![]() ![]() (multiple) of predefined IPv4 or IPv6 headers (device IP addresses). The Network Management System (NMS) sends IP-in-IP (IPv4 or IPv6) packets with a stack In some networks, IP-in-IP decapsulation is used for network management to verify ECMP availability and to measure the latency Now, you can choose the IP ECMP links when there are multiple IP links between the two switches for decapsulation. IPv6 address that is locally configured and operationally Up in the switch. With this new tunnel source direct option, a single tunnel interface can decapsulate multiple tunnel packets whose outer destination IP is any of the IPv4 or Feature History Tableĭecapsulating Multiple Tunneled Packets Using Tunnel Source Direct Decapsulating Multiple Tunneled Packets Using Tunnel Source Direct Table 1. This completes the configuration of IP-in-IP decapsulation. RP/0/ RP0 /CPU0:router# show running-config interface tunnel-ip 10 Indicates the destination address for the IP-in-IP decap tunnel w.r.t the Indicates the source address for the IP-in-IP decap tunnel w.r.t the router Tunnel mode ipv4 decap: enables IP-in-IP decapsulation. RP/0/ RP0 /CPU0:router(config)# interface tunnel-ip 10 RP/0/ RP0 /CPU0:router(config-if)# tunnel mode ipv4 decap RP/0/ RP0 /CPU0:router(config-if)# tunnel source loopback 0 RP/0/ RP0 /CPU0:router(config-if)# tunnel destination 10.10.1.2/32Īddress: enables ipv4 packet processing without an explicit address, except The encapsulated packet has an outer IPv4 header that is stacked over the original IPv4 header, as shown in the followingįollowing sample configuration on the routers to decapsulate the packet as it Stacked IP Header in an Encapsulated Packet Traverse through the de-capsulating routers. Illustration shows how the stacked IPv4 headers are de-capsulated as they IP-in-IP Decapsulation Through a Data Center Network The IP-in-IP tunnel consists of multiple routers that are used to decapsulate andĭirect the packet through the data center fabric network.įigure 2. Of the network from source to destination. The following topology describes a use case where IP-in-IP encapsulation and decapsulation are used for different segments Basic Encapsulation and Decapsulation with an IP-in-IP Tunnel Use Case: Configure IP-in-IP Decapsulation Illustration describes the basic IP-in-IP encapsulation and decapsulationįigure 1. It is to be noted that the entire path from source to the destination does not have to be included in the headers,īut a segment of the network can be chosen for directing the packets. This tunneling mechanism can be used for determining availability and latency for most networkĪrchitectures. Packet over a predetermined path to the destination, provided the network administrator knows the loopback addresses of the The stack of IP headers is used to direct the The source and destinationĪddress in the outer IP header point to the endpoints of the IP-in-IP tunnel. IP-in-IP encapsulation involves the insertion of an outer IP header over the existing IP header. The source server is also known as the encapsulation server. Server wants to influence the route that a packet takes to reach theĭestination host. Decapsulating Multiple Tunneled Packets Using Tunnel Source Directĭatagrams in a network is done for multiple reasons, such as when a source. ![]() Tunneling provides a mechanism to transport packets of one protocol within another protocol. ![]()
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