Time Outs On LAN - VoIP Phones Have A Delay Internally?
Oct 6, 2011
A couple of users on my network complain about timeouts. They access the same server which runs a SQL server. People from outside world can access it without a problem but internally it keeps timing out. I have also noticed that VoIP phones have a delay internally. So if i pickup my phone and dial an extension the other person can't hear me sometimes but i can hear him.
I have experienced the VoIP problem but have never had any time outs on my machine. I tried packet capture on a couple of computers but i cant see anything out of the ordinary. Alot of ARP, some STP which i think shouldn't reach the machines, dropbox traffic etc.
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Jan 24, 2011
I am encountering delays when making any calls using VOIP. I understand that there is always a delay using VOIP but not as much. I've done a bandwidth test on my network and everything seems to be Ok, we have 4 T1s with 55 Reps using it. There is nothing choking up the network.
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Jun 10, 2012
I have some 79xx series VOIP phones that are acting VERY strange ... if you are familiar with these series phones once plug them into the PoE switch they look for a TFTP server with the call manager files to acquire all the info they need to work .... i have them set up on a 2620xm router running IOS c2600-ipvoicek9-mz.124-15.T14 along with call manger 4.3. My router is my TFTP server and i have hooked up and fixed over 50 of the same series phones with out a problem.
Now here is my issue ... when you goto press the SETTINGS button on the phone you are allowed to go into the settings of the phone to change all the ROUTER,TFTP,ETC info to allow you to connect your phone to the CALL MANAGER or you can set up DHCP and it will acquire the info automatically. When i press the SETTINGS button nothing happens .... i can reset the phone to factory defaults by holding the # button then 12345678*0# then 2 not saving the info and i can hit the restart buttons which is * 6 SETTINGS buttons together and that will let me restart the phone but i cannot manually set up this phone to do anything .. it will not acquire info form my DHCP server and will not find my TFTP server at all =( the phone SETTINGS BUTTON does not respond at all ..only when restarting the phone.
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Mar 12, 2012
has anyone here played around with uploading compatible audio files for custom rings and MOH and/or personalized backgrounds for the phones? I was only taught the basics in our CUCM v6.0.1 and am looking to figure out how to get some good music on my phone as well as play around with other "cosmetic" features. The phone I'm testing with is a 7971(color).
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Oct 28, 2012
I have an SRP547W hooked up as the office router with the standard office phones connected via the telephone ports at the back of the unit using 2 SIP lines as well as the PSTN by dialling hash first. We have just added a new staff member and bought an SPA303 with the intention of connecting it through registered SIP lines on the SRP547W, and hopefully have the facility to use the PSTN line when the SIP lines are busy.
The problem is, it connects to VLAN100 and gets its IP address and initializes fine however no lines show as configured and it can't make or receive calls. What do I need to configure on the SPA303 to tell it to use the SRP547W as its SIP Server/Proxy (not sure of the terminology).
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May 21, 2011
I purchased Linksys WAG160N (from a store) and I also have 7 Linksys SPA962 VOIP phones provided by MyNetPhone with service included. All tests we found out that this modem doesn't work with this VOIP phones. Somehow probably doesn't give access to MyNetPhone servers to get connection with this phones.I purchased an other one from DLINK and works perfect?
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Feb 27, 2011
Is there a device, which is able to produce a time delay on fiber optical link? I mean for example if one would like to reduce the power level of an optical signal, he could use simple air-gap optical attenuator on optical link. However, has somebody seen a device, which is able to introduce a time delay on optical link?
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Nov 13, 2011
Will ACL110 allow IP phones communicate with VoIP server. Do I need to add line to allow multicast traffic? [code]
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Jan 2, 2012
All of our VoIP phones bounced (re-registered) in the middle of the work day and we do not know why. There is no maintenance going on at this time. The phones came back up right away. Upon further investigation, I only found one error message on our core switch (WS-6509 running IOS ver. 12.2(18)SXF13) and I'm wondering if that was the cause:
Jan 3 13:51:04.030: %SIBYTE-SP-5-SB_OUT_OF_RX_DSCR_CH1: Out of RX descriptors on mac 0 - channel 1 (count: 299)
I cannot find any other instances of this error message from the internet.
