Linksys Wireless Router :: E3000 Dropping Packets On Any Channel But 1

Jul 24, 2012

My E3000 has about 60% packet loss if the channel selected is anything other than 1.  I can't enable 5GHz or even 40mhz 2.4GHz channels without dropping 60% packets.

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Linksys Wireless Router :: E3000 5Ghz Auto(DFS) Versus Selecting Channel

Nov 15, 2012

I have an E3000 Dual Band. On my 5Ghz channel, I can select Auto(DFS) or I can manually select a channel.First of all, what does the DFS stand for? My 2.4 GhZ channel only has Auto, not Auto(DFS).
 
Second, when I select Auto(DFS), my wireless speed defaults to 144Mbps, and is only a single channel (I can see it in the in SSIDer utility). When I manually select a channel, no matter what channel it is, I get 300mbps and I can see that the signal is two channels (for instance, 36+40). Why Auto(DFS) doesn't automatically select the best channel and fastest speed?

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Linksys Wireless Router :: WRT120n Dropping Incoming Fragmented IP Packets?

Oct 13, 2011

I am trying to use my WRT120n as access device  for an IP Centrex service using SIP protocol. My SIP phone is located right behind the router.My problem is sometimes the router is dropping incoming calls because signalling packets are fragmented at IP level. So I cannot receive those calls.Is there a way to enable the router to accept these packets?

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Linksys Wireless Router :: E3000 Keeps On Dropping Signals?

Apr 22, 2012

It seems since I have moved into my new house months ago my E3000 keeps on dropping its signal.  I have an older roouter that doesn't do this. Currently I have a PS3/Xbox 360 plugged in and then the 3 laptops that use the wireless.

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Linksys Wireless Router :: E3000 Dropping Wifi Connections?

Aug 4, 2011

Set channel manually - i've tried all the channels no luck

Different SSIDs for 5g and 2.4g
Beacon Interval 50
Fragmentation threshold 2306
RTS Threshold 2304
 
I'm running firmware 1.0.04 build 6   <script type="text/javascript"></script> Dec 6, 2010?I've had the router for 4 months now and this has been happening for the last 3.

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Linksys E3000 Router / Ethernet Connection Is Dropping While Wifi Stays Connected

May 27, 2011

I have Comcast cable internet routed through a linksys E3000 router. My desktop is connected to my router via ethernet and my various other devices including my laptop are wifi connected. It seems almost at random that my desktop will lose its connection.Windows will show me as still being connected and my network connection will show a normal status until I atttempt to repair it then it will change to limited or no connectivity. Through all of this, my other devices all still have a wifi signal (I don't use more than 1 or 2 at the same time). I can reconnect to the internet by unplugging my ethernet cable then reuplugging it back in and my connection will start working again. I've also had several blue screens, and when I checked the dmp files it revealed my network card driver as the culprit, yet I have reinstalled and even clean installed the microsoft signed driver. I have also attempted to reboot both my modem and router to no avail.

Microsoft XP
Marvell Yukon ethernet adapter on a biostar mobo
C:Documents and SettingsMain>ipconfig/all
Windows IP Configuration
Host Name . . . . . . . . . . . . : sn1
Primary Dns Suffix . . . . . . . :

[code]...

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Cisco WAN :: 800 Router Dropping SMTP Packets

May 29, 2012

We have a cisco 800 series router between the internal network and the WAN. the problem is we are unable to receive some of our mail due to dropped packets by our router. the conversation between the two servers stops at the point were our server responds with the command 250 2.1.5 user@mydomain.com | 354 Start mail input; end with . i was able to trace the packet, using Packet Export, on the internal interface but not on the external interface. Also i have noticed that the external interface has about 160,000 unknown protocol drops while the internal interface has 0.

Is there anyway to find out way the external interface is dropping the packets.

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Cisco WAN :: 1811- MTU 1500 - Router Dropping Certain Packets

Dec 15, 2011

I seem to be having an issue where certain very packets are being dropped/lost by my office router. The reproducible situation is, when I attempt a DNS zone transfer from my linux bind DNS server (A.A.A.A) to any server on my network behind NAT (Y.Y.Y.Y) the first packet (Seq 1) of the response is lost. The client making the query asks for first packet (Seq 1) to be resent, and the DNS server attempts to resend it repeatedly, but those are lost too.

