Method and device for inquiring physical address

A physical address and address table technology, applied in the field of communication, can solve the problems of ARP broadcast occupying tunnel resources and performance degradation, and achieve the effects of reducing impact, saving bandwidth, and reducing tunnel resources

Inactive Publication Date: 2013-08-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the client (client) initiates an ARP broadcast request, it needs to copy the ARP request to all PWs through the AC, w

Method used

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  • Method and device for inquiring physical address
  • Method and device for inquiring physical address
  • Method and device for inquiring physical address

Examples

Experimental program
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Embodiment Construction

[0036] In the L2VPN (Layer 2 Virtual Private Network) device, VPN is used to realize the mapping between multiple AC interfaces and multiple PWs to form a data Layer 2 forwarding flow domain. In order to reduce the duplication of uplink ARP broadcast messages on the AC port to the PW, this embodiment starts broadcast message monitoring such as DHCP Snooping (Dynamic Host Configuration Protocol snooping) and ARP Snooping (Address Resolution Protocol snooping) within the VPN flow domain. Function, establish DHCP Snooping entry and ARP Snooping entry, for the uplink ARP broadcast message of the AC port, first search the local DHCP Snooping entry and ARP Snooping entry, if the corresponding record is found, it will directly reply instead of Duplicate broadcast packets to the PW to avoid occupying tunnel resources by ARP broadcast packets.

[0037] Such as figure 1 As shown, the method for querying the physical address in this embodiment includes:

[0038]Step 101: PE starts the ...

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PUM

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Abstract

The invention discloses a device and a method for inquiring a physical address. The method comprises the following steps: starting address analyses protocol snooping (ARPSnooping) and dynamic host configuration protocol snooping (DHCPSnooping) by a provider edge device to respectively snoop ARP message and DHCP message, so as to obtain a source IP address, a source MAC address and input port information from the messages, and then correspondingly saving in a built ARPSnooping table or DHCPSooping table; and inquiring a destination IP address of an ARP request broadcasting passage from the ARPSnooping table or the DHCPSnooping table when the snooped ARP message is the ARP request broadcasting passage by the PE, and when the destination IP address is obtained through inquiry, feeding the MAC address corresponding to the destination IP address back to a sender of the ARP request broadcasting message.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and device for querying a physical address. Background technique [0002] Transport Multiprotocol Label Switching (T-MPLS) is an MPLS-based, connection-oriented packet transport technology. T-MPLS cancels the functional characteristics related to L3 and IP routing in MPLS, and its equipment implementation will meet the needs of operators for low-cost and large-capacity next-generation packet networks. T-MPLS follows the existing idea based on the circuit-switched transport network, and adopts the same system architecture, management and operation mode. T-MPLS can support various packet services and circuit services. [0003] ARP (Address Resolution Protocol, Address Resolution Protocol) is a protocol for resolving an IP address into an Ethernet MAC address (media access control address or physical address). In the local area network, IP datagrams must be encapsu...

Claims

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Application Information

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IPC IPC(8): H04L29/12H04L12/741H04L45/74
Inventor 李士雷
Owner ZTE CORP
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