Why Packet loss increases

Hi,
I implemented a QoS for VoIP purposes and I used ip sla measurements for jitter to observe the changes of jitter and packet loss.
From comparison I have that a jitter is decreased but the packet loss is increased getting worse the MOS and the ICPIF. Why?
I applied the CBWFQ & LLQ on output WAN subinterfaces (ATM).
thanks
Paolo

Try this link for troubleshooting jitter issues
http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a00800945df.shtml

Similar Messages

Increasing Frequency of Packet Loss

Has anyone else been experiencing packet loss more frequently in the last month? I've noticed it a few times when streaming shows or Twitch and lately it's been pretty severe when playing League of Legends.

What state are you located in? Twitch in general has been having tons of issues that they aren't owning up to. I've had a ticket open with them for a month now showing that there is a ton of issues on their end.
However, I have been having issues with packet loss in other games. Mainly with routing through the main Los Angelas Data Center. This started a month ago for me as well. I used to get a latency of 20-30 through the LA Hub. Now it spikes anywhere from 200-300ms after a certain time of day (usually 6:00PM PST). Using ping plotter, I can clearly see that the LA hub is causing most of my issues and later down the route I'm getting 10-20% packet loss in 2 other hubs before I reach the data centers for the game I'm playing.
As a gamer, you'd know the difference between 20ms and 250ms, which is what I feel after 6pm pst. Verizon Support has not owned up that it is their issue so far and the support I've reached out to from the gaming companies can clearly point out that the issue is with the Verizon data center at different hops.
I'm getting annoyed with this and it hasn't been fixed for well over a month.

E4200 Why huge packet loss at Gig but not 100Mbps?

Vista 64 Intel Pro 1000 with latest driver Here is a shot of the lagometer in COD Black Ops when all is good. I used to see this with my old WRT54GS and connected at 100Mbps Full Duplex or Half Duplex and I currently see this when connected through the E4200 at 100Mbps full or half duplex AND when connected via Gigabit via one of the 4 ports on the back of my cable modem, a Motorola SBG6580 [img]http://photos.smugmug.com/1590700194_rFrtpkV-O-LB.jpg[/img] This next screen capture is what happens when I try to connect via Gigabit thru the E4200. It either starts out like this right away or within 30 seconds to a minute this will start to occur. I believe the red spikes indicate packet loss. [img]http://photos.smugmug.com/1590700217_SWKtMP3-O-LB.jpg[/img] .
Solved!
Go to Solution.

It shows the IP address assigned by the ISP that I'm used to seeing.... 24:207:n:n:n:n:n:n .... under the IPv4 info.
I also have IPv6 enabled and I notice under those listings just.... 0:0:0:0:0:0:0:0 ....which is what I'd expect if IPv6 is not yet in use by by ISP.
I've been running a lot of other tests here with various configurations including substituting my old WRT54GS for the E4200. I currently have several devices off an 8 port Gig unmanaged switch and all is fine as long as I have my Intel Pro 1000 NIC set to 100Mbps full or half duplex moe. If I set it to 1000Mbps and connect it via the 8 port hub or the ports off the back of the E4200, soon after the E4200 starts to go wierd for all systems connected. Running Speedtest.org shows a huge increse in ping if I'm lucky enough to get the page to load that far. It does not seem to make any difference that my laptop connects reliably via Gig, just the PC with the Intel card. I've gone out and bought a new Intel Pro 1000 and will stick that in later this evening.
Thanks for your replies btw.

Increased Packet Loss...

I've had a number of complaints from the kids in May about games have frequent issues, and I've experienced some odd issues off and on as well. When I got the May report from SamKnows, I noticed that packet loss since early May has been unacceptably high with more than 10 days during the month of packet loss in excess of 2.5% (as high as 6.5%), and the first few days in June are looking just as bad (all above 2.5%). This would definitely be the root cause of the kids problems with the games as well as the issues I've observed. Generally, 2.5% to 5% is considered poor network performance and 5% to 12% is very poor network performance, so this is not really acceptable.
I verified with older SamKnows reports that prior months didn't have these issues (maybe once or twice a month, but most months didn't have notable packet loss days at all).
Anybody have any ideas as to what is going on? Does Verizon Tech Support look at this boards and investigate issues like this, or do I need to call them?

I will try digging deeper, but for it to suddenly get worse like that at such a consistent level at this point is almost certainly not the internet in general.

