I know its not the cable because if I connect directly to my modem I get around 90mbps but once I connect to the Linksys E2500 it drops it 9.5mbps again, power cycling the pc, router and modem does not solve the issue nor does switching ports on the router, the issue lies with the router, but where? A setting?
Thanks!
Linksys E2500 Manual
Oct 9, 2014 - My wireless speed test results: 23 ms ping, 41 mbps download, 12 mbps upload wired speed is 100 + mbps How can i configure e2500 linksys router. The actual download rate will be much slower than 54mbps because.
From DD-WRT Wiki
[edit] Introduction
[Culled from DD-WRT Forum thread Critical DSCP bug Affecting WiFi Download Speeds on Comcast]
There is an edge case interaction between Comcast IPv4 DSCP and improper condition handling in the WMM driver in certain Linksys/Cisco eSeries routers (and possibly others as well) which results in very low download speeds. This issue can appear in both stock and third-party (DD-WRT) firmware, although Cisco appears to have at some point released new WMM drivers that largely resolve the issue in current stock firmware.
The cause is that IPv4 packets from the Comcast network are configured with DSCP 8, which the driver handles improperly, whereas other providers typically use DSCP 0, which the driver handles properly. (Both are valid values.)
[edit] Symptoms
Download speeds are normal with current stock firmware, and on wired connections with DD-WRT firmware, but are much lower (possibly even less than 1 Mbps) on wireless connections with DD-WRT firmware even with strong signal.
To see if you are getting the problematic DSCP, you can look at your downloaded IPv4 packets with Wireshark, preferably directly connected to WAN, but you should see them even on Wi-Fi. (See Add DSCP Column in Wireshark)
[edit] Testing
To test this fix, open a Telnet or SSH connection to DD-WRT, and run the following commands (copy and paste to avoid typos):
Assuming there are no errors, check download speed on wireless.
[edit] Configuration
To save the fix so it survives reboots, navigate to Administration > Commands
In Command Shell, enter Commands (copy and paste to avoid typos):
and click Save Startup.
In Command Shell, enter Commands (copy and paste to avoid typos):
and click Save Firewall.
[edit] Methodology
This fix changes DSCP header information in all packets to DSCP 0 when they arrive at the WAN interface of the router, which the WMM driver handles properly.
[edit] References
- Forum thread Critical DSCP bug Affecting WiFi Download Speeds on Comcast
- Wireshark