Detection of routing loops based on time-to-live expiries

Details Detection of routing loops based on time-to-live expiries Detection of routing loops based on time-to-live expiries

2010-05-13

2011-10-25

Pham, Chi (Department: 2471)

Multiplex communications

Data flow congestion prevention or control

Control of data admission to the network

Reexamination Certificate

active

08045460

ABSTRACT:
A method and system for detecting routing loops and time-to-live (TTL) expiry attacks in a telecommunications network are disclosed. The detection of routing loops and TTL expiry attacks can be achieved based on the comparison of TTL expiries occurring on two or more routers in the network. A quantity of TTL expiries associated with a router can be summed. Additionally, a quantity of TTL expiries associated with other routers that are operatively coupled to the router can be summed. A difference between the sums can be calculated and a determination of whether a routing loop exists can be made in response to the difference.

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