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Method for processing neighbor discovery protocol item and three-layer switching equipment

A Neighbor Discovery Protocol and three-layer switching technology, which is applied in data exchange networks, digital transmission systems, electrical components, etc., can solve the problem of inability to trigger unreachable detection at the protocol control level, achieve perfect unreachable detection, and ensure interoperability on the network side , Improve the effect of reliability and efficiency

Inactive Publication Date: 2013-10-16
ZTE CORP
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Problems solved by technology

It is difficult for us to guarantee that there is no problem with the network connected to PC2. If PC2 is no longer reachable on the network layer, and Switch maintains the state of direct sending, in this case, the unreachability detection at the protocol control layer cannot be triggered.

Method used

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  • Method for processing neighbor discovery protocol item and three-layer switching equipment
  • Method for processing neighbor discovery protocol item and three-layer switching equipment
  • Method for processing neighbor discovery protocol item and three-layer switching equipment

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Embodiment Construction

[0035] The technical solution of the present invention will be described in more detail below with reference to the drawings and embodiments.

[0036] like figure 2 As shown, the method for entry processing in this embodiment is applied to the layer-3 switching device of the neighbor discovery protocol, including: forwarding table status update module, forwarding table status timer, forwarding table status query module, neighbor cache table status update module, wherein:

[0037] The neighbor cache table status update module is used to maintain and update the status of the entries in the neighbor cache table. When the status of a neighbor cache table entry changes from Reachable to Stale, a forwarding table status timer is started and the forwarding table status is updated. The module resets the value of the forwarding identification bit of the forwarding table entry corresponding to the neighbor cache table entry; when the forwarding table state timer expires, it notifies th...

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Abstract

A method for processing neighbor discovery protocol table entry is disclosed. The method includes the following steps: after the state of the table entry of the neighbor buffer table of the protocol controlling layer is switched from reachable to stale, a layer-3 switching device detects whether there is a received-transmitted message in the data forwarding layer, which uses Internet Protocol (IP) address in the table entry of the forwarding table corresponding to the table entry of the neighbor buffer table. If so, the table entry of the neighbor buffer table is set as delay state. The method realizes the synchronization of the table state of the neighbor buffer table and the forwarding table, and improves the reliability and efficiency of data communication.

Description

technical field [0001] The invention relates to a table item processing method and a three-layer switching device, in particular to a neighbor discovery protocol table item processing method and a three-layer switching device. Background technique [0002] In the IPv6 protocol, the neighbor discovery protocol is given by RFC2461, including functions such as router and prefix discovery, address resolution and redirection, and new functions such as neighbor unreachable detection are added. [0003] The Neighbor Discovery Protocol indicates the reachability of neighbor nodes through different states of neighbor cache table entries. The neighbor cache table is shown in Table 1, including link address, table entry status and other information. When the switch (Switch) is ready to communicate with the host PC1, it will first check whether there is an entry corresponding to the IP address 1::2 of PC1 in the neighbor cache table, if not, it will perform link-layer address resolutio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/741H04L12/773H04L45/74
CPCH04L49/552H04L49/602
Inventor 刘晓东
Owner ZTE CORP
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