Cisco Switches :: Why Does Sx300 Series Only Displays Ping And Traceroute Results In 20ms Intervals
Dec 12, 2011
Why does the sx300 series only displays ping and traceroute results in 20ms intervals (see below)? The example in the CLI manual shows "regular" results. These 20ms intervals are not useful for troubleshooting. This is version 1.1.0.73 on an sf300-24. [code]
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Nov 15, 2011
We have 3 sf-300 series switches in Layer3 mode deployed in different offices. We have found that approximately every 2-3 months at all 3 locations users experience a serious reduction in bandwidth. Only after rebooting the cisco does the problem go away and we're okay for another few months. some setting/feature that may be contributing to this? We are only using several ports and 1 static route on each switch. We are not using any of the bells and whistles on the switch. 2 of the switches are using the original firmware, whereas the other is using the newest firmware. Maybe this is just what we should expect from a Small Business switch?
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Jan 14, 2012
The embedded telnet client is OK but what about a ssh client? It could be a very useful feature for debugging remote servers or network appliances in a secure fashion.
I understand the overhead concerning the image size and CPU usage, but it seems that both the flash memory and the CPU could handle ssh client integration. Naturally, it as to be fully compatible with IPv6 in dual stack enabled environment.
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Dec 4, 2011
I would like to know where can I find the changelog for the 1.1.2.0 firmware.
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May 15, 2012
I'm working as a network engineer for a service provider, and we had just gone through a pretty large scale upgrade throughout our network and service.But not long after the upgrade (or maybe ever since the upgrade, we can't confirm this because we probably missed it out due to many other links to be tested), we met a peculiar problem.Everything seems to be running fine most of the time, but there has been some weird 'ghost-like' activity which have been causing inconsistent network disruptions. At times, certain portions of the network can't communicate with other subnets.And most obviously is the problem with a continuous ping and a traceroute simultaneously. Ping is usually normal, but until a traceroute is attempted, it times out at the same time as tracert fails to obtain the route.Besides, performing a ping from the 2nd closest hop address, 10.250.253.251, which is a cisco layer 3 switch also has problems, the results shown are as belowType escape sequence to abort[CODE]
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Mar 27, 2013
I have a stack of 6 switches and I want to add another over the gbit connector using fiber. I already connected but I can acces the network from the new switch. I don't have any issues on my Stack all resources are available Do I need to do some special setup or connection to enable this? Can be stacked like the others? I already usen the 2 stacking port can i Add another switch?
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Aug 15, 2011
When I ping an address from my windows machine, it succeeds, but when I ping to the same IP on my MAC OS X machine, it fails.
1. Why?
2. How to get successful ping on my MAC machine?
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Aug 21, 2011
How to erase or remove configuration file from ESW 500 Series Switches?
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Mar 26, 2011
My internet is randomly disconnecting every once in a while. It seems to be at random intervals of 30 minutes to two hours. While it is disconnected my modem lights are still on and it says that I am connected to the internet.I am wired directly to a modem from my computer.
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Aug 16, 2011
I just installed this DIR-825 router and when I look for an available network the only one that comes up is the 2.4. No 5.0 at all.
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May 30, 2012
I have a simple ASA, ACS, AD schema for RA VPN authentication. All is working for a few months now, but since the initial deployment we have this connectivty issue regarding ACS and MS AD. At random intervals, 1 month/1 week, the ACS connection status becomes "DISCONNECTED" although the CLI shows that ad client is running. But because of that, no RA VPNs can be authenticated. Clock is not a problem, since it didn't change automatically nor was manually configured prior to the malfunction.
