Fixed Cacti not displaying interfaces for HP 1810G switch

While implementing a new network for a customer, we took an existing HP 1810G 48-port switch under management. As per normal, we setup monitoring (Icinga) and graphing (Cacti), but while the switch responded to Cacti sysname polls (leading us to believe it was happy), it didn’t return any interface details, so we weren’t able to graph anything.

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