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routing on P2P connection

Unanswered Question
Jan 14th, 2014
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Hi All


I have P2P connection with serial interface


Router A IP address 172.16.1.65. 255.255.255.252

Router B IP address  172.16.1.66 255.255.255.252



when I check routing table wih sjh ip route on router A


its show Router B IP address as directlu connected


C       172.16.1.64/30 is directly connected, Serial0/3

C       172.16.1.66/32 is directly connected, Serial0/3   Router B IP address.



interface Serial0/3

bandwidth 2048

ip address 172.16.1.65 255.255.255.252

no ip redirects

no ip unreachables

no ip proxy-arp

encapsulation ppp

ip route-cache flow

end



and when I traceroue to 172.16.1.65 first hop is 172.16.1.66.



How to rectify



Please help.


Thanks

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cadet alain Tue, 01/14/2014 - 23:46
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  • Purple, 4500 points or more

Hi,

PPP advertises the IP address of the peer as a directly connected  /32  due to peer neighbour-route feature that enables peers to have IPs on different subnets.

So if you want to get rid of this /32 you must enter this in interface config:

no peer neighbour-route (on each side)

or change encapsulation to hdlc with the interface config command no encapsulation ppp

Concerning the communication with your own IP on a serial link( whether it is ppp or hdlc) ,what you observe is normal and can't be changed.When communicating with your IP the packet is sent on the link, goes to peer which sends it back to you.


Regards


Alain



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