Help with VLAN on packet tracer

[card51short]

Guys I have an assignment in one of my routing/switching classes and I just cant' figure it out. I've literally redone this 4 times and I can't figure it out.  I'm following all the instructions I can find to a T.  What am I doing wrong ?

I can ping PC2 and PC3 from the router and from each other but I can't ping PC1.  I have no idea why.  Is the default gateway for the switches wrong?  I don't get it.

I have attached a file with the assignment.   Please someone give me an idea of why I can't ping PC1.  (in this version, I haven't done the serial links yet - I know how to get that working - what I cant' figure out is pinging PC1!)

I'm sure you'll want some information from my routers and switches - just let me know what exactly you need!  Thanks

Thanks!!!

[card51short]

When I do 'encapsulation ppp' on the serial line - the eigrp goes down.  What should I do to enable PPP?

[dpedavoli3]

The router interfaces should have the following configuration;

R1 - Serial0/0/0 + ISP Router - Serial 0/0/0 (ie. on both sides of this
link)

#encapsulation ppp
#ppp authentication chap

Additionally, to allot the authentication to work, you need to add a
username entry for each router.

On R1 #username ISP password cisco
On ISP #username R1 password cisco

Let me know if that works.

[card51short]

OK yes that works. 

One thing though - now PC4 can't ping PC2 or PC3.  Do I need to add the networks to R1 and R3's eigrp again?

[dpedavoli3]

You will only need to add the network commands on R1, as R1 is the one that
is directly connected to them.

#network 172.16.9.1 0.0.0.127
#network 172.16.8.1 0.0.0.255

[card51short]

why 0.0.0.127 for the first one?

And why not on R3?  If PC4 pings PC3 - won't R3 need to know the route?

[dpedavoli3]

The Wildcard does not matter too much in this scenario, it's just designed
the catch the IP on the interface to enable and advertise the network,
0.0.0.255 will suffice.

You don't need it on R3 because it learns it from the EIGRP process, it
learns about the network when R1 advertises it to everyone including ISP
and R3.

Specifically, as long as all your routers are EIGRP neighbors, you only
ever need to advertise the network on the router that directly connects to
it and EIGRP will do the rest to make sure all routers know how to get
there.

[card51short]

OK so why did I need to do the other one on R1 and R3? 

can you try to explain the 0.0.0.127 quickly. I understand wild card masks just not so good at figuring them out yet.

[dpedavoli3]

Because you needed to advertise the Server Network on R3 :)

[card51short]

OK I got it.  I advertised the networks for PC2 and PC3 in R1 and R3.  I'm not the best at wildcard masking so I used 0.0.0.255 and 0.0.255.255 and it works for both (since I don't need to specifically deny any other IPs)

Thanks for your help!

[gindrexrobles]

what would i do because i can't ping the localhost pc into the vlangroup

how i can access to all vlan group  using the localhost pc

thanks