The following table lists terms and definitions used in this tunnel configuration discussion.
Tunneling Configuration Terms and Definitions
| Term | Definition |
|---|---|
| Generic Routing Encapsulation (GRE) | A tunnel mode that supports all combinations of IP tunnel encapsulation. |
| Tunnel | The use of network layer tunneling protocols to connect disjoint networks within the same (trusted) enterprise campus network, resulting in the destination address of the tunnel functioning as a logical next hop. |
| Payload | The original packet data and header that gets encapsulated into the tunnel outer header. |
| Virtual Private Port L2 tunnel | Virtual Private Ports permit the user to extend a virtual wire through an arbitrary routed network using GRE with transparent bridging. Any packets arriving on the tunnel physical port are immediately encapsulated and routed to the other end of the tunnel where the packets are de-encapsulated and sent out the end-tunnel physical port. |
| Tunnel Destination Address | The destination IP address used by the outer encapsulating header as the packet transits the tunnel. |
| Tunnel Keepalive | A means of monitoring both whether the tunnel endpoint is up and whether the packet has been decapsulated at the tunnel endpoint. |
| Tunnel Keyword | A GRE tunnel mode supported numeric password scheme. |
| Tunnel Mode | Specifies the encapsulation type(s) supported by the tunnel as GRE (any IP type combination), VXLAN L2, or a specific original packet IP type header over the tunnel IP type header. |
| Tunnel Probe | A means of monitoring whether the tunnel endpoint of any tunnel mode type is up. |
| Tunnel Source Address | The source IP address used by the outer encapsulating header as the packet transits the tunnel. |
| VXLAN | The Virtual eXtensible Local Area Network (VXLAN) feature implements a logical layer 2 switching overlay on an existing layer 3 IP network. |
| VXLAN Gateway | The VXLAN gateway is the tunnel endpoint on a switch. Also referred to as a VTEP. |
| VXLAN Network Identifier (VNI) | An up to 24-bit ID associated with each VXLAN segment. |
| VTEP | VXLAN tunnel endpoint. |
Print
this page
Email this topic
Feedback
View PDF
Download EPUB