What is BGP Synchronization rules?? Can any one explain..???
Answer Posted / shahin
BGP synchronization rules states that
"Do not use or advertise to an external neighbors a route
learned by IBGP until a matching route has been learned from
IGP."
R1--------R2-------R3------R4
Here in this scenario R1 & R4 running IBP where R2 & R3
running sme IGP protocol.
As we know, for IBGP, neighbors don't need to have directly
conneted. Now when R1 tries to establish TCP session with
R4, it wud be successful to establish a session but when
updates message will come to R2 router which running IGP
(Such as OSPF/EIGRP/RIPv2) this R2 router aware of router
R4. No entry exist for path to reach R4.
As we know, router drops all the packet for unknown destination.
so all we hv to do is to sychonized the IBGP & IGP though
command. Once they synchronised with each other then only
any packet destined for R4 willbe able to pass though R2 & R3.
By default synchronization is on in all BGP running router.
Best practice to off it if all the router within the AS
running BGP.
Is This Answer Correct ? | 16 Yes | 2 No |
Post New Answer View All Answers
Tell us the name of best path in eigrp protocol?
What is the purpose of the Data Link?
Explain the draw back of ospf protocol?
Which protocol can do load balancing on unequal cost also?
How are internetworks created?
What are partial updates?
What is network?
Can you explain PPP protocol?
What is the attenuation?
What is the advantage of vlan?
Explain the difference between routing and routed protocols?
What is the difference between full duplex and half duplex?
How many collision domains are in switch?
Suppose a Switch interface went in error-dis mode what you will do for Troubleshooting List all Possibilities
Explain the types of resource sharing?