公开(公告)号：US07564802B2

公开(公告)日：2009-07-21

申请号：US11089801

申请日：2005-03-25

申请人： Bala Andrapalliyal ,  Frank Feather ,  Tejas Naik

发明人： Bala Andrapalliyal ,  Frank Feather ,  Tejas Naik

IPC分类号： H04L12/28 ,  H04L12/56

CPC分类号： H04L12/4679

摘要： A method for optimal assignment of customer edge (CE) routers to virtual private network route forwarding (VRF) tables uses a “peer model”, in which the CE routers communicate their routes to a Service Provider's edge routers (PE routers). The routes of a particular VPN are then exchanged among the PE routers that are attached to that VPN. This is accomplished in a manner which ensures that routes from different VPNs remain distinct and separate, even if two VPNs comprise an overlapping address space. The PE routers distribute, to the CE routers in a particular VPN, the routes from other CE routers in that VPN. The CE routers do not peer with each other and, as such, there is no “overlay” visible to a VPN's routing algorithm.

摘要翻译： 客户边缘（CE）路由器到虚拟专用网络路由转发（VRF）表的最佳分配方法使用“对等模型”，其中CE路由器将路由器通信到服务提供商的边缘路由器（PE路由器）。 然后在连接到该VPN的PE路由器之间交换特定VPN的路由。 这是以确保来自不同VPN的路由保持不同和分离的方式来实现的，即使两个VPN包括重叠的地址空间。 PE路由器向特定VPN中的CE路由器分发来自该VPN中其他CE路由器的路由。 CE路由器不相互对等，因此VPN的路由算法没有可见的“覆盖”。

公开(公告)号：US20060215578A1

公开(公告)日：2006-09-28

申请号：US11089801

申请日：2005-03-25

申请人： Bala Andrapalliyal ,  Frank Feather ,  Tejas Naik

发明人： Bala Andrapalliyal ,  Frank Feather ,  Tejas Naik

IPC分类号： H04L12/28

CPC分类号： H04L12/4679

摘要： A method for optimal assignment of customer edge (CE) routers to virtual private network route forwarding (VRF) tables uses a “peer model”, in which the CE routers communicate their routes to a Service Provider's edge routers (PE routers). The routes of a particular VPN are then exchanged among the PE routers that are attached to that VPN. This is accomplished in a manner which ensures that routes from different VPNs remain distinct and separate, even if two VPNs comprise an overlapping address space. The PE routers distribute, to the CE routers in a particular VPN, the routes from other CE routers in that VPN. The CE routers do not peer with each other and, as such, there is no “overlay” visible to a VPN's routing algorithm.

公开(公告)号：US07720976B2

公开(公告)日：2010-05-18

申请号：US12059105

申请日：2008-03-31

申请人： Thomas P. Chu ,  Frank Feather ,  Yung-Terng Wang

发明人： Thomas P. Chu ,  Frank Feather ,  Yung-Terng Wang

IPC分类号： G06F15/16 ,  H04J3/22

CPC分类号： H04L29/12216 ,  H04L29/12301 ,  H04L29/12915 ,  H04L29/12952 ,  H04L61/2007 ,  H04L61/2076 ,  H04L61/6059 ,  H04L61/6077 ,  H04L65/1006 ,  H04L65/105

摘要： In one embodiment, a method for processing, at an enhanced Session Initiation Protocol (SIP) proxy (e-proxy), (1) a SIP INVITE message to a first user at an IPv4/IPv6 dual-stack (DS) host, connected to an IPv6 network, from a second user at an IPv4 host, connected to an IPv4 network. The e-proxy receives the SIP INVITE message from the IPv4 network. When the e-proxy determines that Dual Stack Transition Mechanism (DSTM) service is required, the e-proxy obtains a temporary IPv4 address for the DS host, finds a suitable tunnel end-point (TEP), and sends a corresponding, but modified, INVITE message to the DS host. The modified INVITE message body includes invocation of DSTM service, the temporary IPv4 address, the TEP's IPv6 address, and the IPv4 host's IPv4 address. The e-proxy sends a BIND message to the TEP to bind the DS host's IPv6 address to the temporary IPv4 address for proper tunneling.

摘要翻译： 在一个实施例中，一种在增强的会话发起协议（SIP）代理（e-proxy）处理（1）在IPv4 / IPv6双栈（DS）主机处向第一用户发送SIP INVITE消息的方法， 来自IPv4主机的第二用户的IPv6网络连接到IPv4网络。 电子代理从IPv4网络接收SIP INVITE消息。 当电子代理确定需要双栈转换机制（DSTM）服务时，电子代理获取DS主机的临时IPv4地址，找到合适的隧道端点（TEP），并发送相应但已修改的 ，INVITE消息给DS主机。 修改的INVITE消息体包括调用DSTM服务，临时IPv4地址，TEP的IPv6地址和IPv4主机的IPv4地址。 电子代理向TEP发送BIND消息，将DS主机的IPv6地址绑定到临时IPv4地址，以进行正确的隧道。

公开(公告)号：US20090248800A1

公开(公告)日：2009-10-01

申请号：US12059105

申请日：2008-03-31

申请人： Thomas P. Chu ,  Frank Feather ,  Y.T. Wang

发明人： Thomas P. Chu ,  Frank Feather ,  Y.T. Wang

IPC分类号： G06F15/16

CPC分类号： H04L29/12216 ,  H04L29/12301 ,  H04L29/12915 ,  H04L29/12952 ,  H04L61/2007 ,  H04L61/2076 ,  H04L61/6059 ,  H04L61/6077 ,  H04L65/1006 ,  H04L65/105

摘要： In one embodiment, a method for processing, at an enhanced Session Initiation Protocol (SIP) proxy (e-proxy), (1) a SIP INVITE message to a first user at an IPv4/IPv6 dual-stack (DS) host, connected to an IPv6 network, from a second user at an IPv4 host, connected to an IPv4 network. The e-proxy receives the SIP INVITE message from the IPv4 network. When the e-proxy determines that Dual Stack Transition Mechanism (DSTM) service is required, the e-proxy obtains a temporary IPv4 address for the DS host, finds a suitable tunnel end-point (TEP), and sends a corresponding, but modified, INVITE message to the DS host. The modified INVITE message body includes invocation of DSTM service, the temporary IPv4 address, the TEP's IPv6 address, and the IPv4 host's IPv4 address. The e-proxy sends a BIND message to the TEP to bind the DS host's IPv6 address to the temporary IPv4 address for proper tunneling.

摘要翻译： 在一个实施例中，一种用于在增强的会话发起协议（SIP）代理（e-proxy）处理（1）到IPv4 / IPv6双栈（DS）主机处的第一用户的SIP INVITE消息的方法， 来自IPv4主机的第二用户的IPv6网络连接到IPv4网络。 电子代理从IPv4网络接收SIP INVITE消息。 当电子代理确定需要双栈转换机制（DSTM）服务时，电子代理获取DS主机的临时IPv4地址，找到合适的隧道端点（TEP），并发送相应但已修改的 ，INVITE消息给DS主机。 修改的INVITE消息体包括调用DSTM服务，临时IPv4地址，TEP的IPv6地址和IPv4主机的IPv4地址。 电子代理向TEP发送BIND消息，将DS主机的IPv6地址绑定到临时IPv4地址，以进行正确的隧道。