I've got a new Cisco esw 520 8-port switch. It's configured so that the ip address is the same as the rest of the lan, 192.168.2.xxx. If i plug a PC into it via ethernet cable into any of ports 1-8 I can connect and configure it. If I connect another ethernet cable into ports 1-8 and then into the wall socket which takes it into a cisco 48 port switch I can't connect to anything beyond the 8-port switch. I tried plugging the rj45 from the wall socket into the uplink port in case that made a difference, still nothing.
The ip address and username/password to access the config utility are the only things that have been changed from default.
I'm sure I'm missing something obvious here. 500 points to the person who puts me right.