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Hi ,<br />
<br />
I believe &nbsp;the fa0 in the o/p should be the interface ip of the ethernet of the router ;but it is not;<br />
The show ip cache flow fa0 o/p and the ip address configured on ethernet address of router are different<br />
<br />
Iam confused with your exp;please help
</div>


Hi ,

I believe  the fa0 in the o/p should be the interface ip of the ethernet of the router ;but it is not;
The show ip cache flow fa0 o/p and the ip address configured on ethernet address of router are different

Iam confused with your exp;please help

<div>
<div class="content wysiwyg-content">
Hi,<br />
<br />
rt01# sh ip cache flow &nbsp;| i y.y.y.y<br />
<br />
<br />
Fa0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; x.x.x.x &nbsp;Se0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; y.y.y.y &nbsp;E00 01BB &nbsp;2893<br />
<br />
Fa0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;x.x.x.x &nbsp;Se0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; y.y.y.y &nbsp;06 5FA3 01BB &nbsp; &nbsp;23<br />
<br />
The source interface, the ethernet &nbsp;address is not x.x.x.x &nbsp;in this internet facing router.<br />
It is other &nbsp;public z.z.z..z &nbsp;ip &nbsp;.I thought Fa0 source interface output in show ip cache flow should be this public ip z.z.z.z assigned to fa0.But that is not the case.<br />
<br />
Please explain how the ip address of FA0 determined<br />
<br />
<br />
kindly explain.<br />

</div>
</div>


Hi,

rt01# sh ip cache flow  | i y.y.y.y


Fa0           x.x.x.x  Se0           y.y.y.y  E00 01BB  2893

Fa0          x.x.x.x  Se0           y.y.y.y  06 5FA3 01BB    23

The source interface, the ethernet  address is not x.x.x.x  in this internet facing router.
It is other  public z.z.z..z  ip  .I thought Fa0 source interface output in show ip cache flow should be this public ip z.z.z.z assigned to fa0.But that is not the case.

Please explain how the ip address of FA0 determined


kindly explain.


sh ip cache flow

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.