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Apr 15, 2013
I am new to VLANs although I generally understand the concept. I have a small office with 25 desktop/laptops and 15 VoIP phones connected with a SG200-50 switch and on Port 1 I have the Cisco SRP541W router for DHCP and Internet access. My goal is simple: 1) Segregate the VoIP phones (voice) from the computers (data) and 2) Prioritize the VoIP phones traffic.
I believe this can be accomplished by setting up a second VLAN and maybe a third (if the default should not be used) and then identifying those ports as Voice VLAN ports. I guess I just need to know how to flag each interface and each port so that they all can talk to the router on Port 1 yet the voice and data will be in different broadcast domains. Also, do I need a management VLAN??
Is this setup correct? VLAN 1 - default (data) Port 1 (Trunk) (Tagged)Port 2 - 30 (Access) (Untagged)VLAN 2 - voice Port 1 (Trunk) (Tagged)Port 31 - 48 (Access) (Untagged) What should the interface settings be on each port (General, Access or Trunk)? What should the port VLAN membership be on each port (Tagged or Untagged)??
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Feb 15, 2012
I have a new ASA 5510 running 8.3(1) and ASDM 6.4(5)
I am trying to use the real time log viewer to troubleshoot some access issues, but I am getting delays of up to 30 seconds or more between my client connecting to the ASA and the corresponding events showing in the RT Log viewer. I am using a simple filter for source IP as it's quite a busy device.
I've seen an article that says to turn off certain logging IDs (such as 304001 from memory) which I have done, but no different.
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Jun 27, 2011
One of my 7921 phones disconnect ten time an hour and during conversations. Sometimes, people who call on this phone are redirected to the answer message.This phone is connected through WIFI network and Cisco Callmanager 4.2 manage all phones (we have about 80 phones on the network). I thought it was a problem with the phone but I exchange with another one and it's exactely the same problem. The problem is just for a line in particular. All the 7921g phones in my company are configured from mac address in the call manager. This problem occured after a storm but I'm not really sure that it's related to.
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Jan 4, 2012
I have a CUCM BE environment with a number of remote users with 8961 phones connecting to an ASA 5501 via AnyConnect. The phones register fine and can make inbound/outbound calls as well as four digit dialing to other users at the corporate site.
The problem is when a remote user tries to four digit dial another remote phone. The called phone will ring but there is dead air once answered and then the line goes dead.
This sounds like a routing issue to me. How to get AnyConnect clients to be able to reach each other?
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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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Dec 21, 2012
I purchased an Advent DT2410 about a month ago from PC world. It came with Windows 8 OS a USB wireless stick and the following basic spec:
Intel® Core™ i5-3330 processor
Genuine Windows® 8
Memory: 8 GB
Hard drive: 2 TB
So initially brought it home, set it up and fired up connected to the internet perfectly fine with the stick. Then about once every 2/3 days, it would pick up no internet connection despite being next to the router and after 2-3 shut downs in a row would work again. When the connectivity icon was blank, I would go to trouble shoot it and windows 8 wouldn't do anything, not even attempt to detect the problems (bare in mind this PC is brand new).So I leave my home by my University and came back to my parents for Christmas. Lugged my PC back with me and set it up.So first I connected to the wireless no problems, loaded up my favorite forums and after image hovering over about 3 images the 4th would only load the top 3rd of the picture. Open up new tabs "Connecting" until:
A) Server would time out
B) Wireless would DC and then reconnect (before basically repeating the "3 image view")
C) Would work for a few hours (e.g. a streamed film) before screwing up again (rare)
So, reinstalled drivers, replaced the USB wireless stick (802.11n.) AND STILL problems problems problems. I then cleared the IP/TC stacks (I believe they're called) did it through the elevated command prompt and still nothing. So i'm using my sister's laptop to write this as my internet on my PC barely runs long enough for me to be able to check this page or download the program mentioned in the sticky.
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Sep 25, 2012
I have setup the existing wifi router (couple of years ago) so do have the basic networking knowledge but am not up-to-speed with all the latest developments in the industry2. ISP have provided a '******' ADSL modem that i need to connect to get this whole netwrok working. its only supports ethernet connections - (i live in a third world country)3. I have installed a TP-link Wifi router (WR841Nd). The modem on stand-alone basis is fairly decent, covers decent range on ground floor (my house is fairly big and is double story building) but with few dead spots. It supports N series so speed is quite good as long as one is within range.