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Cisco WAN :: 3945e Udp Packets Are Dropping

Dec 13, 2012

I have a NAT setup. Some of my udp packets are dropping. How to find more about the NAT to find whether it missed anything or not. the router is 3945e. [code]

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D-Link DIR-655 :: Dropping Packets While Gaming On Computer

Mar 27, 2012

I bought a DIR-655 a less than a year ago on amazon, and it was working great up until about 4 weeks ago. Ive noticed that it has been dropping alot of packets while I am gaming on my computer. I would run about 95-98 ping usually and now it jitters every 5-10 mins or so from 95-98 to up to 500. It is really troublesome during games and I dont know what to do. Ive tried disabling QoS and still nothing. I run on wireless G and N with auto 20/40 mhz. Standard WPA(personal) and it was running absolutely great until now. I know its the wireless because I have hardwired it into my laptop, both from the router and just the modem itself with no problems whatsoever. I dont know what to do about it.

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Cisco VPN :: VPN To Juniper ISG 1000 Dropping Packets

Aug 1, 2012

I have ASA 5510 with 8.4 connected to ISG 1000, when traffic is passing the VPN tunnel is working fine, when the traffic stops, ASA will drop the packet but the VPN tunnel on ISG still up .When new traffic started from ISG side, it will drop, as the tunnel is not up on ASA side.

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Cisco Firewall :: ASA5505 Dropping Packets

Apr 30, 2013

I am  having an issue where the ASA is dropping packets on the vlan  interfaces. I have it as a dedicated router/firewall for a 100mb connection .
 
Vlan1 is the internal networkVlan2 is the network to cable modem
 
Eth 0/1 is connected to a 2960G switch with hard coded 100mb Full  Duplex at each end, this is the inside interface. Eth 0/0 is the  connection to the cable modem, this is the outside interface, set at  auto at both ends.
 
Im getting on the vlans eg. 51253 packets dropped however network  traffic isnt impacted and everything runs fine, as well as 46532 switch  ingress policy drops.
 
Example;
 
ciscoasa# sh int vlan1Interface Vlan1 "inside", is up, line protocol is up Hardware is EtherSVI, BW 100 Mbps, DLY 100 usec MAC address 70ca.9b36.ab80, MTU 1500 IP address 10.x.x.x, subnet mask 255.255.255.0 Traffic Statistics for "inside": 43250588

[Code]......

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Cisco Switches :: SG300 Is Dropping Packets?

Apr 10, 2012

We have a customer who we sent to Cisco to replace some aging Dell switches. They purchased 5 SG300-52’s for 2 different networks. Their production LAN has 2 “live” switches and 1 spare. The 2nd, a development LAN has 1 switch and 1 spare. Their primary production SG300-52 has GE1-8 VLAN’d off as VLAN2 for public IPs. The untrusted (WAN) interfaces of 2 x ASA-5510’s, 1 x ASA-5505, and 2 x RV082 v2’s are connected to GE2-6. GE1 is the uplink to the co-location center’s Cisco switches. GE7 & 8 are spare ports. Each SG and device port is hard coded for 100/Full.
 
One of the ASA-5510’s and the ASA-5505 maintain a site-to-site VPN (the development LAN used to be in a different facility hence the VPN). Recently the developers have stated the performance is horrible. I noticed ping traffic loss from PCs on the dev side to servers on the production side in the order of 20-30%. I assumed it was a VPN issue so I opened a ticket with Enterprise TAC (all the ASAs and the SGs have either SmartNet or extended support contracts). TAC determined the problem happened even if you ping from inside the ASA to the untrusted side of the other ASA thus eliminating the VPN as the culprit.
 
The 2nd ASA-5510 has the AIP module and was not even live until this weekend. Turning it up and giving it a basic config returned the same results. #ping x.x.x.x repeat 100 will drop 20-40 packets. I have no security enabled on the SGs and even tried using the spare SG300-52 this weekend in place of their primary with the same result. I’m to the point of returning one of the Dell switches to production, but this cannot be a good sign. I’m also a bit frustrated that I’ve yet to figure out how to get Cisco Enterprise to speak with Cisco Small Business on this. The customer has over $10k invested in Cisco equipment and Cisco isn’t jumping in to figure this out.
 
The latest rep wants a packet capture from the SG300’s VLAN2 but there are no PCs there to do this with and the manual doesn’t even talk about doing this. How we can do this as well as get the 2 divisions working together to fix this? BTW, the RV082’s exhibit the SAME exact problem. I can ping from ANY device on VLAN2 to any other device and drop packets. Copying a simple 1MB file over the VPN can take minutes where it should take 1 second. I can reproduce this for 24/7.