WIFI Packet Loss/Jitter MacBook Air 11 & LION OSX 10.7.1

I started using computers more than 30 years ago when I was 5, I had my first IBM PC at the age of 10 and have never had any interest in paying over the odds for an Apple mac mainly because I saw the Mac as a kind of "Can't open nothing", one mouse buttoned retard of the computer world.
That is, until now.
I set up an online business 3 years ago and rented a dedicated server and set the whole business up in a cloud, so to speak. Having done that, all I needed a laptop for was a remote desktop connection and to run a SIP phone (Internet phone).
My PC based laptops had almost nothing installed on them, and I wasn't using software on the laptop itself, I was using remote desktop, so - why not try a MAC? The new Macbook Air 11 is small, light and made of metal and glass so should be robust enough to travel with me.
I have to say, this was the worst move I've ever made.
I opened the new shiny macbook and the first thing I noticed was that the internet seemed hit and miss. Moving around the room I managed to find a spot whereby pages woud load quickly. Strange, my £200 acer laptop was sh.t fast everywhere in the house. No matter, I packed it back away and carried on working on the Windows machine.
I've come to Newquay this week, and i've started to try and use the Macbook again in a hotel. The wireless signal in the room is low, and speedtest shows about 1 meg down and 3/4 meg up. That may sound bad to you, but remote desktop uses about 5k/sec (modem dial up speed) and the softphone, well, my Asterisk VOIP setup is confugured to use the GSM codec so that's 8k/sec each way + overheads.
This whole setup was deliberately designed to be "thin" so I can travel with ease and work on bad connections like USB internet sticks.
Anyhow, the Macbook was unable to hold a stable connection to the remote desktop or SIP phone, even though the speed test showed a whopping 1 meg up and down. What you may not be aware of is that there is more to a connection than the speed, there is the quality as well. How many packets are lost / how much "jitter" is on the line.
Anyhow, we're not living in the 3rd world, I ran a PINGTEST and it showed a small amount of jitter but told me the line was class B, online games may suffer but voip should be fine.
I unpacked the Acer, placed it in exactly the same spot as the Apple had sat in and it worked beautifully with 1 bar of wireless signal, all day long. Phone calls were clear.
So you know now what I'm thinking. I'm sitting here with my £200 acer because I can't use the £1500 macbook air 11. I paid nearly sixteen hundred pounds for this piece of .... and it doesn't ...... work. Time to contact Apple support.
2nd Mistake!
Representitive 1: - Told me that I can't compare the Macbook Air to the Acer, the Acer has Google Chrome and everybody knows Google Chrome is the fastest browser. I was told there was nothing more he could do, its probably a bad line at the hotel. When I explained the Acer works fine for voip I was told well, maybe it is getting a better signal. I explained the Acer has the cheapest possible parts inside it and paid 1500 for this macbook, expecting it to have quality parts inside and was told I'd paid for the size, because its so small but its not considered "powerful". Apple do you train your staff? Clearly not.
Thank god I wasn't paying to talk to this moron.
Representitive 2: - Had no idea what packet loss or Jitter was, got me to do a speedtest and said that looks fine. Then he got me to remove the WIFI adapter and re add it in the network settings.
Guess what, nothing changed, its still the same hardware and software.
Representitive 3: - Still not really understanding "quality" issues with the networking interface, I was asked to install the latest Java client. I did it, only because I wanted to comply with Apples wishes so they'd help me, but they weren't helping and Java has nothing to do with the network adapter, so that was useless advice too.
Apple seem to have no idea there is a problem, even though Google has pages and pages of people saying the same as me, and their own discussion forums have thousands of people complaining https://discussions.apple.com/thread/2664670?start=0&tstart=0
Finally, late yesterday whilst speaking to d.ck head number 3 at Apple support, we found a forum post talking about a fix, 10.7.1 update. I told d. head number 3 about the update and he suggested I applied it. So I did and everything looked great, for a whole evening.
This morning, I switched on again and the same thing, slow remote desktop, choppy unusable phone. Remember the phone needs less than 20k for a conversation, thats 0.2 meg. Speedtest again showing a whole meg both ways.
I called apple support again, this time being a little forceful, and I've asked for this to be escalated, but the bottom line is - they have no fix, they don't aknowledge this as a problem and I was told LION is new, so maybe it's got a bug..
I told the guy on the phone this is a network driver issue, the intermittency of the problem shows that and the Apple's lack of settings for the network adapter means the unit is autonegotiating with the router and choosing speed and duplex settings on its own. Sometimes it does that correctly, other times not and the connection although fast has a lot of noise / packet loss / corruption.
I've found a workaround, you put the unit to sleep and wake it up again and it runs fast until the next shutdown. Not really acceptable seeing as I was paying for "the cream of the crop".
I will definately not be recommending Apple products, and i'll certainly not be replacing the Windows laptops in my business with Apple's toytown system- i'd go out of business if I had to rely on this.
All there is left now, is to look at Boot camp and see if I can wipe this waste of space linux hack from the unit and install Windows 7.

