Site_l和Site_2之间的连接如图所示,根据图中配置分析，从Site_2发送数据包至Site_l时，经过R2封装后报又Payload IP Header中Source IP地址是 。（请填写点分十进制IP地址，不要填写掩码。如192.168.0.1 ）
<R1 >display current-configuration interface tunnel 0/0/0
#
Interface Tunnel0/0/0
Ip address 10.0.0.1 255.255.255.0 tunnel-protocol gre
Source 12.12.12.1
Destination 34.34.34.4
#
Return
<R1>
<R2>display current-configuration interface tunnel 0/0/0
#
Interface Tunnel0/0/0
Ip address 10.0.02 255.255.255.0 tunnel-protocol gre
Source 34.34.34.4
Destination 12.12.12.1
#
Return
<R2>
10.0.0.2
