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Loss of bandwidth ... What should I check please?
Good day, I just upgraded my internet service to Xfinity Blast! Pro... 250/10 Mpbs. Seems if I put a device through my SRX5308, I can not break 100Mbps. - I have upgraded the firmware to versio...
Hi Euther,
Welcome to the community! :)
Let us isolate the problem. Kindly answer the questions below:
a. Is the SRX5308 connected to a modem-only device or to a modem-router provided by Xfinity Blast? If ever the device provided by Xfinity Blast is a modem-router combination, I suggest you to set the modem-router to full-bridge mode so that it will be a modem-only device. This will make the SRX5308 the main router of your network wherein the Public WAN IP Address will be registered to it.
b. Since you have upgraded the firmware of the SRX5308 to v4.3.5.3, did you perform a factory reset after upgrading the firmware? If not yet, I suggest you to factory reset the SRX5308 then reconfigure the settings from scratch and observe if same problem occurs.
Regards,
DaneA
NETGEAR Community Team
DaneA,
Thank you for replying. I do appreciate it! Thank you for the warm welcome, too!
[Q] Is the SRX5308 connected to a modem-only device or to a modem-router provided by Xfinity Blast?
[A] The SRX5308 is connected directly to a ARRIS SURFboard SVG2482AC Eth Port 1.
[Q] I suggest you to set the modem-router to full-bridge mode so that it will be a modem-only device
[A] I see on the "At a glance" web page that Bridge Mode = Disabled. Is this what you are referring to?
When I click the enable button, this pops up: "Enabling Bridge Mode will disable Router functionality of gateway and turn off the private Wi-Fi network. Are you sure you want to continue?" I have the wireless disabled at this time, so I dont know if this is a big deal or not. Also, I have phone service connected to this device. Will this be impacted if I enable this option? Thoughts?
[Q] Since you have upgraded the firmware of the SRX5308 to v4.3.5.3, did you perform a factory reset after upgrading the firmware?
[A] I did not. Is there a preferred link I should look at for instructions on how to do this?
I am assuming the following:
Backup / Restore Settings
1) Save a copy of current settings
2) Revert to factory default settings. Click the "Button". I will need to find out the default name/password.
3) Restore saved settings from file
Yes? I have some LAN/WAN Rules too... anything special I need to do regarding those?
Thank you again!!
Perform a factory reset after upgrading the firmware?
Via, Backup / Restore Settings
1) Save a copy of current settings
2) Revert to factory default settings. Click the "Button". I will need to find out the default name/password.
3) Restore saved settings from file
4) Rebooted.
5) Disabled all FW rules
6) Speed Test Results (Same Server): 60Mbps (D) / 11Mbps (U)
[Q] Is the SRX5308 connected to a modem-only device or to a modem-router provided by Xfinity Blast?
[A] The SRX5308 is connected directly to a ARRIS SURFboard SVG2482AC Eth Port 1.
As I have checked about the ARRIS SURFboard SVG2482AC here, it is a combination of cable modem and router. Since the SRX5308 is connected directly to ethernet port 1 of the ARRIS SURFboard SVG2482AC, you have a Double NAT scenario wherein a router (the SRX5308) is connected behind another router (which is the ARRIS SURFboard SVG2482AC).
To learn more about Double NAT, kindly access the article below:
[Q] I suggest you to set the modem-router to full-bridge mode so that it will be a modem-only device
[A] I see on the "At a glance" web page that Bridge Mode = Disabled. Is this what you are referring to?
When I click the enable button, this pops up: "Enabling Bridge Mode will disable Router functionality of gateway and turn off the private Wi-Fi network. Are you sure you want to continue?" I have the wireless disabled at this time, so I dont know if this is a big deal or not. Also, I have phone service connected to this device. Will this be impacted if I enable this option? Thoughts?
Yes, the Bridge Mode is what I am referring to.
I found this forum link online here, it says on a paragraph there (by EG) that the ARRIS SURFboard SVG2482AC can be put in to bridge mode so that it acts only as a cable modem with phone support.
As I have mentioned from my initial response to you, setting the ARRIS SURFboard SVG2482AC to bridge mode will make the SRX5308 the main router of your network wherein the Public WAN IP Address will be registered to it. Kindly read Option 2 on the article below:
How to fix issues with Double NAT
I suggest you to to set the ARRIS SURFboard SVG2482AC to bridge mode then check what download/upload speed you will get through the SRX5308.
Regards,
DaneA
NETGEAR Community Team
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