All Servers Under VLAN Disconnects Every Sixth Hour?
Aug 2, 2012
we noticed that every six hours, our all servers in a VLAN disconnects/disappears from the network for a time of 10-20 secs and it comes online immediately. It impacts the performance of the application for a moment.
We use CISCO router com Switch and Checkpoint firewall to access those servers. The issue is not every six hour, it is every sixth hour from its previous instance. Eg) if it 9 am in the morning then it happens somewhere around 3:01 pm in the afternoon and again 9:02 pm in the night.
There is no DHCP allocation or server in our environment. All ip address used are static.
specially, what could be set to action every six hour ?
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Mar 1, 2013
Have a problem with Wi-Fi, and going to work on this computer over the weekend. So before I get my hands on it, hoping to get some suggestions on how to get it done. The time for a fix will be limited. Wi-Fi always disconnects after about 1 hour of connection to a Wi-Fi hotspot under Windows 7 via Bootcamp.These Wi-Fi drops happen in every hotspot (fast food, hotel, other free Wi-Fi) so far.Works without drops when connected to same Wi-Fi hotspots in Mac OSX 10.x.Even works in Windows 7 when using own, separate Verizon 4G mobile hotspot, model MIFI 4510L. But again not when connected to the hotel hotspots/routers.Loses Wi-Fi connection after about an hour when on regular Wi-Fi (via router/hotspot). Happens on different Wi-Fi networks in different places -- same problem.Checked online and saw lots of people having Wi-Fi disconnection problems in Windows 7 on Mac Books (Pro and Air). Also saw people having lots of disconnection problems with just Windows 7 (without a Mac).
What makes Verizon 4G hotspot so different from other hotspots? Is it protocols? Different encryption? Something else?Obviously I can't change the settings on the routers (as they are the establishment's and are different in every place). I can only change something locally on the laptop itself.I have very limited amount of time to apply any fixes I can think of. About 1 hour; 1 and a half max. I know that it's not best for trying to troubleshoot it, but that's all I have this week to work on it. In a few weeks I might have more time to spend with it. Laptop may have Hide My Ass Pro VPN proxy installed. Can't verify at the moment. OSX has it for sure. Windows side -- not positive. But switching it off will be the first thing I'll try. What steps to try to undertake and in which order. Any way to monitor the connection live and see what caused the disconnect? Say a live or recorded log of network card and router communication? Reinstall drivers? Any better drivers available for it? The Wireless card is called Airport officially. But if remember correctly it is: Broadcom BCM43xx.
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Nov 20, 2010
I just bought WRT54GH router. I have one PC (running Ubuntu) connected via Wireless.Every 5-10 minutes I get disconnected for a short period of time (about 10-30 seconds). During that period I am able to access router configuration page, but can't connect to the "outer" world... Surely it's not about my Internet provider, since connecting the PC directly to the Internet cable works fine with no "disconnections".
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May 25, 2011
We have 4 computers that all run new versions of Windows 7. Each have been connected to a Mapped Network Drive and they all connect fine to the network. Dragging files throughout windows works fine. When we try to attach a file from the network in the browser (as in a GMail message) or upload a file with FTP it disconnects us from the network and from the Internet.This only happens with 2 of the 4 computer.
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Mar 26, 2012
Company has implemented a 3750x with older Lexmark Pro print servers on new V lan configuration for printers. Causing print servers to lose connection. Have to reset constantly. Have tried to configure print server ports to full. Also new Nexus 7000. Perfect scenario is network devices.. not there yet.
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Mar 24, 2012
I have a network with the following structure
internet ---- cisco2911 ----cisco3750 --- internal lan
I have two email servers on different vlan
192.168.0.1 ----- 1.1.1.2 (public ip)
10.1.1.65 ---- 1.1.1.3 (public ip)
Before these servers were directly connected to the internet with two nics (Nightmare, I know). The Public IP on internet facing NIC and private ip on LAN facing nic. I'm in the process of changing this.I'm able to access internet from my vlans and also able to send emails but cannot receive emails on these servers.
My router congif is as follows:
Building configuration...
Current configuration : 6234 bytes
!
version 15.1
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
[code]....
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Jan 24, 2013
I’m working with a managed switch that has three V LANs setup on it. Recently the domain changed and the wireless V LAN can no longer access the internal website. I found access rules, in the switch that allowed the wireless V LAN to use the DNS server on the private/staff V LAN. Their DHCP scope is on the switch and DNS is set there. The Website is also on the V LAN with the DNS server. This configuration totally cuts out external DNS usage. It stopped working though. It is as if when things switched on the Domain the wireless users were denied DNS requests. The switch was not touched at that time. I’m looking at it though and it seems that I may have conflicting rules.
The version is 12.2. I believe its a Catalyst 2600~
DHCP scopes: ip dhcp pool INSIDE network 192.168.1.0 255.255.255.0 default-router 192.168.1.1 dns-server 192.168.1.6 192.168.1.4 domain-name saline.lib.mi.us
ip dhcp pool WIRELESS
network 172.16.0.0 255.255.255.0 default-router 172.16.0.1 dns-server 192.168.1.6 192.168.1.4
Here is the V LAN Setup:
Interface Vlan1
ip address 192.168.1.1 255.255.255.0
[code]...
