Very Slow Internet With Comcast Performance

Feb 5, 2012

I just moved into a new apartment. It has Comcast performance internet (16mbps). However im not getting anywhere near that. I have it connected via ethernet.

I tried and my result was 1mbps download. ping of 225. Web windows take forever to open

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Comcast 20Mbps Slow Internet Through Router

Jan 24, 2013

I have Comcast 20Mbps internet. When I'm on the Mac partition of my computer, I get 15Mbps download and a ping of less than 10 on When I'm on my Windows partition, I get a ping of around 250 with a download speed of 1.5Mbps. I read posts where people said disabling their firewall worked, so I disabled mine and it made no difference.

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D-Link DIR-655 :: Comcast Internet Speed Gets Slow?

Nov 13, 2012

Recently I have noticed my internet get slow.  I use a comcast cable internet connection that is directly connected to my dlink DR 655.  I use the megapath internet speed test [URL] when testing my internet speed.  Have a laptop that is usually on wireless and an XP workstation that is connected to the 655 directly with static IP.

I would be browsing the internet and all the sudden the internet would get really slow.  This would happen on both my desktop and the laptop and my speed test on both machines would be around .3 Mbps.  When this happens I would go and connect the laptop with the ethernet pot directly to the modem.  Of course a reboot of the modem has to occur before a connection can be made so once I do that all the sudden my internet is back up to par (12 Mbps).  I go ahead and put my network back to the way it was and it all goes back up to 12 Mbps.  I have called comcast several times and they are telling me it my router.

This picture shows a snapshot of some windows from the laptop.  The CMD ipconfig on the bottom left shows the laptop network settings when connected directly to the modem.  The CMD ipconfig on the upper left is the network settings when connected to the router.  The web page on the right shows the WAN network settings when the 655 is connected to the cable modem.

Notice the DNS servers, they are different when the 655 is connected to the modem versus when the laptop is connected to the modem.  Could this be part of my problem?  I have not seen were I can manually change 655 DNS entries ... is there a way to do this?  Or should I not even be worried about it?

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Cisco Switching/Routing :: 861 Router - Slow Internet Performance

Jul 21, 2012

I have a new 861 router which I have connected to my home broadband cable modem. Got it all working okay and I have access to the Internet but its not as fast as it is if I connect my laptop to the modem.
My Internet is 60mb (was 100 but I downgraded). When I cannot my laptop directly to the cable modem, I get 60mb download speed on If I connect the router's WAN port back to the modem then I roughly get about 40mb, sometimes even 50.
I do not have any IOS firewall configured on the router, just basic ACLs to stop SSH and TELNET from public networks. If I do enable firewall then my Internet connection halves itself. I have read around that this is the case with ios firewalls on these small routers so I've disabled the firewall but I still don't know why I cannot get full Internet speed.

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Wireless Slow After Getting Comcast?

Jul 13, 2011

I just got Comcast at my house and I'm having major problems with my wireless speeds. I was on Frontier until today and both the wired computer and the wireless would download at the same speed and have the same ping. Today, after comcast, the wired computer is downloading at about 70 megs a second, and the wireless is at about .3 megs a second. I turned off the security (I'm in the country, no security needed) and changed the channel. I went to ASUS to get the newest wireless driver...

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Comcast Speeds Real Slow

Feb 26, 2011

I had recently switched to Comcast Xfinity Blast internet. I ordered the service with 22 mbps. Now when I download something, it becomes a challenge for the download to get faster than 500kbps. I don't understand, It should be a lot more. If it stays at this rate, than there would be no difference between my current and previous service.


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Cisco WAN :: Slow Speed Over Comcast 50 Mb Using 2951

Apr 11, 2012

We have 50 Mb Comcast cable conencted to 2951.  There is another conenction to AT&T 20 Mb circuit which goes thru' an ASA 5510.  Path to Internet is as below. [code]
As long as Comcast is up, 2951 sends Internet traffic out to Comcast and uses AT&T via ASA for backup.When traffic goes over Comcast, users complain about slow speed out to Internet.  If we force traffic to AT&T via ASA, speed issue goes away.
We don't see any issue on 2951 router in terms of CPU or memory util.WHat can cause slow speed despite the fact that router resources are not maxed out and Comcast circuit has 150% more capacity than AT&T?

