Cisco :: 1252s And PoE - APs Drop Off Network
May 8, 2013
We've had Cisco 1252 APs running on PoE (3750E gives the port 20W of power) for well over 3 years with no problems. These have not been touched, moved or configured since they went in.
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All of sudden we're seeing these APs drop off the network and investigations reveal that they show as IEEE PD when you do a show power inline.
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Some of these are slated to be replaced after the ports were changed, the cables replaced and port reset (also an old spare 1252 was inserted in to one of these ports and it came up fine, indicating an issue with these APs).
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If it was one or two then maybe I could believe that the APs are at fault, but with so many (10 so far) I'm struggling to believe it. Could it be the code we are running on the switches? We are running 12.2(50)SE3.
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May 22, 2012
I need to upgrade several 1252s from autonomous to LWAPP. I have not been able to find the upgrade tool for 1250s or instructions for CLI upgrade. I wil be using NCS to do final configuration once the APs come online.
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Jan 12, 2012
I've recently just moved house and we got Virgin Media 50mgs broadband installed with their wireless super hub which is also a Netgear product.However I first noticed up in my room I have weak signal on my wireless devices I have my Dell laptop, xbox 360 and desktop pc with wifi card.I researched this and went out and bought a Netgear wireless extender:
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Now this does work it gives me excellent signal but it keeps dropping the connection which is extremely frustrating when playing the xbox or on an online game on the pc.I contacted Netgear and all they suggested was updating the firmware
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Jun 4, 2012
I currently have an issue with the wireless internet at home whilst watching videos, playing online games, completing homework etc... On the computers working over the wireless network there seems to be a randomly occurring drop out of the internet. My home network connection looks to be solid, but the internet drops out for around 5-10 seconds and then comes back.Here is a screenshot from Xirrus the wifi inspector program from the pc in my room connected via the network:[URL]The home network (Munasinghe and family) had a signal of -78 dBm.The second signal, Optus (name of ISP) wifi had a signal of -85 dBm. This signal value often decreases or disappears altogether.
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Mar 15, 2011
Up until recently (4 months ago) my network was fine. However, all of a sudden the network began to drop randomly. Now, the network drops about every 30 mins. Its quite an inconvenience, especially as there are two laptops, a desktop and 2 games consoles running off of the network (not all at once though). I have a Belkin Wireless G Plus MIMO router.
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May 17, 2012
I have a Lenovo T420 with a Intel Centrino Advanced-N 6205 wireless network card that causes me some headache. It randomly gets disconnected from my router (Zyxel P-2601HN-F1) and home network, works fine though if i using cable. Right after it gets disconnected it reconnects and works fine until it gets disconnected again. I have an HP laptop connected at the same time and no problems there.It works fine in the network in our office (work laptop). I tried our IT dept but they were clueless and told me I had to figure it out by myself, as it works in the office..
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Sep 15, 2012
As per CISCO QoS document URL, IOS from 12.2(13)T support drop command in policy map. But our CISCO ASR 1013 having IOS of Version 15.2(1)S1 doesn't have drop syntax.How can we drop specific application using QoS in ASR 1013 of IOS version 15.2 and higher?,Can I allow few users for a particular application (like P2P) and drop other users based on users source IP?
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May 22, 2012
I having a basic query in troubleshooting E1 link , here im facing packet drop in the link and we are testing by providing local loop and remote loop from the CSU/DSU at local point and at remote point . I have tried ping test while the loop is given at local point and remote point ie i have pinged my local serial interface IP address (eg 10.0.0.1 -local & 10.0.0.2 -remote ) in Remote Loop i could see no errors and drops and also the traffic on the interface output and input is the same(eg input rate 1000bps and output rate 1000bps) .My query is that when i am pinging the local interface IP does the icmp packet travels till the loop point and comes to the same interface(like a boomerang) .
ICMP packet
   ->->->->->->->->->->->->->->->              Â
R1Â Â Â Â Â Â Â Â Local CSU/DSUÂ Â Â Â Â Â Â Â Â Â Â Â |Â Remote CSU/DSU (remote loop given )
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O-----------O------------------------------O |--------------------------------------O R2
   <-<-<-<-<-<-<-<-<-<-<-<-<-<-<-|
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Jul 18, 2011
my Cisco anyconnect VPN clients are able to access all of my internal networks accept to another site which has a IPSEC VPN site-to-site. The Cisco ASA forwards the packets destined to this remote site to a Cisco router which NATS the source addresses (pool 10.17.252.0/24) to a 192.168.46.0 range. The remote network is 155.x.x.x which I have included in my internal subnets object-group and added a route on the ASA to route it inside.
