Actually, we've updated our SA540 to 1.1.21, it seemed that the dns problem in optional port is resolved. But now we have another problem: the ping to the WAN port is not stable. Once we can ping to the WAN port from outside, after the rebooting, it stop to response to the ping. We've tried to reboot it several times, nothing changed. Any help will be appreciated.
You might be having the same problem I am. We have a 10 MB line that needs to be configured for 10MB full duplex otherwise it won't stay on and it will go to disconnected state. Unfortunately, I'm not able to change the port in the "Port Management" section to 10 as only 100 and 1000 are available. It is something to look into.
I also am having the same issue with the SA540. I started with the wan connection dropping out every
couple of minute with the firmware 1.0.12 and was advised to upgrade to the latest firmware which I did
(now 1.1.21). Now after rebooting multiple times the link lights come back on but NO WAN connection.I
have 100Mps down and 15Mps up speed via a Motorola SBV6220 Cable modem DOCSIS 3.0. I upgraded
to the SA540 from my version 1 WRVS4400N and thought I was going to get some better and more
reliable performance. I am waiting for the Cisco Engineer to email me the CASE # and RMA info because
their system was down!!!!! How am I supposed to feel if a brand new product fails and the customer
support cannot issue the needed info because they do not have the info available to them to help trouble
shoot the problem and then find out that their own equipment is not up and functioning?
Leaves me with a lot of questions and a very uneasy feeling!