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Cisco Firewall :: ASA 8.2.4(4) Seems To Be Dropping Valid TCP SYN Packets?

Feb 28, 2012

We have a setup with a MS-TMG - ASA (8.2.4(4) in routing mode) - (internal) Router - FWSM - Router - Exchange with NLB.  We have now the problem that IMAPS is not really working through this setup. It works from internal (without ASA and TMG inbetween), but not reliably through the internet. There is a rule on the ASA which permits the ports from the TMG to the Exchange NLB address.We opened a case with Microsoft and they told us that not all tcp-syn packets are received by the Exchange server which were sent by the TMG.Thus I sniffed on the ASA with a packet capture and indeed, a lot of syn packets were on the interface to the TMG, but not anymore on the interface to the internal router.This ASA also filters all other internet<->company traffic, so there's a lot of stuff running.
 
Maybe it's dropped in the ASP, or is the capture maybe not valid?Here the show asp drop:

ASA01-Internet# sh asp drop
Frame drop:  Invalid TCP Length (invalid-tcp-hdr-length)                                  1  Reverse-path verify failed (rpf-violated)                                  319  Flow is denied by configured rule (acl-drop)                            477077  First TCP packet not SYN (tcp-not-syn)                                   10212  TCP data send after FIN (tcp-data-past-fin)                                 41  TCP failed 3 way handshake (tcp-3whs-failed)                               824  TCP RST/FIN out of order (tcp-rstfin-ooo)                                 1419  TCP SEQ in SYN/SYNACK invalid (tcp-seq-syn-diff)                             6  TCP SYNACK on established conn (tcp-synack-ooo)                              1  TCP packet SEQ past window (tcp-seq-past-win)                              821  TCP invalid ACK

[code]....

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Cisco Routers :: RV082 Dropping Packets?

Feb 14, 2013

It appears we might have an issue with our RV082 (v4.2.1.02) dropping packets during the teardown of many TCP conversations.  I have attached two packet captures of what I believe is the same conversation.  One is from outside the router (Wireshark using an Ethernet Tap) and the other is from the client inside the router (SLES11SP2 running TCPDump).  These are both very small captures 9 packets and 18 packets and I'm hoping it will identify the problem.
 
It appears that the RV082 is prematurely closing the natted port used to communicate with the host outside the network.  The host sends a FIN, ACK packet, to which the client responds with an ACK,  However, when the client then sends his FIN,ACK sequence, it never makes it outside the router.  The client sends a total of 9 FIN,ACKs trying to contact the outside server, but none of those appear to make it through the router.
 
Is the router slamming the door prematurely?  (I've been fighting with this problem for 3 weeks now!)
 
Inside Capture:
----------------------
No.     Time                       Source                Destination           Protocol Length Info
1 2013-02-13 19:32:37.827942 192.168.1.45          38.113.116.214        TCP      76     35975 > http [SYN] Seq=0 Win=14600 Len=0 MSS=1460 SACK_PERM=1 TSval=635644783 TSecr=0 WS=128

[Code].....

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D-Link DIR-655 :: How To Stop From Dropping Back To Using A Single Channel

Jul 14, 2012

I live in a Townhome complex so inSSIDer displays a lot of wireless activity.  I have noticed that many of the routers channels are listed as 6 + 2, 4 + 1, etc., while show only a single channel.  I have been able to "temporarily" replicate this by setting the Channel Width on my DIR-655, by setting channel width to auto, and when I am successful it displays a speed of 300, both in my task bar and in inSSIDer.  However, that is usually short lived and the channel for my router reverts back to a single channel and the displayed speed drops to 130 or 144.  My neighbor's Netgear is rock solid at displaying dual channels.  Well, that and besting my signal strength. :-)

I have the router manually to channel 8 because none of the routers, judged by their displayed strength, use it.So, I guess my question is; how do I stop my DIR-655 from dropping back to using a single channel, which I interpret 20MHz, even though it is set on auto?

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Cisco VPN :: Srp527 VPN Tunnel Dropping Packets Intermittently

Dec 12, 2012

We have a Cisco ASA and recently purchased a cisco small business srp527 router.  It is connected to our ADSL2 connection and is working fine.  I have configured the device with an ipsec tunnel using an ike profile and the tunnel is created successfully with packets traversing the tunnel.  However packets are being dropped intermittently, with no cause.  The link is currently not being utilised, there is no load on the network however when I ping Google and any address subject to the rules of the tunnel i notice that a single packet is dropped every now and then.

