question to mr / keith bogart

Mohamed_atallah

HELLO MY SIR





iam still into ospf ,
section "OSPF Metric Calculation for Intra-Area & Inter-Area
Routes"





as you explain into this
example i have big problem:-





if abr-1 inject 1.1.1.0/24
from area 0 into area 1 and rtr-a received this network , into this case rtr-a
can also send same network 1.1.1.0/204 to abr-2 and abr-2 will inject this
network 1.1.1.0/24 into area 0 again and then we have loop into our network





so question , how abr-1 or
abr-2 into your example ( as you see into my picture uploaded) how abr prevent
loop happened into network?





thanks 
 

cristian.matei

The ABR receives but does not make use of type3 lsa received inbound on a non-backbone area. Thus loop is prevented.

Sent from my iPhone

On May 16, 2015, at 15:16, Mohamed_atallah <[email protected]> wrote:

HELLO MY SIR

iam still into ospf , section "OSPF Metric Calculation for Intra-Area & Inter-Area Routes"

as you explain into this example i have big problem:-

if abr-1 inject 1.1.1.0/24 from area 0 into area 1 and rtr-a received this network , into this case rtr-a can also send same network 1.1.1.0/204 to abr-2 and abr-2 will inject this network 1.1.1.0/24 into area 0 again and then we have loop into our network

so question , how abr-1 or abr-2 into your example ( as you see into my picture uploaded) how abr prevent loop happened into network?

thanks 

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