I started using computers more than 30 years ago when I was 5, I had my first IBM PC at the age of 10 and have never had any interest in paying over the odds for an Apple mac mainly because I saw the Mac as a kind of "Can't open nothing", one mouse buttoned retard of the computer world.
That is, until now.
I set up an online business 3 years ago and rented a dedicated server and set the whole business up in a cloud, so to speak. Having done that, all I needed a laptop for was a remote desktop connection and to run a SIP phone (Internet phone).
My PC based laptops had almost nothing installed on them, and I wasn't using software on the laptop itself, I was using remote desktop, so - why not try a MAC? The new Macbook Air 11 is small, light and made of metal and glass so should be robust enough to travel with me.
I have to say, this was the worst move I've ever made.
I opened the new shiny macbook and the first thing I noticed was that the internet seemed hit and miss. Moving around the room I managed to find a spot whereby pages woud load quickly. Strange, my £200 acer laptop was sh.t fast everywhere in the house. No matter, I packed it back away and carried on working on the Windows machine.
I've come to Newquay this week, and i've started to try and use the Macbook again in a hotel. The wireless signal in the room is low, and speedtest shows about 1 meg down and 3/4 meg up. That may sound bad to you, but remote desktop uses about 5k/sec (modem dial up speed) and the softphone, well, my Asterisk VOIP setup is confugured to use the GSM codec so that's 8k/sec each way + overheads.
This whole setup was deliberately designed to be "thin" so I can travel with ease and work on bad connections like USB internet sticks.
Anyhow, the Macbook was unable to hold a stable connection to the remote desktop or SIP phone, even though the speed test showed a whopping 1 meg up and down. What you may not be aware of is that there is more to a connection than the speed, there is the quality as well. How many packets are lost / how much "jitter" is on the line.
Anyhow, we're not living in the 3rd world, I ran a PINGTEST and it showed a small amount of jitter but told me the line was class B, online games may suffer but voip should be fine.
I unpacked the Acer, placed it in exactly the same spot as the Apple had sat in and it worked beautifully with 1 bar of wireless signal, all day long. Phone calls were clear.
So you know now what I'm thinking. I'm sitting here with my £200 acer because I can't use the £1500 macbook air 11. I paid nearly sixteen hundred pounds for this piece of .... and it doesn't ...... work. Time to contact Apple support.
2nd Mistake!
Representitive 1: - Told me that I can't compare the Macbook Air to the Acer, the Acer has Google Chrome and everybody knows Google Chrome is the fastest browser. I was told there was nothing more he could do, its probably a bad line at the hotel. When I explained the Acer works fine for voip I was told well, maybe it is getting a better signal. I explained the Acer has the cheapest possible parts inside it and paid 1500 for this macbook, expecting it to have quality parts inside and was told I'd paid for the size, because its so small but its not considered "powerful". Apple do you train your staff? Clearly not.
Thank god I wasn't paying to talk to this moron.
Representitive 2: - Had no idea what packet loss or Jitter was, got me to do a speedtest and said that looks fine. Then he got me to remove the WIFI adapter and re add it in the network settings.
Guess what, nothing changed, its still the same hardware and software.
Representitive 3: - Still not really understanding "quality" issues with the networking interface, I was asked to install the latest Java client. I did it, only because I wanted to comply with Apples wishes so they'd help me, but they weren't helping and Java has nothing to do with the network adapter, so that was useless advice too.
Apple seem to have no idea there is a problem, even though Google has pages and pages of people saying the same as me, and their own discussion forums have thousands of people complaining https://discussions.apple.com/thread/2664670?start=0&tstart=0
Finally, late yesterday whilst speaking to d.ck head number 3 at Apple support, we found a forum post talking about a fix, 10.7.1 update. I told d. head number 3 about the update and he suggested I applied it. So I did and everything looked great, for a whole evening.
This morning, I switched on again and the same thing, slow remote desktop, choppy unusable phone. Remember the phone needs less than 20k for a conversation, thats 0.2 meg. Speedtest again showing a whole meg both ways.
I called apple support again, this time being a little forceful, and I've asked for this to be escalated, but the bottom line is - they have no fix, they don't aknowledge this as a problem and I was told LION is new, so maybe it's got a bug..
I told the guy on the phone this is a network driver issue, the intermittency of the problem shows that and the Apple's lack of settings for the network adapter means the unit is autonegotiating with the router and choosing speed and duplex settings on its own. Sometimes it does that correctly, other times not and the connection although fast has a lot of noise / packet loss / corruption.
I've found a workaround, you put the unit to sleep and wake it up again and it runs fast until the next shutdown. Not really acceptable seeing as I was paying for "the cream of the crop".
I will definately not be recommending Apple products, and i'll certainly not be replacing the Windows laptops in my business with Apple's toytown system- i'd go out of business if I had to rely on this.
All there is left now, is to look at Boot camp and see if I can wipe this waste of space linux hack from the unit and install Windows 7.

