约 124,000 个结果
在新选项卡中打开链接
  1. GeeksForGeeks
    https://www.geeksforgeeks.org › generic-ro…

    Generic Routing Encapsulation (GRE) Tunnel

    2020年8月12日 · Generic Routing Encapsulation is a method of encapsulation of IP packet in a GRE header which hides the original IP packet. Also a new header named delivery header is added above GRE header which contains new …

    标记:
    Generic Routing Encapsulation
    GRE Tunnel

  2. GRE Packet Example的图片

    bing.com › images
    查看所有图像
  3. IPCisco
    https://ipcisco.com › lesson › gre-tunnel...

    GRE Tunnel Configuration with Cisco Packet Tracer

    In this confgiuration example, we will see how to configure Cisco GRE (Generic Routing Encapsulation) Tunnel with Packet Tracer. For our GRE Tunnel Configuration example, we will use the below topology and the given IP …

    标记:
    Generic Routing Encapsulation
    Ip Tunnel Gre
    GRE Tunnel Configuration
  4. Wikipedia
    https://en.wikipedia.org › wiki › Generic_Routing_Encapsulation

    Generic routing encapsulation - Wikipedia

  6. Cisco Community
    https://community.cisco.com › networking...

    How to configure a GRE tunnel - Cisco Community

    标记:
    Generic Routing Encapsulation
    GRE Tunnel
    Cisco Systems, Inc.
    How-to
  7. Packet Pushers
    https://packetpushers.net › blog › anatomy …

    Anatomy Of GRE Tunnels - Packet Pushers

    2020年1月21日 · For example, if IPv6 is to be tunneled across an IPv4 infrastructure, the device forwards the IPv6 packet to the GRE tunnel interface. The GRE tunnel interface adds its header and uses the IPv4 protocol stack to …

    标记:
    Generic Routing Encapsulation
    GRE Tunnel
  8. Study CCNP
    https://study-ccnp.com › generic-routing...

    Generic Routing Encapsulation (GRE) Tunnel - Study …

    Generic Routing Encapsulation or GRE protocol is developed by Cisco and it provides a virtual point-to-point private connection and encapsulates and forwards packets over an IP-based network. GRE is used in many instances, such as …

    标记:
    Generic Routing Encapsulation
    Ip Tunnel Gre
    Gre Tunnel Through Nat Device
  9. 其他用户还问了以下问题
    What is a GRE packet?
    It may be viewed as a separator between two different protocol stacks, one acting as a carrier for another. GRE packets that are encapsulated within IP directly, use IP protocol type 47 in the IPv4 header's Protocol field or the IPv6 header 's Next Header field.

    Generic routing encapsulation - Wikipedia

    en.wikipedia.org
    How a GRE packet reaches R2?
    GRE packet now travel through path in network defined by various routing protocols and reaches R2’s tunnel interface (tunnel 1). R2 upon receiving the GRE packet, decrypt the packet i.e, removes delivery and GRE header. R2 now forwards the IP packet according to original destination address to the server.

    Generic Routing Encapsulation (GRE) Tunnel - GeeksforGeeks

    geeksforgeeks.org
    What protocol type is GRE encapsulated in?
    GRE packets that are encapsulated within IP directly, use IP protocol type 47 in the IPv4 header's Protocol field or the IPv6 header 's Next Header field. For performance reasons, GRE can also be encapsulated in UDP packets.

    Generic routing encapsulation - Wikipedia

    en.wikipedia.org
    What does 0 mean in a GRE packet?
    The protocol type 0 indicates that it is a keepalive packet. This becomes the passenger protocol. R1 adds an outer IP header to the above GRE packet with the source set to the tunnel destination, 2.2.2.2/32, and the destination of the packet set to the local router’s tunnel source, 1.1.1.1/32.

    Anatomy Of GRE Tunnels - Packet Pushers

    packetpushers.net
    How does R1 encapsulate a GRE packet?
    R1 adds an outer IP header to the above GRE packet with the source set to the tunnel destination, 2.2.2.2/32, and the destination of the packet set to the local router’s tunnel source, 1.1.1.1/32. The above outer IP header is then encapsulated with another GRE header with the protocol type set to 0x0800 (IP). This becomes the carrier protocol.

    Anatomy Of GRE Tunnels - Packet Pushers

    packetpushers.net
    What happens if a GRE packet is not received?
    If this packet isn’t received within a specific time period, R1 brings down the tunnel interface. With the use of keepalives, the tunnel status is based on the actual reachability to the destination. The GRE keepalives should be enabled at both tunnel endpoints in order to avoid routing black holes.

    Anatomy Of GRE Tunnels - Packet Pushers

    packetpushers.net
    反馈
  10. Allied Telesis
    https://www.alliedtelesis.com › sites › default › files › ...
    [PDF]

    Generic Routing Encapsulation (GRE) - Allied Telesis

    标记:
    Generic Routing Encapsulation
    GRE
  11. H3C
    https://www.h3c.com › en

    Support - 16-GRE configuration- H3C

    · Delivery header —Header that is added to the GRE packet to deliver it to the tunnel end. The transport protocol (or delivery protocol) is the network layer protocol that transfers GRE packets. ... Example: Configuring an IPv4 over …

    标记:
    Generic Routing Encapsulation
    GRE Tunnel Configuration
  12. Cisco
    https://www.cisco.com › ...

    Understand GRE Tunnel Keepalives - Cisco

    标记:
    Generic Routing Encapsulation
    Ip Tunnel Gre
    Cisco Systems, Inc.
  13. ENCOR Training
    https://www.digitaltut.com › gre-tunnel-tutorial

    ENCOR Training » GRE Tunnel Tutorial - digitaltut.com

    标记:
    Generic Routing Encapsulation
    Ip Tunnel Gre