Chapter 8

1: With most BGP implementations, what is the source address of the TCP packets sent to a peer? How can this cause a problem for eBGP sessions built between nonconnected interfaces?
A1: The source address of the TCP packets transmitted to a peer is normally the IP address of the interface used to reach the peer's address (the destination address of the packets). This can cause problems for a pair of eBGP peers communicating over nondirectly connected addresses because it can mean the expected source of the packets doesn't match the real source of the packets.
2: How many IP hops does BGP normally assume will be between two eBGP peers? How is this condition normally checked within BGP implementations?
A2: The BGP specification states that ...

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