A strange packet loss in a switching environment.

I have a switching environment with four switches as the diagram showing below. SW1 and SW2 are two Cisco 6509-E switches, SW3 and SW4 are two Cisco 4848E switches, Host 1 and Host 2 are Solaris servers.
The original issue reported was that the SSH session between two servers were not be able to established. Tcpdump result on the servers indicated there was packet loss in the network. Instead of randomly lost some of the packets, only specific packets were lost in the network.
When running ssh server on Host2 and running ssh client on Host1, the Diff-Hellman Key Exchange Reply packet from Host2 to Host1 was lost.
When running ssh server on Host1 and running ssh client on Host2, the Diff-Hellman GEX Init pakcet from Host2 to Host1 was lost.
There are no ACL configured on the switch interfaces.
The packet loss seems targeted for Diff-Hellman related packets, which is really weird. Does any one know why it happened?

I work with the individual reporting this issue and turns out a bad line card on the 6509-E where these 4948e access switches trunk to is the ultimate root cause. I don't believe there were any syslog or other indicators of the failure and it was semi-masked by the fallout being dependent on where the VLAN roots were homed so it wasn't consistent. Ultimately when the VLAN roots were reviewed in-depth, it did make complete sense on the impact being seen on just some access switches and ports and not others.
I believe I've written up all the pertinent facts here or perhaps left a few out and they will be filled in or corrected later.

Packet loss when flood pinging a Mac

I had some trouble transferring large files between my iMac and my MBP the other day and so started a bit of investigation. Mistake really - here is what I found:
All mac targets are running up-to-date Leopard and use intel processors.
The home network has a linksys wireless router - all devices connected by copper.
flood ping tests with command 'sudo ping -f <target>:
from iMac to MBP shows 30% packet loss
from MBP tp iMac shows 33% packet loss
from iMac to windows laptop 0% packet loss
from iMac to linksys router 0% packet loss
from iMac to Freecom NAS box 0% packet loss
from MBP to windows laptop 0% packet loss
from MBP to linksys router 0% packet loss
from MBP to Freecom NAS box 0% packet loss
I took the macbook to work and picked targets on another site, several busy switch hops away.
from MBP to windows desktop 0% packet loss
from MBP to another iMac 26% packet loss
from MBP to mac mini 28% packet loss
from MBP to linux server 0% packet loss
from linux server to MBP 32% packet loss
The firewall is off on all the targets.
Seem clear enough - Mac machines can't handle high ping loads. It is no good telling me they don't have to. If they can answer a ping at all, they should be able to handle the load. It is a perfectly acceptable way of stress testing the link. File transfers are generally not an issue but now I want to know...
Why can't the macs handle the ping floods?
Is this indicative of any other weakness in the IP stack?
Pete

I had a suspicion of packet loss on my internet connection but could not be certain it was the ISP at fault. The fact that I had been having trouble transferring large files between my machines led me to look for possible local problems.
Network fault finding should always examine the hardware first so I wanted to see if there was anything about the cabling or the router which might be causing packet loss.
Actually copying data about the network is a pretty poor way to test things because you have several additional layer of complexity that can colour the results.
When I had narrowed down the flood ping packet loss to the macs, I went hunting on the 'net. There were plenty of people who were reporting various kinds of packet loss. Enough of them that I wondered if there was something more to it. Some of them were talking about similar symptoms to mine. The respondents usually answered a question other than the one asked so I thought I would put up some tests and see if there was actually a problem anywhere.
Now I know it is a 'feature' rather than a fault, I can work around it.
Thanks anyway
Pete

White noise, sort of packet loss when talking with...