Here are two access lists that should be allowing the traffic from 172.16.0.0 into the list IPs/Ports. These do no work.
ip access-list extended WIRELESS-PRINT
permit tcp 172.16.0.0 0.0.0.255 host 192.168.1.12 eq 30044
permit tcp 172.16.0.0 0.0.0.255 host 192.168.1.12 eq 21326
permit tcp 172.16.0.0 0.0.0.255 host 192.168.1.12 eq 6987
[code]...
During my testing I removed the Deny rule and everything worked. deny ip 172.16.0.0 0.0.0.255 192.168.1.0 0.0.0.255
However, the “ permit ip any any “ rule, makes all the port rules pointless because when this rule is in place solo, I can ping and access everything on the 192.168.1.0 network. Is there a way to deny everything, except what I permit? Because when I remove the ip any any, then they cant even get out. Perhaps there a better way to say, the wireless users can get out but only get into the sub net over specific ports? I have a feeling it may have not be thought out entirely when initially created. However, the big mystery is that it worked before secondary domain controller failed.
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May 24, 2011
My internet connction gets disconnected with in 1 hour . local area connection shows packets reciev and sent are in millions in 10 minuts . do i have a virus ?? or becouse of bytes sent and resived so much my internet gets disconnected. after disabling and reanabling my local area connection i can again use my net for some time.
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Apr 12, 2011
I have a modem and connected to the modem is my wifi box. I have 9 computers using the wifiWhat happens is the internet connection just drops for ALL the computers at the same time even though ALL the computers signal strength is excellentI have to reset the wifi box and then all the computers are back onlineThis can happen 2 or 3 times an hour or sometimes I can go 2 hours or so
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Mar 1, 2011
i already tried resetting my ip but im still loosing connection every 1 hour :(
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Sep 16, 2011
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Sep 7, 2011
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Jun 19, 2011
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Nov 5, 2011
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Feb 1, 2011
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Mar 9, 2011
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Jun 8, 2012
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Nov 13, 2012
Region : India
Model : TL-MR3020
Hardware Version : V1
Firmware Version : 3.14.2 Build 120817 Rel.55520n
ISP : BSNL India
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Feb 21, 2013
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Jun 28, 2012
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Aug 20, 2012
I have a client that I recently replaced their GSS's for and last evening I cut them over to an HA pair of ACE 4700's. After about an hour, it looks like the GSS and ACE stopped communicating with each other. When this happened, they switched back over to the old CSS appliances and everything came back up fine. Apparently this happened the last time they tried to cutover to the ACE and they contacted TAC. TAC told them the issue happened because the GSS's they were running at the time were EOL. So now, with brand new GSS's, they are experiencing the same issue.
As of now, the ACE's are offline and I cannot get into them to see what the issue may be. We tested the sites out last night after the cutover and everything seemed fine. There was one minor problem that I resolved quickly, but that was it and then we left. The client started getting emails about an hour later about their main website being down. They do have the ACE logging to a syslog server, so we will look at that to see if there is anything relavent. I suggested that we bring up a test site to use through the GSS/ACE and see what happens. They have another CSS that they can run their sites through, so this option will work without taking down all of their other sites.
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Aug 24, 2011
Lately (after upgrading to 1.0.2.1 and 1.0.2.4) I have been seeing these particular errors in my syslog server:
10.0.0.1 01/02/11 17:54:47 08/24/11 12:54:58 kernel Warning rv220w "KERNEL [Kernel] ERROR:endChantRecv: protocol PNAC returned !OK"
10.0.0.1 01/02/11 17:54:47 08/24/11 12:54:58 kernel Warning rv220w "KERNEL [Kernel]
[Code].....
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Jun 20, 2011
I know the problem lies in the timeout for the default inspection rules. I cannot find where to change this.I have nat statements for 1 to 1 nat to my polycom and tandberg video devices. I have set the firewall for the ouside to in rules to inspect all. This allows the devices to communicate with public addresses, but the video calls drop after 1 hour. How do I change the settings so this does not happen. I have tried setting the rule to allow instead of inspect, but when I do this, I have no access at all. I just want to nat 1 to 1 and allow all traffic to the nated devices. I know this is not secure but it is the only way to allow h323 through to let the video conferencing devices work.
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Feb 5, 2013
i just setup an RV220W as my home router. Everything connected fine, etc. however, one of my wireless devices (it's a security camera) disconnects after 1 hour. I am able to reconnect the device if I either reboot it, reboot the RV220, or disable / re-enable the Port Forwarding rule I've established for it. Other wireless and wired devices do not have any issues. In the past, I had this same camera working for over two years over wireless while it was connected to a Linksys E2000 router. I enabled the logs on the RV220W last night, and the error message that I receive is: secureBit not set in GTK Msg2. I've got the same SSID on the RV220 that I had on the E2000, same port forwarding, same MAC address client list, etc. Like I said, none of my other wireless or wired devices disconnect at all, just this camera, which worked flawlessly until I switched routers.