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Jan 27, 2013
our RV220W router has been experiencing random reboots throughout the day, causing a network outage for our local network for the few minutes it takes for the router to start up again. We've seen it reboot at least 5 today alone (and the time is currently just a little over 1pm).I'm having trouble finding the reason for these reboots in the router's logs, although I find these two lines repeating in the error log:
Mon Jan 28 13:20:52 2013(GMT+0100) [rv220w][System][EVTDSPTCH] umiIoctl (18, UMI_CMD_DB_UPDATE(4)) failed. table=dot11STA row=11
Mon Jan 28 13:20:52 2013(GMT+0100) [rv220w][System][PLATFORM] /pfrm2.0/bin/bwLimitConfig /tmp/system.db 18 dot11STA 11 failed. status=-1
I'm not sure why these messages pop up, since we're not using the bandwidth limiter module of the router (granted, we do use QoS profiles to ensure our own LAN is prioritized over the guest VLAN). I'm also not sure whether this is related to the router reboots.
I also find the following repeated line in the warning log:
Mon Jan 28 12:50:50 2013(GMT+0100) [rv220w][Kernel][KERNEL] ERROR:endChantRecv: protocol PNAC returned !OK
The router is currently running on firmware version 1.0.4.17 (latest official release), since we needed support for hairpin connections (as I found out in a previous thread of mine). I've seen the suggestion of downgrading to a previous firmware version in another thread, which has possibly solved it for the poster in that thread, but as we really need the hairpinning support, I don't know which firmware version is safe enough to downgrade it to, if needed.
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Mar 19, 2013
I am working with a client who is adamant their backbone is fine. However, I am unable to get a single iperf connection to generate anything more than 9.5 megabit/s, and can go all the way up to 322 megabit/s with multiple streams before it looks like we are saturated. Note the example below for a single stream has a 1MByte window, with 8kb we were only able to see 2.4 mbits/sec per stream (as seen in the per stream in the example below). Where would you begin to look for why we cant seem to exceed 2.3mbit/s with an 8kb window, or 7.88 with a 1mbyte.
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Oct 20, 2012
I am trying to access a government jobs page to apply for an internship. When I access the page from my home network (using multiple browsers and multiple computers) I get a result that references the job opening from last year, and doesn't have an application button. When I access the site using my 3G connection on my phone, or when accessed from any other internet connection, I get the new page which includes information about the 2013 job opening, and has an application button. When I try to enter the URL for the application page on my home network, I get a 404 error. If I turn my wifi off on my phone and reload the same page, it resolves to the correct page.
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Jan 10, 2011
I did a network test with Passmarks Performancetest. I'm running a 10/100 network with all devices connecting at 100Mb. On Performancetest there are 2 tests to run for Network speed, TCP and UDP. The TCP speed test came back with an average 62000kbps (7.5Mb), and the UDP was 89000kbps (10.8Mb). As I'm running a 100mb network, shouldn't the results of been higher?
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Oct 17, 2012
how to setup 802.1x on the Cisco 500 Series Switches.I have done the whole implamentation in the past with Catalysts and ACS.But would like to see a guide for the 500 series.Do we need the Cisco ACS or can we use RADIUS on Windows?
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May 29, 2012
We are running WLAN using WPA2-enterprise with AES & IAS server.Mostly we are using AP's 1131 and Cisco WLC 4400.I added on a new location 2 AP 1142G and since the installation I got 3-4 clients having regular disconnections.Basically they are connected immediately to the infrastructure but after a certain amount of time the Win7 icon is having this yellow exclamation sign, and we can see that the connectivity is gone (however the IP settings seems to be still in place, but ping or network browsing is not possible).Stopping the WLAN and starting it again solve immediately the issue (via software or via the notebook switch). Normally the problem doesn't resolve by itself.
I was working beside the laptop having the problem with (my own laptop) during the person got 3 disconnections, mine was running like a charm.We have 85% of the people there working errors free.Checked the 1142 AP for any logs or errors, interfaces status etc...Checked the switches behind, interfaces seems running smoothlyChecked IAS / WLC / WCS for any logs that can indicate an issueCompared WLAN adapter settings of the faulty laptop with mine, discovered some differences and adapted it.Compare the WLAN SSID config in Win7 with mine and adapted the slighty differences found.Used WCS troubleshooting client tool.What I will do again :Verify if the persons having the issue have the same laptop modelVerify settings in the BIOS Verify WLAN adapter driver versionVerify BIOS versionUse WCS troubleshooting client tool on my own laptop at this place.
