There is a small correction, we used 172.16.0.0/12 networks on the serial
interfaces, i think you figured that out anyways. The other is not in
RFC1918 :).
I don't understand this comment:
>If you're at R1, you're unable to ping R2's Ethernet interface because
>network 10 is directly connected.
Then why would pinging the serial interfaces on each router (R2+) work even
though 172.16.0.0 is directly connected via s0/0 and s0/1?.
I am just not understanding why the 10 network would not work, yet the
172.16 network would. Why would I not get updates from 10.0.2.1 and the
others? I have three interfaces directly connected on each router (except
for the first and last see below). I should be getting updates from both
networks, shouldn't I?
|----| S0/0 172.16.1.1 |----| S0/0 172.16.2.1 |----|
| R1 |--------------------| R2 |---------------------| R3 |--etc...
|----| 172.16.1.2 S0/1 |----| 172.16.2.2 S0/1 |----|
| F0/0 10.0.1.1 | F0/0 10.0.2.1 | F0/0
10.0.3.1
| |
|
| |
|
10.0.1.2 10.0.2.2 10.0.3.2
I have tried this on RouterSim and it worked fine.
""Leigh Anne Chisholm"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> That's kind of the problem Symon. The problem is that network 10 exists
on
> both sides of the serial connection.
>
>
> 10.0.1.1 172.16.1.1 172.16.1.2 10.0.2.1
> E0 S0 S0 E0
> R1 R2
> ---------- ------------------- ----------
> Network 10 Network 172 Network 10
> Ethernet Serial Ethernet
>
>
>
> What you have is a discontiguous network with Network 10. You can't have
> that with a classful routing protocol. That's basic CCNA-level network
> theory. If your instructor was unable to understand why you couldn't ping
> the interfaces properly, I'd have strong reservations about their overall
> ability to teach an advanced networking course.
>
> If you're at R1, you're unable to ping R2's Ethernet interface because
> network 10 is directly connected. It sends the ping out the E0 interface
> rather than routing it across the serial connection to R2. If you're at
R2,
> you're unable to ping R1's Ethernet interface because network 10 is
directly
> connected. It sends the ping out the E0 interface rather than routing it
> across the serial connection to R2.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=18854&t=18786
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