Wired Intelligent Edge

We currently have an HP Procurve 2650 which was not configured by me and I have no idea how, but it's set to use a default gateway and ip routing.  It has the default gateway set the same as the switch default vlan ip.  We are currently replacing our older switches and I cannot achieve the same result with the newer HP 2920 Switch.  Here's the current config from the 2650: 

Running configuration:

; J4899B Configuration Editor; Created on release #H.10.31

hostname "CTHSIDF1 2650" 
snmp-server contact  
time timezone -480 
time daylight-time-rule Continental-US-and-Canada 
interface 50 
   name "GIGWAN" 
exit
ip default-gateway 10.48.59.254 
sntp server 192.43.244.18 
ip routing 
timesync sntp 
sntp unicast 
snmp-server community "sbcss" Operator 
snmp-server community "bvusdsnmp" 
vlan 1 
   name "DEFAULT_VLAN" 
   untagged 1-49 
   ip address 10.48.59.254 255.255.252.0 
   no untagged 50 
   exit 
vlan 306 
   name "GIGWAN" 
   untagged 50 
   ip address 10.48.7.223 255.255.252.0 
   exit 
ip route 0.0.0.0 0.0.0.0 10.48.7.254 
password manager
password operator

Thanks for any help.

The

ip default-gateway 10.48.59.254

is a misconfiguration and you should not be perpetrating the same thing on your new switch config.