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Synchronisation Rule

Conditions

1. all routers are using BGP
2. synchronization is OFF in AS 647000

Synchronisation 1.JPG


Regarding the route to 198.12.1.0; which routers will this route propagate to?
A. Router TK6
B. Routers TK2 and TK6
C. Routers TK2, TK4, and TK6
D. Routers TK2, TK3, TK4, and TK6
E. Routers TK1, TK2, TK3, TK4, and TK6
F. Routers TK1, TK2, TK3, TK4, TK5, and TK6
G. It will not be propagated to any other router

1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Silver

Re: Synchronisation Rule

Hello Sohail,

the question is different:

>> Regarding the route to 198.12.1.0; which routers will this route propagate to?

the route is originated by TK6 and sent to TK2, TK2 propagates it to all its iBGP neighbors, TK1 propagates it to its eBGP neighbor TK5 because sync is OFF.

so the answer should be F in this case

if sync where on on TK1 it would not propagate the route to TK5 waiting to see the same route in the IGP

Hope to help

Giuseppe

2 REPLIES
Hall of Fame Super Silver

Re: Synchronisation Rule

Hello Sohail,

the question is different:

>> Regarding the route to 198.12.1.0; which routers will this route propagate to?

the route is originated by TK6 and sent to TK2, TK2 propagates it to all its iBGP neighbors, TK1 propagates it to its eBGP neighbor TK5 because sync is OFF.

so the answer should be F in this case

if sync where on on TK1 it would not propagate the route to TK5 waiting to see the same route in the IGP

Hope to help

Giuseppe

Re: Synchronisation Rule

None of the answers is correct,

It will be propagated to TK2 and TK3,

HTH

Mohamed

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