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Intervlan Performance Is Slow Over Time

Nov 12, 2012

my switches layer 3 intervlan routing performance is dropping.What would cause this performance drop? I am not pummeling the switch with massive transfers constantly like an enterprise envirnoment would do or a colo center.

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Cisco WAN :: Why 2811 Performance Is So Slow

Dec 18, 2011

I recently inherited a small network. There is an existing 1.5mbps Internet connection (fa0/0) (includes MPLS as well/same provider). We added a new ISP that allows for 50mb down/5mb up. I added the new ISP to fa0/1 and modified the NAT overload statements accordingly. I alo changed the default route to ONLY use the new, faster ISP connection. Using, I am only able to get 6 to 10mb down, most of the time. if I plug a laptop into the cable modem then I get 37 to 50mb down. Why the 2811 is so slow?
I have attached the config and various show outputs (nat, sh ver, memory, etc.). the file called "latest logs" contains a "sh ip traffic, sh int switching and a sh proc cpu sorted". [code]

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Cisco VPN :: RV042 Slow VPN Performance

Feb 9, 2011

I'm experiencing quite a slow vpn performance. I've tested different scenarios.
* Windows XP with built-ín pptp client and Shrew ipsec client
* Linux built-in pptp
* wireless and wired connections
I never managed to go above 1MBps neither with windows or linux. I managed to go up to 3MBps using the Shrew client.I've also checked mtu settings and everything seems to be fine.

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Networking :: WRT54G Very Slow Performance

Feb 24, 2012

I have a shitty WRT54G right now, and its slow as heck. I was thinking of getting this:

URLS ,I know the later is a modem and a router as opposed to just a router in the first link.I have comcast, I hear it uses Docsis 3.0 right? Mine is a 2.0 modem right now.

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Cisco WAN :: 1841 - Very Slow Performance

Jan 29, 2011

Below is configuration for 1841 and causing slowness both from inside and outside connections?
Building configuration...

Current configuration : 2784 bytes!version 12.4service timestamps debug datetime msecservice timestamps log datetime msecno service password-encryption!hostname Router!boot-start-markerboot-end-marker!no logging bufferedno logging monitorenable password password!no aaa new-model!resource policy!mmi polling-interval 60no mmi auto-configureno mmi pvcmmi snmp-timeout 180ip subnet-zeroip cef!!no ip dhcp use vrf connectedip dhcp excluded-address!ip dhcp pool 0   network   netbios-node-type h-node 

[Code] .......

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Cisco WAN :: Slow Performance With FWSM In Different DMZ 6509

Aug 8, 2012

i am feeling an issue related to 2 x 6509 with fwsm.
Mod Ports Card Type                              Model              --- ----- -------------------------------------- ------------------ -----------  1    6  Firewall Module                                                 WS-SVC-FWM-1        2   48  CEF720 48 port 1000mb SFP                            WS-X6748-SFP        3   48  CEF720 48 port 10/100/1000mb Ethernet            WS-X6748-GE-TX      4   48  CEF720 48 port 10/100/1000mb Ethernet            WS-X6748-GE-TX     5    5  Supervisor Engine 720 10GE (Active)                   VS-S720-10G     
Hw    Fw           Sw           Status ------------ ------------ ------- 4.3   7.2(1)       4.1(2)       Ok 1.12  12.2(14r)S5  12.2(33)SXH3 Ok 3.0   12.2(18r)S1  12.2(33)SXH3 Ok 3.0   12.2(18r)S1  12.2(33)SXH3 Ok 2.1   8.5(2)       12.2(33)SXH3 Ok
on fwsm we have different dmz for different application. mostly of Oracle (1521 port) to application means seperate one. problem is oracle people reported the slow performace when exporting dump from once vlan to another. before that they are using 3com technology (network) and on this its ok. time difference is double from old to new.
i had sniffed the traffic also and found alot of TCP OUT OF ORDERS errors. i read that this is the bug which is resolved in 4.0.

