Unnumbered Serial Link

[subodh121]

Hello All,

I was going through a Cisco Document related to using IP Unnumbered in serial link, there was whole configuration of IP Unnumbered on Routers with Serial connectivity & ospf was the protocol used. Could you please explain the basic Ideology behind using IP Unnumbered command in Serial interface to use ethernet interface IP address. Below is the connectivity diagram.

[paolo bevilacqua]

Anytime is necessary to use a  source address on that link, pick the one used by the associated interface.

And, directly connected route is not installed.

[Ganesh Hariharan · Accepted solution]

Hello All,
I
was going through a Cisco Document related to using IP Unnumbered in
serial link, there was whole configuration of IP Unnumbered on Routers
with Serial connectivity & ospf was the protocol used. Could you
please explain the basic Ideology behind using IP Unnumbered command in
Serial interface to use ethernet interface IP address. Below is the
connectivity diagram.

Hi,

The ip unnumbered   interface mode command borrows the IP address from the specified interface to the interface on which the command has been configured.

Check out the below link for further information :-

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094e8d.shtml

Hope to help !!

Ganesh.H

[subodh121]

Thanks a lot, yes there wont be route of directly connected interface configured with IP unnumbered command.