This is waht I read about L2TP L2TP(Layer Two Tunneling Protocol,第二层通道协议)是VPDN(虚拟专用拨号网络 )技术的一种,专门用来进行第二层数据的通道传送,即将第二层数据单元,如点到点 协议(PPP)数据单元,封装在IP或UDP载荷内,以顺利通过包交换网络(如Internet) ,抵达目的地。 Here is my understanding, assuming I have a IP packet. (my IP packet) -> (Layer 2 header with tunnel destination layer 2 address sucah as MAC + ((my IP packet)) -> (IP header with tunnel destination IP address + (Layer 2 header with tunnel destination layer 2 address sucah as MAC + ((my IP packet)) ) -> (Layer 2 header with layer 2 address of next hop + (IP header with tunnel destination IP address + (Layer 2 header with tunnel destination layer 2 address sucah as MAC + ((my IP packet)) ) ) Am I right?
Here is something I want to share: Protocol stack: ip ppp L2TP udp IP layer2 L2TP encapsulation: IP header+udp header+L2TP header+PPP header+IP header+IP packet Datagram
PHD in FINANCE (not ECON) is still a hot commodity in US this year. Few (no) person will come back. Maybe next year or some years later more will be back.
【在 i**p 的大作中提到】 : This is waht I read about L2TP : L2TP(Layer Two Tunneling Protocol,第二层通道协议)是VPDN(虚拟专用拨号网络 : )技术的一种,专门用来进行第二层数据的通道传送,即将第二层数据单元,如点到点 : 协议(PPP)数据单元,封装在IP或UDP载荷内,以顺利通过包交换网络(如Internet) : ,抵达目的地。 : Here is my understanding, assuming I have a IP packet. : (my IP packet) -> : (Layer 2 header with tunnel destination layer 2 address sucah as MAC + ((my : IP packet)) -> : (IP header with tunnel destination IP address + (Layer 2 header with tunnel
【在 s***r 的大作中提到】 : PHD in FINANCE (not ECON) is still a hot commodity in US this year. Few (no) : person will come back. Maybe next year or some years later more will be : back.
After you understand L2TP encap, then try to figure out how the packets of L2TP over IPsec with NAT traversal look like.
my tunnel
【在 i**p 的大作中提到】 : This is waht I read about L2TP : L2TP(Layer Two Tunneling Protocol,第二层通道协议)是VPDN(虚拟专用拨号网络 : )技术的一种,专门用来进行第二层数据的通道传送,即将第二层数据单元,如点到点 : 协议(PPP)数据单元,封装在IP或UDP载荷内,以顺利通过包交换网络(如Internet) : ,抵达目的地。 : Here is my understanding, assuming I have a IP packet. : (my IP packet) -> : (Layer 2 header with tunnel destination layer 2 address sucah as MAC + ((my : IP packet)) -> : (IP header with tunnel destination IP address + (Layer 2 header with tunnel
s*1
29 楼
bless!!
s*g
30 楼
After you understand L2TP encap, then try to figure out how the packets of L2TP over IPsec with NAT traversal look like.
my tunnel
【在 i**p 的大作中提到】 : This is waht I read about L2TP : L2TP(Layer Two Tunneling Protocol,第二层通道协议)是VPDN(虚拟专用拨号网络 : )技术的一种,专门用来进行第二层数据的通道传送,即将第二层数据单元,如点到点 : 协议(PPP)数据单元,封装在IP或UDP载荷内,以顺利通过包交换网络(如Internet) : ,抵达目的地。 : Here is my understanding, assuming I have a IP packet. : (my IP packet) -> : (Layer 2 header with tunnel destination layer 2 address sucah as MAC + ((my : IP packet)) -> : (IP header with tunnel destination IP address + (Layer 2 header with tunnel
L2TP PW based VPN is not only used by SPs, enterprises use L2TP to establish L2VPN too, one application of this configuration is vMotion which requires two hosts are in the same VLAN.
【在 s*****g 的大作中提到】 : L2TP PW based VPN is not only used by SPs, enterprises use L2TP to establish : L2VPN too, one application of this configuration is vMotion which requires : two hosts are in the same VLAN.
A feature in vmware that two "live" VMs in the same VLAN have exact mirror of each other, so you can take down one live server for maintenance and the other VM will take over seamlessly. This is very useful when you need to take one ESX host in a cluster for off-line services.
【在 z**r 的大作中提到】 : what is vMotion? : : establish : requires