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Upload Speeds Extremely Slow Using Netgear FVS336G Dual WAN Router On Comcast

May 22, 2011

Download speeds, per and speakeasy, are about 20mbps.When the speed test gets to the upload part, it usually hangs or takes a long time before giving me a result of about 0.04mbps. Basically, it's so slow, it sometimes just gives up and times out.This translates into a real shoddy internet experience because something as simple as choosing airline tickets requires your computer to "upload" your choices. And of course, if that doesn't happen within a certain amount of time... Timeout! I have tested the connection without my Netgear FVS336G Dual WAN router in the way and it is much better so I'm certain it's the router.When I tell the router to use WAN 2, which is where my AT&T DSL connection is on, the upload works just fine (about .4 mbps - I'm provisioned at 512kbps so it's fine).Also, this is the case on ALL computers on the network - wired, wireless, PC, Mac, iPhone, iPad, you name it. So, it's definitely not device specific.

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Linksys Wired Router :: RV042 Slow Vpn Performance?

Feb 10, 2011

I'm experiencing quite a slow vpn performance. I've tested different scenarios.* Windows XP with built-ín pptp client and Shrew ipsec client* Linux built-in pptp* wireless and wired connections? I never managed to go above 1MBps neither with windows or linux. I managed to go up to 3MBps using the Shrew client.I've also checked mtu settings and everything seems to be fine.

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Linksys Wireless Router :: Slow WAN Performance On EA4500

Jul 2, 2012

Just bought the EA4500, updated with the latest cloud firmware. but Wan performace is BAD. download with router 31.56Mbps, without approx 120 Mbps, tried changing MTU from auto to 1470 but no succes.

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Cisco Switching/Routing :: 3750G Stack Slow Performance

Nov 19, 2012

I am currently having performance issues running a 3 x stack 3750G (different models) as a core for a network of roughly 12 x distribution switches. [code] As above, I have a 12 port Fibre switch and 2 x 3750G-48 port switches. [code] I tried to change the SDM to route but hit another issue where the 3750g-48 does not support SDM route so I had to revert back to desktop VLAN.Could the SDM Template be the reason for slow performance? If so which SDM Template should i use as this is the Core L3 switch.

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Cisco Routers :: RV042 To RV082 Tunnel / NAT-T And Slow Performance?

Feb 18, 2013

I have an RV042 VPN tunnel with an RV082.The RV042 has a public IP Address obtained by PPPoE, the RV082 has a public IP Address obtained via Static IP.The problem I see is a really slow performance. Both internet conections are idle and the performance is about 2 or 3 kbyte/s My question are if I should I enable any of this:

- Agresive mode
- NAT Traversal
- IP Compresion
- Dead Pear Detection
How can I troubleshot this slow performance?

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Cisco Firewall :: 5520 Slow Performance Through Site To Site Vpn

Mar 12, 2012

I'm having slow performance thru a Site to Site VPN. I have an ASA 5520 in each site with the version 8.2(4) in both ASA's. I have a 20Mb internet service in one side and in the other side I have 50Mb. When I transfer a file from the Sita A to Site B I get a transfer rate of 130KB/S.

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Comcast Internet - Can't Find My Network Key

Oct 13, 2012

My mom just got comcast internet for the restaurant but I can't log in to it with my laptop because i dont know the network security key i looked under the smcd3g-ccr router but no network key only find theses labels, Model Name, Smc P/N, P/N, S/W Rev, H/W Rev, R/F Mac, Wan Mac, S/N, and Iden:1033, But no network key or wep label. I tried logging in the router with default gateway and entered cusadmin for login and highspeed for pass and in the router there is no wireless tab, NONE, so I can't find the ssid or wep key ill show you a picture for the homepage [url]...

