I have two issues with my residential router EPC3925 which uses firmware epc3925-ESIP-16-v302r125573.
The ISP has not been able to help because they have no knowledge about this stuff.
The first problem is related to the UPnP feature, when the SmartTV is connected to the network the router becomes unreachable with the effect of being impossible to use Internet with all the computers of the LAN.
The problem happens everytime that the TV or the computers send a M-SEARCH broadcast request that causes the router to be unreachable for some seconds, so even pinging it fails.
Disabling UPnP on the router doesn't solve the issue.
The second problem instead is related to the rj45 ethernet interfaces on the router because if one or more computers go in sleep mode sometimes the router will emit a high pitch noise and is completely freezed, it's necessary to switch it off and on to restore the situation.
I would like to know if these issues are known and how to fix them.
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