Problemi have been living with it for couple of years but since recently i have been experiencing a lot of drop-outs/random disconnections and slow speed. I have tested my wifi router at friend's place and it showed no signs of problems so it has to be my ADSL modem (phone line is fine, though i am not close to exchange but that is not an issues as my neighbours are using the same phone line/ISP and they dont have an issue)another problem i have is the coverage, my current wifi only covers the ground floor and i would like to extend this to upper portione am looking to change my ISP provided ADSL modem. The problem is i dont know if i buy an ADSL modem off amazon and whether it would work or not because the setup is not straight forward and the ISP staff is corrupt. They dont provide with quality hardware neither do they have technical competence so i literally have to beg them at time to at least come and see the problem.Question1: ISP provided ADSL modem replacementi know the settings for ISP modem so i can search how i can replicate the same with Billion but can this work?Question2: RAnge ExtenderI am thinking of buying couple of powerline wireless extenders from netgear.
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Aug 17, 2012
Ok, I have a huge problem with my wireless connection. It will constantly lose connection to the internet from my PC, IPod, Laptop etc. What will happen is a yellow warning triangle appears which tells me I've lost internet access. I have had the modem checked and replaced by the ISP with no success so it's likely that it's not a problem on their end. I've changed the wireless channel to move it away from my neighbours with no success.
Here is a copy of my ipconfig /all when the connection dropped out:
C:UsersKevin>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : Kevin-PC
[Code]......
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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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Oct 8, 2011
I have an ASA 5510 with its inside network connected to 10.102.247.0/24, interface 10.102.247.1. With the inside network i have got a router 10.102.247.42 routing to 172.16.30.64/255.255.255.240. The hosts in the network 10.102.247.0/24 have got as default gateway the asa 10.102.247.1.
Now the issue is that the hosts 10.102.247.0/24 cannot ping the hosts in the 172.16.30.64 network, only the ASA interface 10.102.247.1. I have added on the ASA route inside 172.16.30.64 255.255.255.240 10.102.247.42
i have added
same-security-traffic permit intra - interface
But nothing, I have tested one host in the 10.102.247.0/24 by adding a static route 172.16.30.64/255.255.255.240 to 10.102.247.42 and it is working fine.
So the ASA is not routing internally, Is there anything i can do, maybe NAT issue, nat(inside, inside) 10.102.247.0 10.102.247.0 net mask 255.255.255.0
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Aug 13, 2012
what happens internally when no shut command is given on the interface of router.The router interface goes up. How? What happen internally on the interface of the router?
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Sep 30, 2011
I found that the domain name was hosted at enom.com and the email was gmail. The web servers are both Media Temple servers.we updated the settings on the new server using google's instructions. However, it is still not working properly. So, to be as clear as possible, here is the specifics:
Email from the outside works fine, Email internal to external works fine, email internally (from one emplyee to another internally) will bounce giving a 550 error. After researching this error, I found that several people have had this issue, however, the majority of the fixes didn't work.
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Jul 26, 2012
ISP: comcast
Router: DIR-655
Hardware Version: B1
Firmware Version: 2.04NA
Currently, I have a machine attached to the router that has a webserver and ssh (fedora linux). The ports are successfully forwarded (in this case, tcp 80, and tcp 22), and from outside of my network I can connect. Also, I use dyndns.com to provide a domain name, instead of using my IP. The dyndns account is NOT managed by the router.The server I am trying to connect to has a reserved IP address.My problem is that from inside of my network, using the dyndns domain name, I cannot connect to my site.
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Aug 26, 2012
I've finally set up our RV220W to serve our office network, using the following environment:The WAN is set to a public IP (static configuration), while the internal network consists of two VLANs.VLAN 1 is connected to the cabled network and one wireless SSID, where DHCP is served by our Windows SBS server (192.168.15.x), and this VLAN is used only for our own office. VLAN 2 is connected to a second wireless SSID, where DHCP is served by the RV220W itself (192.168.17.x), and this VLAN is used for guests and visitors to our office.
On a regular basis, we need to use a mobile device to access a test page from a development server on VLAN 1, and the router is configured to redirect connections on a specific port on the public IP to our development server.For VLAN 1, I solved this by overriding DNS for the hostname of this test page to use the local IP for the development server.However, for VLAN 2, there is no way to access this test page.
