da3e10 : 0xffffff7fa1e33afe
0xffffff8110da3e60 : 0xffffff8020a3181b
0xffffff8110da3ea0 : 0xffffff8020a3133e
0xffffff8110da3f30 : 0xffffff8020a2d2d0
0xffffff8110da3f70 : 0xffffff8020a31e99
0xffffff8110da3fb0 : 0xffffff80206b26b7
Kernel Extensions in backtrace:
com.apple.driver.AppleIntelHD3000Graphics(8.0)[EAD976F9-7469-3F17-AB8E-6A039213 8DCB]@0xffffff7fa1e06000->0xffffff7fa1e67fff
dependency: com.apple.iokit.IOPCIFamily(2.7.1)[9901C237-547C-3B52-99DE-C4870A19E2B5]@0xffff ff7fa0caf000
dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7fa11fc000
dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7fa11b9000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
12C54
Kernel version:
Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64
Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333
Kernel slide: 0x0000000020400000
Kernel text base: 0xffffff8020600000
System model name: MacBookPro8,1 (Mac-94245B3640C91C81)
System uptime in nanoseconds: 22884276012
last loaded kext at 22356664762: com.apple.driver.AppleMikeyHIDDriver 122 (addr 0xffffff7fa1d76000, size 20480)
loaded kexts:
com.apple.driver.AppleMikeyHIDDriver 122
com.apple.driver.AppleHDAHardwareConfigDriver 2.3.1f2
com.apple.driver.AppleHDA 2.3.1f2
com.apple.driver.AppleUpstreamUserClient 3.5.10
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.ApplePolicyControl 3.2.11
com.apple.driver.AppleIntelHD3000Graphics 8.0.0
com.apple.driver.AppleSMCPDRC 1.0.0
com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
com.apple.driver.AppleLPC 1.6.0
com.apple.driver.AppleBacklight 170.2.3
com.apple.driver.AppleMCCSControl 1.0.33
com.apple.iokit.IOBluetoothUSBDFU 4.0.9f33
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport 4.0.9f33
com.apple.driver.AppleMikeyDriver 2.3.1f2
com.apple.driver.SMCMotionSensor 3.0.2d6
com.apple.driver.AppleSMCLMU 2.0.2d0
com.apple.driver.AppleIntelSNBGraphicsFB 8.0.0
com.apple.driver.AppleMuxControl 3.2.11
com.apple.driver.AppleUSBTCButtons 235.4
com.apple.driver.AppleUSBTCKeyEventDriver 235.4
com.apple.driver.AppleUSBTCKeyboard 235.4
com.apple.driver.AppleIRController 320.15
com.apple.driver.AppleFileSystemDriver 3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 34
com.apple.iokit.SCSITaskUserClient 3.5.1
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage 2.2.2
com.apple.driver.AppleSDXC 1.2.2
com.apple.driver.AppleUSBHub 5.2.5
com.apple.iokit.AppleBCM5701Ethernet 3.2.5b3
com.apple.driver.AppleAHCIPort 2.4.1
com.apple.driver.AirPort.Brcm4331 602.15.22
com.apple.driver.AppleFWOHCI 4.9.6
com.apple.driver.AppleUSBEHCI 5.4.0
com.apple.driver.AppleUSBUHCI 5.2.5
com.apple.driver.AppleEFINVRAM 1.6.1
com.apple.driver.AppleSmartBatteryManager 161.0.0
com.apple.driver.AppleACPIButtons 1.6
com.apple.driver.AppleRTC 1.5
com.apple.driver.AppleHPET 1.7
com.apple.driver.AppleSMBIOS 1.9
com.apple.driver.AppleACPIEC 1.6
com.apple.driver.AppleAPIC 1.6
com.apple.driver.AppleIntelCPUPowerManagementClient 196.0.0
com.apple.nke.applicationfirewall 4.0.39
com.apple.security.quarantine 2
com.apple.driver.AppleIntelCPUPowerManagement 196.0.0
com.apple.driver.DspFuncLib 2.3.1f2
com.apple.iokit.IOAudioFamily 1.8.9fc10
com.apple.kext.OSvKernDSPLib 1.6
com.apple.iokit.IOSurface 86.0.3
com.apple.iokit.IOBluetoothFamily 4.0.9f33
com.apple.driver.AppleThunderboltEDMSink 1.1.8
com.apple.driver.AppleThunderboltEDMSource 1.1.8
com.apple.driver.AppleThunderboltDPOutAdapter 1.8.5