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I have configured NAT so that it does not NAT anything from the anyconnect client range to the internal subnets. I am using version 8.3(2) and the NAT rule is:
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nat (outside,inside) source static SSLPOOL SSLPOOL destination static INSIDE_NETS INSIDE_NETS
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I can still not connect to the remote side via the VPN; when I run this throught packet-tracer, I get a failure on phase 6:
Type: WEBVPN-SVC
Subtype: in
Result: DROP
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Result:Drop reason: (acl-drop) Flow is denied by configured rule
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I cant seem to work out what it is that is blocking it. The NAT rule above is rule 1 in case some other NAT rule is causing the issue..
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Apr 2, 2012
i see that the wifi on the SRP Freezes. If i am connected via lan, i can still surf the net or connect to another access point on the network and surf. But the wiress devides connected to the SRP loose connectivity even though it shows that the wifi connection is connected. I am running on the latest firmware. this problem has started occcuring only recently
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Feb 4, 2013
IXIA----DUT-----IXIA
| | |
|_______ |________|
DUT has redudant connections to IXIA. Im pumping traffic from IXIA and traffic takes PATH A .. When I shut PATH A, i expect traffic to shift to PATH B within 100ms (example). How do I test this ?
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Jan 30, 2013
I have a problem with configuring of my vwic3-2mft-t1/e1 card on Cisco 2821 router. I need drop some raw data timeslots from E1 frame and then insert them into frame on other port. I enter the following commands:
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card type e1 0 0
 controller e1 0/0/0
tdm-group 0 timeslots 1-4
clock source line
 controller e1 0/0/1
tdm-group 2 timeslots 1-4
[code]....
I find these commands in Cisco 1 and 2-port T1/E1 Multiflex Voice/WAN Interface Cards for the Cisco 1700 Series Router configuration guide for vwic2 cards.But this config is not working properly. show connect output is showing status of connection "UP", show controller e1 shows no errors on both e1 ports, but data not flows between ports.What am I doing wrong? Have vwic3 and vwic2 cards different configuration procedures or not?
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Sep 11, 2012
I have a working configuration with a 2811 router at my remote site in which I take the T1 (point-to-point PRI) into port 0/0/0 on the dual-port vwic2-mft-t1/e1 card. Then I plug my PBX into the 0/0/1 port. I channelize the T1 so 1/2 of the channels are used for data (13-24) and channels 1-8 are passed through the vwic2 to the PBX. I'm using the connect tdm t1 0/0/0 0 t1 0/0/1 0 command to pass the voice calls through to the PBX.
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I tried to upgrade the router to a 2911 with the same card and the same configuration copied and pasted over and as soon as I put the connect tdm t1 0/0/0 0 t1 0/0/1 0 statement in, I drop the data side of the T1 and lose my connection to the WAN. If I take the command back out, the WAN still doesn't come back up until I reboot the router.
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Has the syntax changed? I have a case open with TAC but so far no luck, as they can't seem to figure out which group should take this case, voice or data..
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Nov 10, 2011
ASA 5510 running without issues for a while but we needed extra port so added a 4GE SSM.
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Having installed the 4GE SSM we had some issues with the card not liking a connection to our switches and only working by plugging directly from the server into the firewall, not great as we wanted extra servers on the line in the future. So we upgraded the firmware and no are at an impasse.
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We have upgraded to 8.0(4)3 and now we cannot get any traffic through the port, we can't even connect to an external DNS server. Running a packet trace I get an immediate error on the first step '(l2_acl) FP L2 rule drop', and it appears as though the outside connection is down.
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I have some experience on setting up basic port forwarding and NAT for internet access, webservers, mail but this has thrown me.Â
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Jan 9, 2012
I verified that the VPN implemented between a static IP address and a dynamic IP address every time the GPRS router IP address change address, the VPN does not rise.
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I attach the configuration implemented by ASA5505 dynamic side.How can I fix it?
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: Saved
: Written by enable_15 at 06:45:34.029 UTC Sat Dec 3 2011
!
ASA Version 8.2(1)
!
hostname ASA2
[code]...
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Jan 24, 2011
This is not a problem I would not have noticed save for starting to use Skype. Every 10 to 20 minutes, my internet drops out. This occurs whether my laptop is connected via LAN cable or wirelessly to the router. Skype drops down to one bar, then drops out, and tries repeatedly to redial, sometimes achieving a very scratchy voice call for several seconds before dropping out again. If you redial in 2 minutes, it is fine and achieves medium quality video calls. Whilst skype is floundering around, I can sometimes browse the internet, but sometimes it is offline. I have phoned my ISP and they claim no problems on their end. Beyond that I really don't know where to start on looking for the problem.