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Aug 28, 2012
I have a Cisco 1800 ISR router running IOS 12.4(22)T5.Clientless SSL VN is configured and working, and has three bookmarks.When logged into Clientless SSL VPN and displaying the portal page in IE-8, the bookmarks are visible and functioning as expected.When logged into Cleintless SSL VPN and displaying the portal page in FireFox-14 or Chrome-21, the bookmarks are not visible.The window for the bookmarks is displayed, but the content (file tree) is not.
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Feb 19, 2012
I have ASA5540 with asa712-k8.bin.
There is a plenty of tunnels ended and it works.But i have one tunnel, which doesn't work.I tried turn on "debug crypto isakmp" and it show this: RECV PACKET from 10.200.79.161 ISAKMP Header. [code]
So there is problem with IPSEC and with no matching SA, but i don't know which one.Then i try to turn on "debug crypto ipsec 255" but it displays nothing. [code]
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Mar 25, 2012
Just setting up and testing a Cisco 891-K9 router. Used CCP for basic setup, figure I'll tweak any settings needed later.For the firewall, I chose the default "medium" security setting in CCP, then added some holes (already setup in NAT) for outside access in.
Now on to the real question:I noticed that I am now unable to click through google search results. On any borwser. Clicking on any search result simply loops back around to the same google search page. If I disable Javascript on the browser, everything works as expected. So it appears that the firewall is preventing something in google's scripts from redirecting and "clicking through" to the final destination page.
I'm familiar with our old Pix firewall commands, but still a relative newcomer to the zone based firewall and commands for this new 891, (relevant Config pasted below) (Gi0 is the WAN interface)
!
!
multilink bundle-name authenticated
parameter-map type protocol-info yahoo-servers
server name scs.msg.yahoo.com
server name scsa.msg.yahoo.com
server name scsb.msg.yahoo.com
[code]....
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Nov 23, 2011
I have a ASA 5505 as a default gateway to a network, whenever I tracert to outside it shows every hop ip address as the ip address I'm trying to get too, quick example
lets say I'm in a 192.168.0.0/25 network but I want to trace to 10.10.10.10
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Jan 18, 2012
I have a WBR-1310 router that for the past few weeks has been giving me 'limited access' issues at psuedo-random intervals. The router functioned perfectly for a long time, I dug it out of storage about 8 months ago, and up until Christmas it was working fine, then both my roommate and I got tablets. Now our router is supporting 6 devices (PS3, 360, lappy, 2 tablets, smartphone) and occasionally more (other peoples phones, roommates laptop once he gets it repaired). However my research online has led me to believe that I should be able to support near unlimited wireless devices on the network (though effectively only around 30). Still, these extra two tablets are the ONLY change to the network that happened immediatly prior to this problem starting.Now I find that when I'm home alone I can go for the whole day with no network issues, but as soon as my roomy gets home and starts to use his devices the network craps out. unplugging the router and modem for 30 seconds fixes the problem temporarily, though the time before it craps out again ranges from hours to minutes.
I CAN plug my lappy into the modem directly when the router is not functioning and still have internet access, so it's definitely the router with the issue.All devices except for the PS3 are using wireless. I've done a hard reset to the router and set it back to factory settings on two occasions, I've changed the SSID and passphrase to get others off the network, I've changed the security type twice, I've tried some suggestions for similiar problems online such as enabling 'gaming mode' on my routers homepage, and setting a custom IP address (I used 10.0.0.1).Over the last 72 hours or so (the problem has existed for a few weeks) I've also received a few messages about my laptop having an IP address conflict; unsure if that is related, but I'm still able to access the internet when I get that message (albeit slower than average) [code] I will update this with another ipconfig the next time my internet dies; which I'm sure will be sometime today.
