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Unable to connect ssh to beaglebone black

I download the latest ti-SDK On beaglebone black,and succeed to running on emmc on the board.I use DHCP to get the ip address,if i type "ifconfig",i got the messages as follows from uart.

am335x-evm login: root
root@am335x-evm:~# ifconfig
eth0 Link encap:Ethernet HWaddr C8:A0:30:B0:32:1D
inet addr:10.0.0.22 Bcast:0.0.0.0 Mask:255.255.255.0
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:346 errors:0 dropped:131 overruns:0 frame:0
TX packets:133 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:69095 (67.4 KiB) TX bytes:25104 (24.5 KiB)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

I can ping 10.0.0.22,but i can not use ssh connection to the beaglebone black.Neither connection in CCS nor putty can get a message from ssh connection.

does the ti sdk support ssh as default?or i have to do something to config the ssh server or client?