Serial Link int problems 3

[krock22]

Hello

I have 2 2621XM routers connected via DCE serial cable but when Im done with the config and set the clockrate to 800000 I cannot ping the other router. I even set the clock rate on both routers to 800000 but nothing.

What am I douiong wrong

 

[ISPKing]

Well, 8mbps might be to high. Try something low like 64k (clock rate 64000) Second the clock rate command is only issued on the DCE, as it provides clocking for the DTE.

CCNP

 

[imbadatthis]

are they both up when you do sh ip int bri ?
are they on the same subnet?
have you done anything else on them except setting up IP address, clock rate, and no shut command ?
is the cable correctly installed?
some cables have DCE / DTE on them, you'll need to make sure you are connecting it correctly...

post config ?

 

[krock22]

Thanks ISP KING I changed the clock rate to 64000

imbadcatthis also thanks to you the subnet was not the same

R1 Se0/0 192.168.2.1/24
R2 Se0/0 192.168.3.2/24

now when I chaged R2 to be 192.168.2.2/24 it started to work

Thanks both of you now I can continue to brake stuff lol

 

[ISPKing]

np.

CCNP

 

[burtsbees]

You can make the clock to anything you want. I always make mine 4000000 for grins (some routers, 1536000 does not exist).

With a clock rate of 64000, your throughput will be limited to 64K, FYI.

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[ISPKing]

Some images do not support above e1 tho burts, sometimes it's limited to 2mbit.

CCNP

 

[imbadatthis]

oh wow my first star...
this thread needs to get framed and be put on my desk...

 

[burtsbees]

lol

That's how I felt when I was Tipmaster of the Week the first time...

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[krock22]

ok now I got another problem

PC1 (192.168.1.11) is connected to SW1 which is connected to R1's fa0/0
PC1>SW1>R1> (fa0/0 192.168.1.1/24)

R1 (se0/0 192.168.3.1) is connected via DCE Serial to R2 (se0/1 192.168.3.2) with a clock rate of 64000

R1 can ping R2's serial interface 0/1
PC1 can ping R1's FastEthernet interface 0/0
but PC1 cannot ping R2's Serial Interface

Why not? Litle confused :-\

Thanks

 

[imbadatthis]

posting config really really really helps us not guess what could be the issue.


do you have a routing protocol / static route running ?

R1 can ping R2's serial interface 0/1 <-- yes it knows that they are connected to each other.

PC1 can ping R1's FastEthernet interface 0/0 <--- yes PC knows its gateway / same subnet [/b]
but PC1 cannot ping R2's Serial Interface <----see below

doesn't know where things are.

regarding your PC : if you are manually assigning IP, i hope you are putting the gateway in there as the R1 interface on the same subnet [192.168.1.1]

on both routers:

option 1:

R1# conf t
!send all packets for the 192.168.3.0/24 network to se0
ip route 192.168.3.0 0.0.0.255 se0

R2# conf t
!send all packets for the 192.168.1.0/24 to se0
ip route 192.168.1.0 0.0.0.255 se0

option 2:

R1# conf t
router eigrp 1
no auto-summary
network 192.168.1.0 0.0.0.255
network 192.168.3.0 0.0.0.255

R2# conf t
router eigrp 1
network 192.168.3.0 0.0.0.255


both options are letting each router know how to get to the other side.

hope this helps...

posting config really really really helps us not guess what could be the issue.

 

[krock22]

Sorry New to this board didnt want to flood: Here is the config


Building configuration...

ROUTER 1

!
no ip domain-lookup
ip name-server 0.0.0.0
!
!
!
!
!
!
interface FastEthernet0/0
description Connection to PC0
ip address 192.168.1.1 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Serial0/0
description Serial Link to R2
ip address 192.168.3.1 255.255.255.0
clock rate 64000
!
interface Serial0/1
no ip address
shutdown
!
interface FastEthernet1/0
no ip address
duplex auto
speed auto
shutdown
!
interface FastEthernet1/1
no ip address
duplex auto
speed auto
shutdown
!
router eigrp 1
network 192.168.1.0
network 192.168.3.0
no auto-summary
!
ip classless
!
!
!
!
!
!
!
!
!
line con 0
exec-timeout 5 30
login


ROUTER 2

!
!
!
!
!
!
!
!
no ip domain-lookup
ip name-server 0.0.0.0
!
!
!
!
!
!
interface FastEthernet0/0
description Connection to PC1
ip address 192.168.2.20 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Serial0/0
no ip address
shutdown
!
interface Serial0/1
description Serial Link to R1
ip address 192.168.3.2 255.255.255.0
!
interface FastEthernet1/0
no ip address
duplex auto
speed auto
shutdown
!
interface FastEthernet1/1
no ip address
duplex auto
speed auto
shutdown
!
router eigrp 1
network 192.168.3.0
auto-summary
!
ip classless
!
!
!
!
!
!
!
!
!
line con 0
exec-timeout 5 30
password onmlk123
login


PC IP: 192.168.1.11
PC Mask: 255.255.255.0
PC: Gateway: 192.168.1.254

How does this look??

But still PC1 cannot ping R2

 

[imbadatthis]

ok pc1 gateway should be 192.168.1.1 the router interface its connected to .

under router 2 you have :

interface FastEthernet0/0
description Connection to PC1
ip address 192.168.2.20 255.255.255.0
duplex auto
speed auto

do you have two connections from PC1 ? one to R1 and one to R2 ?
what interface are you pinging ? the 192.168.3.2?
whats the message you are getting for your pings?

 

[krock22]

I just added another PC to router 2 so I have now

PC 1 > SW1 > R1 ----- serial ----- R2> SW2> PC2

I just changed the default gateway from the pc1 to 192.168.1.1

Now that I chaged that I can ping from PC 1 192.168.3.2 sucesfully

Now from PC2 I changed it's default gateway from 192.168.2.254 to 192.168.2.1 but I cannot ping R1's Serial interface 192.168.3.1 I get


C:\>ping 192.168.3.1

Pinging 192.168.3.1 with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 192.168.3.1:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

 

[krock22]

R1# conf t
router eigrp 1
no auto-summary
network 192.168.1.0 0.0.0.255
network 192.168.3.0 0.0.0.255

R2# conf t
router eigrp 1
no auto-summary
network 192.168.3.0 0.0.0.255
network 192.168.2.0 0.0.0.255 <<<<< is this extra line on R2 correct?

 

[burtsbees]

1)EIGRP statement needed for second subnet in R2

2)S0/0 in R1 is the same IP as your pc...

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[krock22]

how is R1's serial Ip the same as PC1?

 

[imbadatthis]

hehe i dont think anyone has explained the idea of the gateway to you

your PC2's gateway has to be the same Ip address as your router's interface that its connected to .
so in your case:

interface FastEthernet0/0
description Connection to PC1
ip address 192.168.2.20 255.255.255.0 <--------------
duplex auto
speed auto
!

basically your PC if it doesn't know what to do needs to 'ask' someone else... and that someone else is the interface of the router its connected to .

 

[krock22]

OK I appriciate you explaining the gateway process to me. Now that makes more sence, now I know why all my previous labs never worked. so now that I have set all that up I can ping all devices on the network from PC0 to PC1 to R1 and R2

Thanks Again

 

[burtsbees]

Whooops...

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!