Hi all I'm a newbie poster and am typing this a second time because my first submit of the thread timed out on me.:frown: I'm having a problem with my BEFSX41 router where it's slowed down terribly and now has stopped routing altogether. I have a single PC and a Vonage VoIP MTA (Motorola VT1005) on the LAN side of the router connected to a Linksys BEFCMU10 cable modem on Comcast HSI with 6000/384 speed "silver package" service. I've had this configuration for 3+ years with only an occasional drop from Comcast and a repeated router reboot problem 2 1/2 years ago that was fixed by a firmware flash to version 1.50.9 About 3 days I noticed a very steep drop in traffic speed from LAN to WAN and WAN to LAN. So bad that my Vonage started acting very unpredicable and effectively useless for making call. Web browsing had also slowed to a crawl. Here's what's gone on so far. BTW, I'm a software/harware performance engineer so I pretty familiar entire system and how to troubleshoot. Using PingPlotter and several internet speed tool running on the PC I was able to isolate the problem to the router. I normally get 6Mbps downlink and ~350Kbps uplink speed on from the PC thru the router and cablemodem. After the slowdown, I measured ~200Kbps downlink and ~25Kbps uplink speed. Connecting the PC's NIC directly to the cablemodem, bypassing the router, I was again measureing full 6Mbps/350Kbps speed. With the router back in line PingPlotter revealed that 70-80% of outbound packets (LAN to WAN) were being dropped. I got on an online chat with Linksys support and the concensus amount 3 reps, one a Sr. Tech, was that it might be a known issue and that I needed a firmware flash to the current version. All that had been done so far was my troubleshooting and removing the router from the line so I could get enough speed to get in an online chat, most importantly no router changes other than a few power cycles I tried when trouble shooting. When I went to do the firmware flash yesterday I ran into more problems trying to put the router back in line. With router back in line between the PC and the cablemodem I couldn't get an IP addr at the PC from the router's DHCP server. Got on the phone with Linksys support. Here's how the call(s) went. Call 1 (20 min. in queue): After a 2.5 hour call to India with a pretty inexperienced call center Tech I got hang up when she got frustrated. In the 2.5 hours all she accomplised was about 20 useless tasks from her troubleshooting script, all thing I explained to her I had already done myself, but the she insisted on doing with me while on the phone. It as all the novice stuf like swap cables, got directly to the cable modem, run ipconfig, etc. IHO, the only thing of use she did was to power cycle the router and the cable modem when both were connected. Result still no IP from the router DHCP server, then the hang up. Call 2 ( 2 min in queue): Another call to India again with another inexperienced Tech that after 1 hour transfered me to a Sr. Tech who hung up on me within 5 minutes because I asked to explain to his thought process and why he was asking to do things. However, this Sr. Tech did acocomplish something. By lowering my NIC speed to 10Mbps full duplex I was able to get an IP addr from the router, but we then found in the router's status page that the router wasn't getting an IP from the ISP on the WAN side. When I asked him to explain what he wanted to do he hung up. Call 3 (35 min in queue): This time the call goes to Maylaysia where another inexperienced Tech at least noticed I was having problems with them and put me on hold for 20 min. for her supervisor to try to transfer me to another Sr. Tech. This time the Supervisor left me on hold for another 25-30 min before coming back to say the transfer buttons on her phone weren't working. She takes my number and promises a call back in 1 min. Call 4: Supervisor calls me supposedly from Sr. Tech's phone and finally I get a someone thats seem skilled, patient, and willing to explain his reasoning. Another 3 hours. We flashed the firmware to the most current version 1.52.10 (I was on 1.50.9.) with the hard reset, upgrade from admin page, reset, power cycle process. Same results each time according to the router's status page no IP on the WAN side from the ISP DHCP server. One of the latter times he put me on hold to go "confer with another tech" I ran a experiment on my own.:wink: I got the ISPs IP info by connecting the PC's NIC directly to the cablemodem and did an "ipconfig /renew" then took that and set the router to a static WAN IP with that info. Voila, router is routing again. However, PingPlotter is still showing 80-85% outbound packet drops and it stops working (100% drops) after about 5 min. He was shocked! We flashed the firmware 2 more times to try get the routing back, but no luck. It's same a before. LAN ports only work only at 10Mbps link speed and no routing with either dynamic or static WAN IP config. I suggested to the Sr. Tech that I thought the WAN port may also be not functioning at 100Mbps and that it needed to be set lower. He said he doesn't know a way to do that and the my router needs to be replaced. Please, I'm at my wit's end here! Any help, idea, or suggestion on how get routing working again and get the port speeds funcitoning at 100Mbps would be greatly appreciated.