Patent ID: 8880703

Claim:
A Broadband Remote Access Server (BRAS) address distribution method comprising: two BRASs are mutually backup devices for each other and mutually backup each other, each of the said two BRASs occupy part of address resources in a shared address pool; wherein addresses occupied by one BRAS are different from addresses occupied by other BRAS; when detecting a user online, a BRAS selecting an address from a corresponding part of address resources in the shared address pool and distributing the address to the user; and the BRAS sending a notification message to a backup device of the BRAS, and informing the backup device of the address occupied by the user; wherein the method further comprises: formulating address distribution rules for the two BRASs to define the address resources distributed to each BRAS in following ways: sequencing addresses in the shared address pool; and defining one BRAS of said two BRASs to distribute the addresses in the shared address pool for online users on said BRAS in a mode of forward sequence distribution from lower address to higher address in the shared address pool, and the other BRAS of said two BRASs to distribute the addresses in the shared address pool for online users on said other BRAS in a mode of reverse sequence distribution from higher address to lower address in the shared address pool, wherein the distributed addresses in the mode of forward sequence distribution do not overlap with the distributed addresses in the mode of reverse sequence distribution.