com.apple.driver.AppleHDAController 2.3.1f2
com.apple.iokit.IOHDAFamily 2.3.1f2
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.driver.IOPlatformPluginFamily 5.2.0d16
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport 4.0.9f33
com.apple.driver.AppleSMBusController 1.0.10d0
com.apple.driver.AppleSMBusPCI 1.0.10d0
com.apple.iokit.IOFireWireIP 2.2.5
com.apple.driver.AppleSMC 3.1.4d2
com.apple.driver.AppleGraphicsControl 3.2.11
com.apple.driver.AppleBacklightExpert 1.0.4
com.apple.iokit.IONDRVSupport 2.3.5
com.apple.iokit.IOGraphicsFamily 2.3.5
com.apple.driver.AppleThunderboltDPInAdapter 1.8.5
com.apple.driver.AppleThunderboltDPAdapterFamily 1.8.5
com.apple.driver.AppleThunderboltPCIDownAdapter 1.2.5
com.apple.driver.AppleUSBMultitouch 235.7
com.apple.iokit.IOUSBHIDDriver 5.2.5
com.apple.driver.AppleUSBMergeNub 5.2.5
com.apple.driver.AppleUSBComposite 5.2.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.5.1
com.apple.iokit.IOBDStorageFamily 1.7
com.apple.iokit.IODVDStorageFamily 1.7.1
com.apple.iokit.IOCDStorageFamily 1.7.1
com.apple.iokit.IOAHCISerialATAPI 2.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily 3.5.1
com.apple.driver.AppleThunderboltNHI 1.6.0
com.apple.iokit.IOThunderboltFamily 2.1.1
com.apple.iokit.IOEthernetAVBController 1.0.2b1
com.apple.iokit.IOUSBUserClient 5.2.5
com.apple.iokit.IOAHCIFamily 2.2.1
com.apple.iokit.IO80211Family 500.15
com.apple.iokit.IONetworkingFamily 3.0
com.apple.iokit.IOFireWireFamily 4.5.5
com.apple.iokit.IOUSBFamily 5.4.0
com.apple.driver.AppleEFIRuntime 1.6.1
com.apple.iokit.IOHIDFamily 1.8.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.sandbox 220
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 7
com.apple.driver.DiskImages 344
com.apple.iokit.IOStorageFamily 1.8
com.apple.driver.AppleKeyStore 28.21
com.apple.driver.AppleACPIPlatform 1.6
com.apple.iokit.IOPCIFamily 2.7.1
com.apple.iokit.IOACPIFamily 1.4
com.apple.kec.corecrypto 1.0
Model: MacBookPro8,1, BootROM MBP81.0047.B27, 2 processors, Intel Core i5, 2.4 GHz, 8 GB, SMC 1.68f98
Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 512 MB
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393955353432382D3034302E413031472020
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393955353432382D3034302E413031472020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 (5.106.98.81.22)
Bluetooth: Version 4.0.9f33 10885, 2 service, 11 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: Hitachi HTS545050B9A302, 500,11 GB
Serial ATA Device: MATSHITADVD-R UJ-8A8
USB Device: hub_device, 0x0424 (SMSC), 0x2513, 0xfd100000 / 2
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd110000 / 3
USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x8509, 0xfa200000 / 3
USB Device: hub_device, 0x0424 (SMSC), 0x2513, 0xfa100000 / 2
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 5
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x821a, 0xfa113000 / 7
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0252, 0xfa120000 / 4
Is there a hardware problem?
thank youBefore you upgrade, make sure all your software supports it based on post July, 25, 2012 reports on
http://roaringapps.com/apps:table
Reports prior to this date are unreliable, as they are likely with beta releases of Mountain Lion to developers. Other pitfalls to realize include:
https://discussions.apple.com/docs/DOC-3761
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