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Cisco Switching/Routing :: Why C2960 Is Dropping Packets

Dec 26, 2012

We have a customer who uses about 20 x c2960's switches for access layer and 2 x c3560e for distribution layer. C2960's uses C2960-LANLITEK9-M , Version 12.2(58)SE1. Everything was working fine. Now we got information, that sometimes there are problems with connectivity. Customer tries to reach internet.
 
SW11#sh int fa0/18       
FastEthernet0/18 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is e8ba.806a.4412 (bia e8ba.806a.4412)

[Code].....

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Cisco WAN :: Dropping Scavenger Packets On ASR 9000 During Congestion

Aug 6, 2012

I am trying to find a solution using modular QOS when there is congestion in circuit we drop packets with WRED which are marked with a DSCP value of say AF21. I can drop those traffic completely in case of congestion.  I was thinking to allocate 100% bandiwth to rest of the traffic.

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Cisco Firewall :: 871 - Default Class Map Is Dropping All Packets

Aug 21, 2012

I have a Cisco 871 router that used to have Access list based security. now I am trying the ZBFW for the first time.  I thought I had a pretty good program until I found all my traffic was getting dropped. This is my first stab at ZBFWs and I am a bit confused esp with the default class part.
 
The router is for my house and thus also has to have priority for gaming. I will add the gaming and voice QOS once I get it working,
 
Guest VLAN has access to 2 IP's in Data for printing. Cisco871#sh run

Building configuration...
  
Current configuration : 8005 bytes
!
version 12.4
no service pad

[Code].....

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Cisco Firewall :: ASA5540 Dropping Packets On Large FTP Transfer

May 23, 2011

I am attempting to FTP to a remote site through a IPSEC tunnel.When I am transfering large files the ASA5540 is showing syslog errors stating "connection timeout".  What I think is happening is after about 1 hour the firewall is closing the connection control port for the FTP session and neither end is notified so eventually the transfer is stopped.What do I need to modify in the FW to accommodate these larger files?

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Cisco Application :: ACE Module A2(3.5) Is Dropping Packets And Closing Connection

Jul 26, 2012

I have a ACE module A2(3.5) installed, I am having a connectivity problem between two servers in my network. I have captured some traffic on different points in my network and from capture it seems like the problem is with this ACE module or somehow it is closing the connection.

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Linksys Wireless Router :: EA4500 Only Uses 2.4 Ghz Channel?

Dec 19, 2012

I downloaded and installed inSSider for Windows and, under the 2.4 Ghz tab, I can clearly see the Router SSID, on Channel 6, exactly as configuredbin the Router. However on the 5 Ghz tab, nothing? I can see Channels 36, 40, 44, 48, 52 and so on BUT no trace of any wireless signal here?I carefully reviewed the wireless settings options and it is indeed enabled.

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Linksys Wireless Router :: What Channel E4200 Is Currently Using

Jul 31, 2011

I am trying to figure out what channel my Linksys E4200 is CURRENTLY using (at the time I check it)I am having issues with occassionally losing my connection (mostly from the computer furthest from the router) and it may be caused by a cordless phone , in the room with that computer as I think the problem only occurs when on the phone in that room.So I am trying to determine what channel that it may be using at the time of the drops ...(so I can set it NOT to use that channel)I'm pretty sure it it something on the 5ghz (40mhz)side .but I don't really want to set the router to use 20mhz only as the speed greatly drops when on 20mhz only (i.e. 50mbps vs up to 200mbs when 5ghz is activated)
 
Checking my Router set up page, I see only what channels is CAN use, not what is currently being used.Is there anyway to identify what channel it is currently using so I can see if it is a specific channel causing the issue and not have to switch off 40mhz?

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Cisco Switching/Routing :: Auto Qos Dropping Port Channel In 3750?

May 13, 2012

We have a switch that, when configuring auto qos on and edge port facing video equipment, the upstream port channel drops. I was wondering if no auto qos would have to be configured on the member ports of the port channel prior to enabling auto qos on any other ports. 

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Cisco Firewall :: 5510 Inspect SIP Dropping Request Message Packets

Mar 17, 2011

I have 2 ASA 5510 firewalls at 2 different sites. Both running on version 8.0.4. Users are using an Instant Messaging type of application provided by a local telco here which is able to send and receive SMS using SIP (from the packet capture that I've done).
 
When users use the IM in site A, they are able to send and receive text messages via the IM from behind the firewall. However, when the users are in site B, users are able to send out text messages but not able to receive them.
 