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Aug 4, 2012
Well while browsing net on my mobile/laptop suddenly the Wifi get disconnected. But the wifi of access point does not drops. Its connected to the router in which wifi drops.Also the net on my desktop connected to the router via ethernet cable, does not go offline. I re,ain connected to net via Desktop even when wifi drops.
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Feb 28, 2011
I had a Linksys Wireless-G router for a long time and had very good luck with it. However, I ended up getting a couple of Wireless-N devices and wanted to get a different router. I bought the Linksys E3000. I got it home and set it up, and at first it worked. Then it would all of a sudden drop everything connected to it. I would restart the router, and in short order it would drop all connections again. This completely baffled me for awhile, until I actually touched the bottom of the router, and it was quite hot. I had it laying flat on a a table, so I could never understand why it was getting so hot. Anyway...I stood it up on it's side and it worked for awhile. Then it would randomly drop various things connected to it. The last straw was when I was listening to internet on the Apple TV, while viewing the internet on my PC and it started dropping the connection every five minutes. Anyway, I have now hooked my Wireless-G Linksys back up and it is working great.
is Wireless-N even needed? I live in a small place, so I don't need it to reach a long distance, and I don't transfer a tremendous amount of date wirelessly, so that doesn't really matter. Should I even try to fix this router? I looked on the Linksys page and I am running the newest firmware.
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May 15, 2013
We have a Cisco 4400 WLC running version 7.0.220.0 and are experiencing clients randomly dropping both broadcast and multicast at the same time. This is not specific to one area of the site and the duration of the MC/Brodacast loss varies. These comms outages don’t happen on all the clients at once but usually affect one client at a time. After a few minutes or a few hours, the client will start receiving the multicast without user intervention.
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The site has Cisco 1522 AP's that have rather interesting logs where the DTLS sends fatal errors, followed by CAPWAP going into discovery state. Not sure if this has the same affect or if that's a completely seperate issue.I was told it could be the GTK but I don't believe 7.0.220 has this feature even enabled. The clients are Cisco 3230 and Cisco 1310's. The clients are running version 12.4(25d)JA1 while the 3230 router is running version 12.4(24)T7. What supporting logs or configs need to be shared to better troubleshoot. This has been going on for quite some time and is frustrating the end user as multicast is essential to the operation.
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Oct 23, 2012
I have a 1841 router connected to an ISP (currently SDSL EFM 10Mbps through an ISP modem, the router and the model are connected with a FastEthernet interface). On another location I have a linux server.There is an ipsec tunnel (3des-sha esp) between the router and the linux server (actually done with a crypto mac).The router has a hierarchical QOS policy on the egress interface.When sending traffic from the network inside the router to the linux host without the ipsec tunnel, everything is working fine and throughput is correct.When sending traffic from the inside network to the linux host internal ip through the ipsec tunnel, some packets are lost and the traffic throughput decrease.When sending traffic through the tunnel in the reverse direction (from the linux host to the internal network), everything is fine.I looked at the QOS statistics and the dropped packets counters don't increase. I looked at the egress/ingress interface statistics and no packets dropped there.I lowered the MTU on the egress interface, but it didn't solve the problem. I played by sending various ping icmp packets size, but even small packets are sometimes lost.I tried to check the router CPU, but it seems relatively fine (<= 10%)I captured the traffic on both side, and I see the packets emitted, and then I can see that some of the esp packets of the corresponding side are not received, so it looks like the cisco router is the culprit. This 1841 router is running: 1841 Software (C1841-ADVIPSERVICESK9-M), Version 12.4(24)T4,How can I troubleshoot where and why those packets are lost?
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Feb 3, 2013
I have a Cisco RV120W router with 1.0.4.10 firmware. The router drop the internet connections, freeze/timeout in admin interface randomly. How can I determine that this is the router's fault, or if it's the switch / internet access is causing it?
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Mar 9, 2011
I am running ping between two Nexus 7018 over WAN link ,and I can see some set pattern of packet drop(7.40 % drop) with MTU size 1500.When I ping between my 6500 VSS pair and same Nexus 7018 over different SP WAN link on diffrent location , I am still getting same kind of packet drop (8% drop) with MTU 1500. Has any one else come across this issue with Nexus?
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Apr 16, 2012
I have a Cisco 871W that periodically will drop its signal. how to configure this for maximum reliability? I set it to use chanel 2462.
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Dec 14, 2011
here's my setup :
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office 1 :
rv042 hw3
ISP:Obtain an IP automatically
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office 2 :
rv042 hw3
ISP:PPPoE
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VPN tunnel between both rv042, everything's fine but when i try to ssh from office 2 to an office 1's server, my connection drops.
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When it drops, i can still ping pc in office 1, this is really strange!if i change the office 2 ISP to another provider (obtain an IP automatically) everything's ok !