Hi,
For some unknown reason when I talk with one specific person the call doesn't exactly drop out it sort of cuts the audio and gives me white noise (sort of like when you get packet loss when transferring files or gaming), I have 0 idea why it does it. Does it the reverse as well, but only for me and this person. Everyone else thats in the call doesn't get effected and its frustrating me.

When in a call goto call > Technical info. This will show you various info about the call connection (and a lot of useless info aswell). Amongst the info is packet loss, and relays (if relays = more than 0 you are not directly connected).
Being on the same Skype, version might help.

Wifi packet loss after upgrading to 10.7.4

After upgrading all three macs (mb pro, mb air, imac) in the house to 10.7.4 they all experience wifi packet loss. I ping to the local router. I have connected to a multitude of wireless routers with similar result.
But here is strong evidence that is a the OS X software problem. I am running linux inside of vmware fusion. I have run the exact same ping commands simultaneously in (1) mac and (2) vmware linux. The linux ping experiences zero packet loss, not even a single packet. The mac at its best will lose 1% packets, but can increase beyond that.
We are suffering from slow internet in our corrent location as it is, and this has a noticable impact on our performance. I am a bit afraid to upgrade to Mountain Lion for fear it may be even worse.
Any thoughts?

Your
com.apple.systempreferences.plist
file is likely corrupt in your
(use the Finder > Go > Go To folder and paste & Go)
~/Library/Preferences
folder, Trash the flle you can (may be two of them, one is a lock file) and reboot.
Reset your system preferences again.
Also see OnyX here: It has a plist checker for corruption
Step by Step to fix your Mac

Help- WDS with Extreme-N & 2x Airport Express with ~ 40% packet loss

So this problem is driving me crazy. I recently moved into a house that has enough metal in the walls (don't ask) to prevent me from using a single base station so I expanded my network as a WDS utilizing an Airport Extreme (mixed NGB mode) and two Airport Express (one as a relay and one as remote). The configuration appears to work normally some times but other times (especially evenings) I get a very high rate of dropped packets between the client notes (which are connected through the WDS-enabled Expresses) and the base station (using a simple ping 10.0.1.1 to check connectivity to the APBS-N). The problem manifests itself from a users' perspective as very long DNS lookups which causes slow page loads in a browser but it's very reproducible via ping.
So far I've tried changing the channels on the network but I haven't seen a huge payoff there. iStumbler reports no additional networks on channel 2 which I'm using, there are some on channel 1, 5, and 13. I've also tried channels 7 and 11. We have no microwave in the house and our cordless phone (5.8ghz) never interrupted with our simpler Express-based network at our old house, n/m the fact that the phone is never in use when we have this problem.
I don't seem to see the problem when I'm local to (in the same room as) the AEBS; it really seems to happen only when I'm on the WDS-enabled remote and/or relay.
Other data points that may help are that the AEBS-N drops out of the Airport utility at the same time. Sometimes isn't gone for 30 seconds, other times for > 30 minutes. The other base stations continue to report "Green" in that they are not having any WDS problems. If I disconnect the remote node the relay will correctly reflect a status of yellow, so I know it somewhat works.
It's an open network (no encryption, open SSID) so it's unlikely that there's an issue there.
Clients include an Apple TV, iBook G4, MacBook, Tivo Series 3, Intel Mini and Dell Latitude D810. Because of the diversity of clients I don't think it's a driver or NIC adapter issue on any of the clients.
Does anyone have any experience working in a similar environment? Suggestions on troubleshooting packet loss (or other performance issues) in a WDS network?
Thanks,
Mike