I noticed that when I remove "inspect sip" from site-B's global policy map, users from site-B can successfully receive text messages. I have confirmed that it is the firewall that drops the packets as I have captured the inside and outside interfaces of site-B's ASA and I can see the incoming sip "request: MESSAGE" packet on the outside interface but I do not see the packet exiting the inside interface.
 
I have cross check both firewall configurations, and I do not see anything suspicious commands relating to sip that might cause this issue. Is there any command to troubleshoot why the sip inspection is dropping the sip packets on site-B?

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Linksys Wireless Router :: Changing WRT54G Channel?

Apr 23, 2011

How do I change the channel on my Linksys WRT54G2 ROUTER?

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Linksys Wireless Router :: Macbook Pro And 5.8 Ghz Channel On WRT610N?

Feb 17, 2010

Any success with a recent vintage Macbook Pro connecting to the 5.8Ghz channel on a WRT610N.  I can connect with the 2.4 channel without a problem but I cannot maintain a connection on the high channel.  Linksys support told me that the hardware was not compatible with the high channel.

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Linksys Wireless Router :: Corrupt SSL Packets Via WRT310Nv2?

Dec 10, 2011

I occassionally see an issue on my network wherein a few of my devices (my phone, my wife's iPod, and my Ethernet-connected HTPC) will continually return a bad username/password combo when accessing services like Gmail (IMAP/Exchange), Pandora (HTTPS), or Boxee (HTTPS). The seem to have problems at the same time, which makes me think they are doing this as a result of something failing on my router (and yes, I'm certain the saved passwords are all correct since I won't change them and they'll start working again later). 
 
Whenever the problem occurs, I'm making sure the date/time are right on my devices (i.e. certificate validity dates) and that they all sill have normal internet access. If I had to speculate, I'd guess this problem his happening when my router is under significant load and it's dropping some SSL packets.
 
I'm running the Linksys WRT310N v2 with firmware 2.0.0. I see there's an updated firmware available (2.0.1), but haven't yet applied it - and the release notes don't speak to my problem at all. I've rebooted the router after the last occurrence

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Cisco Switching/Routing :: 3750v2 DHCP Snooping Not Working Dropping Packets

Jan 9, 2013

I recently installed DHCP snooping on a 3750v2 switch (Version 12.2(55)SE4) and configured the uplink(Po2) as a trusted port. The problem is that clients cannot receive an IP address. When I disable DHCP snooping it is working properly. DHCP snooping is configured correctly but I don't have an idea how to resolve it. [code]I tested the solution on the same kind of hardware switch and firmware and it worked out fine. What is causing the clients not to receive an IP address from the DHCP server?

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Cisco Switching/Routing :: 3750X Switches Dropping Packets On Uplink Interface?

May 9, 2013

We have a remote site that is using 3750X switches as layer 2 switches back to our home site.  The uplink port is showing dropped packets but the utilization on the link is never about 10%.  We have a 100Mb circuit to this site.  Our speed tests and iperf tests are not showing any issues that we can see.  However the port is still droping packets.  It is not dropping at a high rate but they are dropping.          
  
switch#sh platform port-asic stats drop gi1/1/4
  Interface Gi1/1/4 TxQueue Drop Statistics    Queue 0      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 1      Weight 0 Frames 52876      Weight 1 Frames 2      Weight 2 Frames 0    Queue 2      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 3      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 1330874    Queue 4      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 5      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 6      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 7      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0switch#
         
Is there a way to capture these dropped packets to see what they are?  We do have VOIP phones at the site and are using Qos.

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Cisco WAN :: 3750 And 4507 / 1Gbps Link / Sweep Ping Dropping Packets?

Dec 29, 2010

We are testing a new 1Gbps WAN circuit between 2 sites. We have cisco 3750 and 4507 on each end. Every time we run extended ping sweep ranging from 36 to 18024 bytes the packets are being dropped randomly once the size goes above 1500 bytes. Our ISP claims Demark to Demark test are clean and they don't want to acknowledge the problem, they blame our switches. To prove the problem is not on our end we've put different switches at each end, still facing the same issue. Ping success rate is around 98 to 99 percent.

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Linksys Wireless Router :: EA6500 5GHz Channel Is Not Complete

Dec 25, 2012

EA6500 5GHz band only four channels (36,40,44,48), the lack of 149,153,157,161 channel, firmware Ver.1.1.28.146072, how to add 149,153,157,161 channels?

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