Contributor
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68 Messages
Cannot ping Comcast gateway IP after maintenance outage
Hello,
I experienced a problem this morning after a planned Xfinity maintenance outage. After the outage, I rebooted the Modem and my router pulled a new WAN IP address (DHCP), however, the IPv4 Gateway monitor in my router was showing 100% loss and I could not get out to the internet via IPv4.
The IPv6 interface, however, seemed to be working fine.
Looking at the router logs I noticed this message repeating many times:
Sep 16 05:38:00 kernel arpresolve: can't allocate llinfo for 71.226.124.1 on igb0
I attempted to ping the Comcast GW (71.226.124.1) from my phone via LTE but got 100% packet loss result.
Does this mean the Comcast gateway is down?
Investigating further, I looked at the router: Status/Interfaces/WAN and observed that Comcast has me allocated on a /22 subnet. So I manually changed the Gateway monitor IP in my router to 71.226.126.1 which is on the same /24 block as my WAN IP.
Now the gateway monitor is green (no packet loss) and I can access the internet via IPv4.
Looking at the router logs again, I am periodically seeing this message:
/interfaces.php: Removing static route for monitor 71.226.126.1 and adding a new route through 71.226.124.1
Should I call Comcast/Xfinity and get a trouble ticket started?
BTW - also posted this question on the Netgate forums:
https://forum.netgate.com/topic/161391/arpresolve-can-t-allocate-llinfo-for-gw_ip-on-igb0
XfinityThomasA
Official Employee
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2.2K Messages
3 years ago
@azdeltawye - Hello. Thank you for your detailed message and for commenting here on the Xfinity Forums. I know I'd be wondering that same thing too! Had you tried using the Xfinity My Account app to troubleshoot your Xfinity services?
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