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Jun 27, 2011
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Dec 25, 2012
I just upgraded from RV-042 to RV-042G on 24.Dec.
My previous connections are : (1st) 100Mbps ISP connection, (2nd) 200Mbps ISP connection (fibre to home)
Before upgrade, my RV-042 worked very stable.
After using Migration Tools by exporting RV-042 current config and converted to V3 configuration, the converted configuration was imported to RV-042G.
In beginning, RV-042G woks fine after imported converted configuration file. Unfortunately, after around 1 hour of use, my iPad (through an Apple Airport Extreme Station) and wired PC could not browse internet.
But, port-forward to 3 IP-cam still be able to access by my iPhon4 through Carrier 3G connections.
After a reboot of RV-042G, internet connection comes back. But, after an hour of use, the same issue happened again.
RV-042G makes me fluctuated. I will fallback to RV-042 from now on and wait for any further firmware improvement from Cisco/Linksys.
My previous RV-042 and current RV-042G config:-
* WAN1 : 100Mbps ISP connection
* WAN2 : 1Gbips ISP connection ( 200Mbps max throughput)
* LAN1 : connected to Apple Airport Extreme
* LAN2 : connected to Linksys 16-port FastEthernet switch
* LAN3 : idle
* LAN4 : connected to an Intel i7 PC
* Dual WAN link mode with bandwidth management, all internet connection from PC will stick on WAN2
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Nov 26, 2012
how can i solve this error:
Tue Nov 27 10:55:40 2012(CET) [rv120w][Kernel][KERNEL] ERROR:endChantRecv: protocol PNAC returned !OK
Tue Nov 27 10:55:40 2012(CET) [rv120w][Kernel][KERNEL] ERROR:endChantRecv: protocol PNAC returned !OK
Tue Nov 27 10:55:40 2012(CET) [rv120w][Kernel][KERNEL] ERROR:endChantRecv: protocol PNAC returned !OK
Tue Nov 27 10:55:40 2012(CET) [rv120w][Kernel][KERNEL] ERROR:endChantRecv: protocol PNAC returned !OK
Tue Nov 27 10:55:45 2012(CET) [rv120w][Kernel][KERNEL] ERROR:endChantRecv: protocol PNAC returned !OK
[code]....
i have a wireless device and every 1 hours the connection drops and i must reboot the device
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Jun 11, 2013
We are planning to split the Private servers from the DMZ Servers and configure an additional Interface and segment for this purpose.
Private Servers Segment: 192.168.4.0/24 (there is no DHCP all servers' IPs are statically configured)
DMZ Segment: 192.168.3.0/24 (This is a future deployment)
LAN Segment: 172.17.0.0/16
Both, Private Servers and DMZ Servers are in a collocation as well as the ASA5520. There are multiple Branch offices that uses subnets within the 172.17.0.0/16 Network and they are connected to the ASA5520 via Metro-E.
I do not know if this is possible but what I want to do is this:
In order to avoid the change of internal DNS records I want to mask the DMZ servers with a Private Server IP when a Private server or LAN host wants to access it like this:
The FTP server in the DMZ has the IP address: 192.168.3.100. But when a PC from the LAN wants to reach the FTP server it should points to its old IP: 192.168.4.100. This way the PC sends a packet to the ftp.corporate.net (192.168.4.100) the ASA recieves the packet and translate it to the (192.168.3.100) and send it out through the DMZ Interface.
Also if the Private Servers wants to reach the same FTP the ASA will act like a proxy-ARP and send the paquet to the DMZ by means of the translation of the IP.
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Dec 31, 2012
Not sure if I have a defective router, but if I unplug it I then need to wait at least a half hour to plug it back in. Anytime sooner and it won't broadcast a SSID or connect to the modem. This is a huge inconvenience if you want to change router settings and then you need to restart.
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Jan 1, 2012
I have Cisco 2811 secure router in my network. Seven day before it has been hanging every 3-4 hour. i have updated "c2800nm-advsecurityk9-mz.124-17.bin" IOS in the router. After that it giving some error and every 7-10 hour network has been delay in LAN as well as WAN and not pinging.
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Apr 16, 2011
i'm trying to connect 5 servers together to create a private network.Each server has a network of it's own and i'm trying to make all 5 servers communicate with each other to share and search data simultaneously..
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Mar 20, 2012
I Have exented vlan 120,121 from DC-1 to DC-2,the DC-1 and DC-2 are connected using L2 Trunk over fiber terminated on Cisco 6513 on both site ,the distance around 40 Km ,on the DC-2 i just assigned server-1 TO VLAN 120 while server-2 in vlan 121 ,but these servers unable to communicate neither with DC-1 Servers or betwen them locally on DC-2 ,pls note that the servers at dc-2 rely on DC-1 for routing.
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