Hello errorsupply. Welcome to the Apple Discussions!
I suggest downloading a copy of iStumbler. Use iStumbler's Inspector feature (select Edit > Inspector from iStumbler's menu) to determine the Signal-to-Noise Ratio (SNR) at different points around your house, by performing a simple RF site survey. Within the Inspector, note the values for "signal" & "noise" at these locations. Start with your MacBook near the main base station, note the readings, and then, choose the locations where you have the relay and remote base stations.
SNR is the signal level (in dBm) minus the noise level (in dBm). For example, a signal level of -53dBm measured near an access point and typical noise level of -90dBm yields a SNR of 37dB, a healthy value for wireless LANs.
The SNR, as measured from the MacBook, decreases as the range to the base station increases because of applicable free space loss. Also an increase in RF interference from microwave ovens and cordless phones, which increases the noise level, also decreases SNR.
SNR Guideline
o 40dB+ SNR = Excellent signal
o 25dB to 40dB SNR = Very good signal
o 15dB to 25dB SNR = Low signal
o 10dB to 15dB SNR = Very low signal
o 5dB to 10dB SNR = No signal
If the SNR is 20dB+ at each of these locations, then you should be getting reasonable performance from your AirPorts. If less, either try to locate/eliminate the source of the Wi-Fi interference or try relocating the relay and/or remote base station until they are within a 20dB SNR range of the main (and for the remote, of the relay).

Different filesize after transmission with packet loss

HI!
I'm simulating packet loss on audio streams which are transferred over a network by using the JMF.
I'm doing the following:
read audio-WAVE file --> transcode into DVI for instance and sending --> generating packet loss --> transmitting over RTP to remote device --> receiving and saving in WAVE-file (linear format)
Now I'm wondering, why the size of the WAVE file on the receiver side is lesser than the size of the file of the sender side (about the amount of created packet loss in percent ). I think they have to be the same. If I play the received files in an audioplayer, the duration is logically the same, too. For each lost packet, JMF has to put a "silence" sample within the audio stream data. So this results in the same amount of samples and WAVE-file size.
Can someony explain me, why do the files have a different size ?
stefan

HI!
I'm simulating packet loss on audio streams which are transferred over a network by using the JMF.
I'm doing the following:
read audio-WAVE file --> transcode into DVI for instance and sending --> generating packet loss --> transmitting over RTP to remote device --> receiving and saving in WAVE-file (linear format)
Now I'm wondering, why the size of the WAVE file on the receiver side is lesser than the size of the file of the sender side (about the amount of created packet loss in percent ). I think they have to be the same. If I play the received files in an audioplayer, the duration is logically the same, too. For each lost packet, JMF has to put a "silence" sample within the audio stream data. So this results in the same amount of samples and WAVE-file size.
Can someony explain me, why do the files have a different size ?
stefan

Packet loss, full strength connection

So, just recently I have found that my connection to webpages times out. In firefox i will get the can't connect to site page, then i press try again and usually it works. When I use terminal and ping www.apple.com for example i will get ping times of 900ms and then maybe 80ms, after 15 pings i will get a report saying i have packet loss between 15 and 25%. Does anyone have any ideas why this is happening? It's totally out of the blue. I'm using a D-link DIR-625 wireless N router. I've never had these problems before. My Windows pc that is connected wirelessly to the router has no problems connecting to any pages.

May be a bit late, but I have found this tool to be helpful with diagnosing my wireless network faults :
AP Grapher - http://www.chimoosoft.com/
I have all sorts of problems with my wireless. Even things like someone opening the sliding door can cause my network to drop out. If as you say this is a recent problem, have you recently purchased cordless phones? Well check the tool and see if there is any noise coming across on the signal and try and work back from there.

Packet Loss frequently for a week?

Hello all, I am currently experiencing a massive amount of packet loss throughout various devices in my household. The main issues are with my SmartTV and the HuluPlus/HBO GO applications. After running my own tests, I have noticed that I am experiencing a whoping 38% packet loss to Hulu and HBO, and a regular 15% loss with any website on my PC and while gaming. Several hours with Verizon has not helped solve the issue and it is becoming increasingly frustrating. Anyone else experiencing this issue?

I would start by checking your local connection.
Run to speedtest.verizon.net
That will test your connection to the Verizon network.
Try and do it when you notice the issues.
If that doesn't give you the speed you are paying for, Verizon should be able to use that to help troubleshoot.
If it passes, that means it could be in Verizon network or farhter down the line.
If a forum member gives an answer you like, give them the Kudos they deserve. If a member gives you the answer to your question, mark the answer as Accepted Solution so others can see the solution to the problem.

ME3600 packet loss problem - reboot to fix.