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Wireless :: Comcast Wifi Connections Bump Internet Off Another Pc

Feb 17, 2013

When we got broadband through our cable provider (Comcast), we were sold a single user license even though we were explicitly connecting two computers.Upgrading to a multi-user subscription (for up to 5 connections) solved that.I'm currently trying to configure 4 computers to connect. I have noticed that if a configuration for one has WPA and another has WPA-2 they will bump.This may be true for differences in WEP-keys, TKIP setting, etc. If you do new configurations, the settings may revert each time to a default, which you may not notice.Keeping the network settings matched may work. Using a portable memory device to run a saved configuration on each machine can improve their synchronization.

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Comcast Wireless Internet Connection Via Cable And Router?

Jul 10, 2011

We have Comast internet using an Arris modem and have a Netgear wireless router. We have our modem hooked up to a desktop computer that we don't even use. We have three laptops that we us with our wireless.Comcast has told us that we have to have the modem hooked up to the desktop for the internet to work.what do people do who have only a laptop and have wireless internet in their house?Is there anyway to get rid of the desktop and have the modem hooked directly to the cable and router?

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Comcast Modem / Netgear Router - No Internet On New Desktop

Feb 15, 2012

I hav a laptop conecteted to the internet with comcast service and a netgear wireless router that works fine. but bought a desktop and when i hook it to the router i get no internet. im running windows 7 ultimate on both machines. i am gettin a thing saying unidentified network in my network settings and i called comcast whent through resetting the modem and router with them and nothing then they tell me i have to pay them to run another machine of of my router this is ridiculas i have the machine pluged into the port on the router with anethernet cable everything is hooked up right i know this im pretty computer savy as ive built many machines in the past.

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Apr 15, 2011

Is it possible to access the internet directly using the provider's hdmi cable routed through a generic device?

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Comcast Business Internet Upload / Download Simultaneously

Dec 22, 2011

I just got installed a business class internet service installed. Got the 25/5 line and when I perform the speed tests I get well above that with the speed boost on the lines.When I am downloading large files I am getting a constant 22-25 down and when I am uploading files I get the 5 up.... But I can't do both at the same time.What happens if my uploads kill my download speed so if I am uploading a file and taking up my 5 up it makes my download speeds about 2-3.. Comcast is saying that this is how the network works and I just don't want to accept that at this time as I have other internet providers that don't work this way and I get a true up/down at the same time. Unfortunately at this location that I am dealing with Comcast is the only choice.

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Cisco WAN :: 3930 Comcast EDI Ethernet Dedicated Internet Setup

Dec 22, 2012

We have purchased Comcast fiber EDI services. They run a fiber to our office and connect to a Ciena 3930 switch. The speed we have is 30 down and use for Internet. Comcast provide a /30 and /29 address. Do I need an additional router to route /30 to /29?  I only have a PIX firewall.

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Belkin Basic Router Is Connected To A Comcast Modem But No Internet Access?

Nov 27, 2011

My neighbor is using my Belkin Router the basic one and has comcast. We both use his internet and have had no problems until the past 3 days. He just got the home phone service from comcast and the phone line is setup through the modem. Ever since comcast came to his apartment and set this up the home phone service to his modem the router is connected but there is no internet access. What is going on and how can I fix this. He has an HP with windows Vista and I have a Toshiba Satellite L675 that has Windows 7 Home premium edition on it.

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Linksys Wireless Router :: E3200 Loses Connection To Internet Through Comcast

Jan 24, 2012

I have a problem with my E3200 that has happened at least 4 times since I first purchased, installed and configured it.  Initially I thought it might be something with Comcast, but a) I never had the problem with my Linksys WRT54G router and b) It seems I can now duplicate the issue by saving a config file and restoring it.The specific issue appears to be somewhat random.  At some point the connection to the Internet simply stops for no apparent reason.  I am able to ping the router and connect to it.  I am also able to drop and renew connections to the cable modem successfully.  Furthermore, I can ping my network side of the router, as well as the external address handed to my router by the cable modem, and the cable modem gateway address, but still no connection to the Internet.The only solution to my problem has been to restore the factory defaults to the router and reconfigure it from scratch, which does seem to fix the issue for a time until it occurs again.  FYI, I do not use the Cisco connect software because I have several custom port and QOS configs that are necessary for an IP Phone and other hardware on my network.

