[cisco-bba] duplicate IP address from pool (PPPoA aggregation - c7200)

Vusi Ndebele vusi at mandebele.com
Sun Dec 5 16:56:45 EST 2004

Im seeing some rather strange behaviour on a cisco 7200 doing PPPoA
aggregation for DSL customers. I am seeing customers being assigned
duplicate IP addresses from the pool. As a result, both routes exist in the
routing table and of course each customer experiences 50% packet loss. The
ip address is definitely not coming from RADIUS. The address range in
question is not defined within RADIUS, radius attribute for password is sent
as to assign from router's pool. I would appreciate input,
relevant parts of config below.



aaa new-model
aaa authentication ppp default group radius
aaa authorization network default group radius
aaa accounting network default start-stop group radius

interface ATM3/0.54 multipoint
 description Site 1 Traffic 1
 range pvc 54/50 54/300
  encapsulation aal5mux ppp Virtual-Template2
  no protocol ip inarp
interface Virtual-Template2
 ip unnumbered GigabitEthernet1/0
 peer default ip address pool titest1
 ppp authentication pap chap

ip local pool titest1

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