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i try to use another PPPoE ISP for office 2 and it's doing the same thing!I've also tried other rv042 in both locations with the same setup and it's doing the same thing, so it's not a router issue.
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i've tried older firmware and it's doing the same thing, so it's not a firmware issue!
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Apr 11, 2013
I am trying to get users in the external identity store (AD) to be dropped directly into enable mode after being authenticated, since I don't know of a way to set an enable password for users in an external identity store. I think it has something to do with shell attributes but I'm not realy sure.
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So here's what I tried.Linking identity group to external group and provide full command priviliges - enable still didn't work Creating duplicate users in the internal identity store and setting the password type field to AD1 - That gives me the ability to get to the enable password prompt hit enter on the blank promt then prompts for Old and new passwords but fails everytime with an Error in Authentication.
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Apr 17, 2013
I´m working with the WLC 8500 and 7 AP 1550; we already setup this equipments since last year, working without a problem, because there was not much traffic (This WLAN is working on a university). a few months ago we began to experiment a few drop connections from one AP, but 2 days ago, all AP are having drop connection all the time, with latency of more than one thousand miliseconds.
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We checked the setup again, and all seens fine, the only thing that we are not sure is about the "load profile" from the 2.4Ghz frecuency, is changing continiously from passed to failed.
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All the AP are working as root (no mesh network), all of them are in local mode, they are working at 2.4Ghz, all AP are using the same VLAN (just one).
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Nov 21, 2010
I have a customer using the RDP plugin via WebVPN on an ASA 5510 (running 8.2.2).They are complaining that after ten minutes or so, the RDP connection drops. Sometimes they can connect again straight away, other times they even have to re-login the ASA WebVPN again.I can't find any logging which explains what is going on.
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Jan 19, 2012
Our ISP will give us a single drop with two public IP blocks - one primary, one secondary. I would like to configure and run 2 firewalls:
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firewallA will have a public ip from primary interface
firewallB will have a public ip from secondary interface
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I'm very new to networking, and trying to find out how I can do it. We have a cisco 2901 router.
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I'm considering
connect the drop to the WAN side of a router (2901)
configure both the primary and secondary interfaces on the router
configure the router in bridge mode
assign the public ips to the firewalls and connect them to the LAN interfaces of the router
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(I know I can use 1 firewall and configure both interfaces on it without the router, but I would like to know if the above setup will work).
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May 2, 2012
Working as a consultant I find it annoying I cannot see a drop-down list in the AnyConnect client as you can with the traditional IPSEC VPN client with multiple profiles. How to modify the default profile to list multiple entries?
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Jan 15, 2013
My internet connection seems to drop offline randomely while surfing the net. It basically results in yahoo or google freezing for 20-60 seconds before unfreezing and running flawlessly again. I seen a previous post that requested the individual hit start, run, cmd, and enter tracert google.com.
Windows 7 Professional
Service Pack 1
Intel® Core 2 Duo CPU E8400 @ 3.00GHz
[Code].....
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Jun 9, 2012
I am looking for a wireless router with the following features for less than $80.
Gigabit Ethernet
802.11n 300Mbps
Open source firmware support (optional)
I found a few of these on newegg but all of them have reviews which claim that these routers drop the wireless signal every so often and need to be reset. I have a router that has the exact same problem but it is very old now and so I understand. But a new router with this problem is not acceptable.
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Apr 20, 2011
I had a D-link DSL-G604T router which recently had begun to drop connections, so I decided it was time for an upgrade. I bought a D-link DIR-615 and followed the instructions on the CD, but no internet connection. After several hours of hair pulling I came accross a solution; If I connected the internet port on the DIR-615 to one of the ethernet ports on the DSL-G604T using an ethernet cable I could then connect to the internet.However this defeats the point of having a new router if I have to use the old one to connect to the internet.Is there a way to configure the DIR-615 so that is works properly?
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Dec 30, 2010
I recently upgraded my network because my DIR-655 started to drop connections. Â My new routers (a Netgear ProSafe VPN Firewall SRXN3205) is working great, but I'd like to re-purpose my D-Link as a wireless bridge. Â
According to Netgear support, I need to link my DIR-655 to another access point connected to the network over wired Ethernet. Â No problem there; I have a DAP-1522 connected via Ethernet on the floor directly below the location of the DIR-655. Â I was under the impression that although the signal was going through the floor, the physical distance to between the two devices would be sufficient to make the connection. Â No joy. Â I use the push-to-connect buttons on the two devices, but they do not connect. Â Is the floor the only issue? Â I do have an ANT-24 antenna extension for the DIR-655 router -- would that make any difference. Â As I say, the physical distance between the two devices is less than 10 feet.
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