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Linksys Wireless Router :: E900 Comcast Xfinity Internet Speed

Apr 18, 2012

I just recently purchased comcast internet today and self installation kit that came with the modem and all..... got it all set up no problems activated did speed test directly from cable modem to laptop computer wired and was getting 10mbps down and 3mbps up well went out and bought a linksys e900 wireless router.... connected it no problems... however my laptop wireless and phones connected to the router with speedtest is only getting 300kbps down average!!! but the upload is still 3mbps.

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D-Link DIR-615 :: Internet Activity Light Blinking Non-stop With New Comcast Connection?

Jan 21, 2011

I recently switched from a DSL ISP (Earthlink, Zyxel modem configured as a bridge, pppoE connect) to a cable ISP (Comcast, Arris cable modem, dhcp connect). Basically PC --> DIR615-->Cable modem-->Internets. With the old DSL the Internet activity LED (green, looks triangular) on the DIR615 blinked only when internet activity occurred. With the new Comcast connection it blinks non-stop about 5 times a second! Even if the PC is turned off it blinks. It stops blinking if I disconnect the ethernet cable between router and modem. The connection itself is fine, but if the DIR615 is doing something it should not be doing it might slow the connection down a bit, (or burn something out prematurely?)FYI, the Arris cable modem does not seem to be a router. It takes a cable connection from outside and provides a single ethernet cable and 2 (voice) telephone cables to the house.

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Linksys Wireless Router :: Wrt54gs Switch From Dsl To Comcast / Now No Internet Connection

Jan 5, 2011

Hard wired network (15 workstations.) I had a dsl modem connected to my network switch and linksys wrt54gs router connected to that modem. All hard wired workstations had internet access AND there was a wireless internet connection. With any wifi device I could access the internet.I switched from dsl to comcast. All hard wired work stations still have internet. but when I plug my wireless router into the modem (comcast business IP gateway) there is no wireless internet connection. The hard wired workstations can still get online and there IS a wireless network, but it does not allow internet access (page cannot be found etc.)
Comcast says it absolutely should work. Linksys says it requires simple reconfig of router settings (reset router, clone mac address.) I have read knowledge base articles from linksys and followed each step. The lan ports of the modem are all working if I connect to them directly with a laptop and cable. I have reset router multiple times, cloned mac address, dhcp release/renew. 
My physical connections are correct.  In the router set up utility, I can see the mac adrdress and ip address but can't tell if the IP is from the modem or the router. Default gateway is always in the router AND in any workstation ipconfig screen. Ip addresses are 192.168.1.xx in ipconfig at any workstation AND in the router set up status. 
I cannot access internet via router even if plugged directly into it. It is as if the router is not getting the correct information from the modem. However, it worked perfectly with the DSL modem the day before we changed.My workstations are all hard wired and work. I simply want to have Wi-Fi also... for phones and laptops w wireless etc.

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How To Increase Internet Performance / Signal

Jul 5, 2011

I currently have a dlink dir-655 in my basement. my computer on the second floor is connected via DWA-160. I Only have around 2-3 signal bars, and never get the 300mbs like described. i would like to know all the possibilities to extend my range (to have 5 bars) or get better connection speed. do you recommend an access point or an extender? Which models? also, if i have an dir-615, can i use it as an acesspoint/range extender for my computer on the 2nd floor? if so, how? I am looking for the cheapest alternative in order to have better signal and speed. The modem is stuck in the basement therefore I cannot move it.

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D-Link DIR-615 :: Performance Dropped After New Internet?

Jun 9, 2012

Despite all the drama regarding the DIR-615, I've had the B2 revision since around late 2008 or early 2009 (can't remember exactly, most likely late 2008) and it had been working flawlessly. And I do mean that. I never once had a problem with this router and highly recommended it. Back then I was on a 24/1 connection, and had been up until recently.

Now I'm on a 100/10 line, and things haven't been looking too great. The internet is stable for the most part, and I am getting full speed, but the router has been starting to drop its connection a lot. I've had to release -> renew (or simply restart the router) quite often now and it seems to be happening at complete random.

weaking with settings, updating firmware, etc but no luck. All connections in question are of course wired, not wireless.

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