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Feb 11, 2013
Wired PC randomly disconnects from network at random intervals each dayoday it has done so 3 times. The only way I have found to get it working again is to reset the router which can be inconvenient. When it disconnects all wireless devices continue to work and I have no issues like this with my wired consolesI switched to using a static IP address, since having an automatic one gave me the same results [i have since switched back to automatic]Be happy for any suggestions on how to sort this. I am using W7 OS and I'm using an Orange router. I don't know if its relevant, but when I go to reset my router I have noticed that the download light on my router is flashing like crazy when my PC has disconnected.
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Aug 10, 2011
I have the Qwest/Actiontec Q1000 modem/router. I go to the ip address using my web-browser and open up advanced configurations -> access scheduler. I select a computer (and it automatically adds the MAC address) and then the days/times I want the internet to be accessible. However, when I click "add" (to add my internet allowance to the scheduler list) it just says 12:00 to 0:00, which is essentially permanently blocking the internet for that computer.
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Sep 23, 2011
I'm using an Acer Aspire 5532 and just recently set up my own network with my Cisco WRT120N router. I used the installation disc and set up a WPA password, named my router, and my network. For the installation, it seemed I could not even start without physically linking the router to my laptop with the included rollover cable. I finished that, and ever since my wireless adapter has been disabled. Whenever I attempt to enable it, I get an error; my laptop shuts down and I'm presented with blue screen. The only way I've been able to get back to normal is to reboot in safe mode and than do a system restore.
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Jan 11, 2012
I have 100mbps connection but when i took the test at speedtest.net it was so slow i don't understand whats bottle necking my system. When i download games off of steam it downloads its much faster then downing anything from my browser. I know its my network because when i went on steam and changed my download settings to cable and it was fixed.
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Dec 14, 2011
Looking for Information about Latest IOS Available for switch Series 3560, Guide the latest IOS sopprted Features Specification And Also Guide the Switch Minimum Hardware capacity Require to upgrade with the latest IOS.
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Aug 22, 2011
we are trying to do an automatic backup of our switches config trough snmp.my script can easily backup cisco 2950-2960-3550-3560 using snmp.but I dont know the mib to use to backup the cisco small business serie 300 switches.
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Apr 24, 2013
what the intention behind adding SSH to the SG200 series switches was. Is it to allow SCP copies to and from the switch for configuration and firmware updates OR is it to allow CLI access to the switches.
I have tried to SSH to the switch using PuTTY from Windows and native SSH from Linux/Unix clients, but nothing happens.
Is there some other area of configuration to enable communcation via SSH?
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May 28, 2013
Am I correct in thinking that 200 series swiches now support SNMP using v1.3?
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Apr 24, 2012
I need to allow traceroute traffic through ASA running version 8.0.2.This traffic is natted. what configuration is required on ASA to allow this natted traceroute traffic.Traffic is coming from inside and going outside.Also can we capture this traceroute traffic on asa using capture feature.
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Nov 6, 2011
I have been searching to find out how to allow traceroute from an inside host to an outside IP address. I have found a few articles for IOS versions prior to 8.4 but nothing for 8.4. I can traceroute from the CLI of the 5510 just fine but from a windows host on the inside network all I get is Request timed out
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Feb 28, 2013
I'm trying to block access to dropbox.com on our ASA5510. I have it setup and it blocks dropbox.com just fine. But it is also blocking google.com. I can't figure out why.
Here's my config. When it blocks google, it blocks it with the terminated by inspection engine, reason - disconnected, dropped packet.
regex Block_Dropbox ".dropbox.com"
access-list URL_Filtering extended permit tcp any any eq www
access-list URL_Filtering extended permit tcp any any eq https
[Code]......
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