One of our ME3600 units has developed a problem where we would lose IPv6 Neighbours and OSPFv3 neighbours, followed by the device not passing MPLS traffic. IPv4 traffic suffering bad packet loss.
I discovered that devices attached to the Gigabit ports were receiving errored frames so the ME3600 seemed to be sending out bad frames.
rebooting the device would fix it for a while but it kept happening at regular intervals, usually when the box was carrying more ipv6 traffic.
We have upgraded to the latest firmware which did not help, and performed a full hardware replacement from Cisco only to find we are still seeing the same issue!
there was no configuration change that I could point as being a catalyst for the problem, the most recent thing was enabling ipv6 VRFs, but IPv6 is also carried in the global table while we move some services around.po
Has anyone else experienced similar problems with the ME3600?

This sounds very similar to a problem we have seen across multiple boxes.
I've not noticed whether OSPFv3 neighcors drop, however have seen MPLS stop forwarding and heavy v4 loss. Control plane for v4 seems to stay up (ie v4 OSPF neighbors keep their adjacany) so routes still advertised etc. Performing a shut / no shut of one of the core interfaces will generally result in a complete failure of the interfaces on that ASIC (the two 10G ports in our case) - can't ping adjacent devices after the no shut, but the GE ports still work.
10G ports are core facing on our boxes, and adjacent neighbors see increasing input errors when the issue occurs.
Issue has only been seen during peak traffic times. Reboot fixes the problem.
Did you find any resolution? We've been pointed at CSCui23725, and advised to use the command "platform acl egress-disable". This appears to be working so far.

EEM- Email alert with IP SLA Based on Packet Loss

hi joseph,
i need your advise, i want to get alert email based on IP SLA Packet loss
the scenarion as below :
1. If the traffic hit threshold packet loss greater than 20% as long 15 minutes --> send email
2. If reset condition packet loss eq 0% as long 15 minutes --> send email again
I don't know how to configure it condition. could you help me to verify my configuration below?
ip sla logging traps
ip sla 1
icmp-jitter 10.216.0.105 source-ip 10.216.0.107 num-packets 100 interval 40
frequency 50
ip sla schedule 1 life forever start-time now
ip sla reaction-configuration 1 react Packetloss threshold-value 3 1 threshold-type immediate action-type trapOnly
ip sla enable reaction-alerts
event manager applet TEST
event syslog pattern "IP SLAs$1$: Threshold exceeded"
action 2.0 mail server "10.240.0.10" to "[email protected]" from "[email protected]" subject "Alert for Intermittent Link" body "link intermittent in x %"
thank you

What's you have could work with a few modifications. First, increase that threshold-value of 3 to 20. You can leave the falling threshold value of 1. You'll need to add another applet to match the falling threshold syslog message. Not sure exactly what that one will look like.
The first applet will look like this:
event manager environment q "
event manager applet ipsla-threshold-exceeded
event syslog pattern "IP SLAs$1$: Threshold exceeded"
action 001 cli command "enable"
action 002 cli command "config t"
action 003 cli command "no event manager applet ipsla-healthy"
action 004 cli command "event manager applet ipsla-unhealthy"
action 005 cli command "event timer countdown time 900"
action 006 cli command "action 1.0 mail server $q 10.240.0.10$q to $q [email protected]$q from $q [email protected]$q subject $q Alert for Intermittent Link$q body $q link intermittent in 20 %$q"
action 007 cli command "action 2.0 cli command enable"
action 008 cli command "action 3.0 cli command $q config t$q"
action 009 cli command "action 4.0 cli command $q no event manager applet ipsla-unhealthy$q"
action 010 cli command "action 5.0 cli command end"
action 011 cli command "end"
And the second applet (the one where you'll need to fill in the appropriate syslog pattern) will look like:
event manager applet ipsla-threshold-normal
event syslog pattern "FALLING THRESHOLD PATTERN HERE"
action 001 cli command "enable"
action 002 cli command "config t"
action 003 cli command "no event manager applet ipsla-unhealthy"
action 004 cli command "event manager applet ipsla-healthy"
action 005 cli command "event timer countdown time 900"
action 006 cli command "action 1.0 mail server $q 10.240.0.10$q to $q [email protected]$q from $q [email protected]$q subject $q Link is stable$q body $q Link has been stable for 15 minutes$q"
action 007 cli command "action 2.0 cli command enable"
action 008 cli command "action 3.0 cli command $q config t$q"
action 009 cli command "action 4.0 cli command $q no event manager applet ipsla-healthy$q"
action 010 cli command "action 5.0 cli command end"
action 011 cli command "end"

Why Packet loss increases

Similar Messages

Maybe you are looking for