Dynamic host configuration protocol (DHCP) message forwarding method for transparent interconnection of lots of links (TRILL) network and routing bridge

Abstract

The invention discloses a dynamic host configuration protocol (DHCP) message forwarding method for a transparent interconnection of lots of links (TRILL) network and a routing bridge. The method comprises the following steps that: the routing bridge (RB) setting a DHCP message trusted port transmits a used unique virtual multicast group address in the TRILL network to the other RBs in the TRILL network, and each RB performs virtual multicast group pruning for a multicast distribution tree; when receiving a request message, the RB setting the trusted port modifies a destination media access control (MAC) address of the message into a broadcast address and forwards the message; and when receiving the request message, the RB not setting the trusted port modifies the destination MAC address of the message into a virtual multicast group address and forwards the message along the multicast distribution tree. Based on the same inventive concept, the invention also discloses the RB. By the method and the RB, DHCP message forwarding privacy can be achieved, and chances of attacking the network can be reduced.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a dynamic host configuration protocol (DHCP) message forwarding method and a routing bridge in a translucent interconnection of multiple links (TRILL) network. Background technique [0002] DHCP is used to dynamically assign network configuration parameters such as IP addresses to network devices. DHCP adopts the client-server communication mode. The client submits a configuration request to the server, and the server returns the corresponding configuration information such as the IP address assigned to the client to realize the dynamic configuration of the IP address and other information. see figure 1 , figure 1 It is a schematic diagram of a typical application structure of DHCP. exist figure 1 , including a DHCP server 101 and multiple DHCP clients 102, such as PCs and laptops. [0003] see figure 2 , figure 2 It is a flow chart of a DHCP client dynamically obt...

AI Technical Summary

Problems solved by technology

[0013] The port connected to the DHCP server and other DHCP snooping devices needs to be set as a trusted port, and other ports are set as untrusted ports, so as to ensure that the DHCP client can only obtain an IP address from a legal DHCP server. assign IP address

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