I have 2 Catalyst 3750 switches. And I need to connect them accordng to this scheme (see an attachement). I also attach parts of configs and ping's listing.
What have I done wrong?
Perhaps command 'interface bvi bridge group' is not supported even though switch may accept it without giving any error. You can confirm this by checking configuration guide of your code. Look into section 'Unsupported Commands'
If that's the case than you can configure SVI interface instead and assign it with IP address and bridge group.