Is there any way I can configure the router to either redirect these connections, or override the internal DNS so the test page on the development server can be reached also from VLAN 2 (the guest/visitor network)?
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May 10, 2012
i got an ea2700 and i cant get the external to work internally which i need for server tests now this has worked before on every other router i had without any editing done but this one doest allow that so what can i do to make it work with this router?
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Sep 17, 2012
Accessing exteral address internally.
I have a mail server, with external access which works fine for external access thorugh our router (a 1941). I have a laptop which connects to a wireless network that is inside our router. When attempting to navigate to the webmail or use outlook, it cannot connect.
The laptop is configured to access the mail through the external path as it would be offsite occasionally.
I think the problem seems to be that the traffic is not leaving the router to come back internally. The laptop can ping the external address ok.
I read about something called hairpinning - is this what i need to be looking at?
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Mar 15, 2011
Will I break anything if I create a second IP address on the physical external interface of our ASA 5510? I want to point it nowhere internally but want an active interface that can be vulnerability scanned but won't lead anywhere internally.
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Jul 1, 2012
I am working on adding a mapping to our external address for our mail server - let's call it mail.example.com
I would like to be able to access mail.example.com internally for our user's smartphones - if they access our company WiFi they are not able to get mail using the mail.example.com as the server name in their phone setups. However, once they leave the office and use any other WiFi it works fine. Also, I am unable to ping that address from any internal device. I believe also this is the reason Exchange accounts do not work on our site to site VPN connections.
I have a ASA 5520 and work primarily in the ASDM 6.4 to do configurations in the main office and have 5510 in our site to site connections.
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Jan 8, 2012
i want to know the definition of "Routing Delay in a network".
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Sep 17, 2011
I've got a strange problem with my internet connection. I have recently moved and brought my desktop with me. While I am able to connect to the internet in my new place, a weird problem arises: whenever I try to access a new webpage, there is a consistent 5-10 seconds delay before the page actually loads. After the initial delay however, the webpage will load quickly. This problem will repeat itself whenever I try to access a site that is not cached. I have tried switching ethernet cables/wireless adaptars and this problem persists. I have also tried scanning and cleaning my computer yet nothing works. Speedtest.net show that my ping, d/l and upload speed are all fine.
PS: Just to add some information, my new place comes with its own existing router (the building includes internet into its rent), and I am simply plugging an ethernet cable from my computer to it. In addition, my roomates and my laptop seem to be able to access the itnernet fine with this problem. Since this sounds a lot like a DNS problem, I have also tried using OpenDNS and that doesn't work either. In addition, the delay persists regardless whether I am trying to access a website via its domain name or numerical IP address.
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Jan 8, 2013
i'm having some problems to configure.i have two sites, a primary site and the secundary site, in both sites every switches are layer two. I configured and activated the RSTP (802.1W) in every switch, but about every 30 minutes the topology change and happening a delay in network and loss some ping (ICMP).
[Code]...
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Jul 16, 2011
I have one problem with our windows 2008 server when any user want to log in the domain from his computer, it takes long time. it takes around 5 minutes. I have installed DNS on the same AD Domain. Is that OK ?Secondly i have around 70 users and 4 ISPs.. Each ISP is used for specific data transfer. Each of the ISP is connected via ADSL Router to our switch?
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Jul 2, 2012
I have Cisco Catalyst 6500 with IOS Version 12.2(17r)SX5I need real-time monitornig of failed interface, to shut it administratively down and after 5 minutes "no shutdown" it.I think is good idea to use Cisco EEM for this task.My algorithm is below:
1. EEM script is looking for event about failed interface.
2. EEM script is shutting interface down.
3. EEM script is waiting 5 minutes.
4. EEM script is enabling interface.
I know how to configure EEM for steps 1, 2 and 4, but step 3 I do not.
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Apr 23, 2013
Any good way to force a serial link to delay packets to simulate a hi latency WAN link? Found this command so far:
Router(config-if)# transmitter-delay hdlc-flags
I can dial the speed up/down via clock rate all good but I need to also simulate latency. This is for simulating a WAN bonding scenario so I was going to aggregate a 10M ethernet port with a 2M serial and a 512k serial. But I need to also ensure varying latency.
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