first lab cant ping

tasman35

In my first lab I set the Ip and it wants me to ping the other routers.. It times out .I have 3 Routers and set up the ip and subnet mask but I cant ping the other routers it keeps timimg out ...THe only thing I can think of is icmp is not turned on...How can I trouble shoot this?

The IT Guy

There are many ways to troubleshoot this, but you have provided too few details about your topology. If this is your first lab and you are using serial point-to-point connections between routers, try issuing "show controllers" and ensure the DCE ends are configured with a clock rate and your serial interfaces are not shutdown. I only mention this because I remember having that issue back when I first started.

If you provide a little more detail about your setup, we can probably provide you with more precise troubleshooting suggestions.

WilyOne

Is this a real lab or something like Packet Tracer?

This calls for the bottom-up approach to troubleshooting, so first we check layer 1. How are you connecting the routers, using serial interfaces or just Fast Ether ports? What kind of cables are used to connect the routers?

Do 'show ip int bri' and tell us if the interfaces up/up.

d6bmg

Give us more description about the 'lab' you are working on.

tasman35

Sorry It has taken me so long to get back to my own Post BUt got callin to work over the weekend...

Ok this is what I have I have a ccna testlab that I orderd online....3 Routers 2600 and 3 switches 2950

One of my routers hasI will call R1 has 2 WIC CUS/DSU T1 cards on the back..

SETUP: out of the R1 the first CSUDSU T1WIC card goes to R2(router2) CSU/DSU WIC card
Out of THe R1 sec. CSU/DSU T1 WIC card goes to R3(router3) CSU/DSU WIC card

Thats the Hardwere setup Now for the commad cor the confiuration of the routers.
Router 1

enable
conf t
Hostname R1
enab pass cisco
line vty 0 4
pass cisco
login
int s0 (this did not work i had to use s0/0 )
ip add 192.168.1.1 255.255.255.0
clock rate 64000 (WIC-1T&2500 LABSONLY) I tried Both
Service-module T1 clock source T1 clock cource internal (WIC-1DSU-T1 LABS ONLY) This is the one I thoght would work...?
no shut
int s1( not work had to use s0/1)
ip add 193.1.1.1 255.255.255.0
clock rate 64000 WIC-1T&2500 LABSONLY) SAme
Service-module T1 clock source T1 clock cource internal (WIC-1DSU-T1 LABS ONLY) This is the one I thoght would work...
no shut
end
write


ROUTER 2
ENABLE
CONF T
host R3
ena pass cisco
line vty 0 4
password cisco
login
int s0 (S0/0)
IP ADD 192.168.1.2 255.255.255.0
clock rate 64000 (WIC-1T&2500 LABSONLY) I tried Both
Service-module T1 clock source T1 clock cource internal (WIC-1DSU-T1 LABS ONLY) This is the one I thoght would work...
no shut
ip route 193.1.1.1 255.255.255.0 192.168.1.1
end
write


Router 3

ENABLE
CONF T
host R3
ena pass cisco
line vty 0 4
password cisco
login
int s0 (S0/0)
IP ADD 193.1.1.3 255.255.255.0
clock rate 64000 (WIC-1T&2500 LABSONLY) I tried Both
Service-module T1 clock source T1 clock cource internal (WIC-1DSU-T1 LABS ONLY) This is the one I thoght would work...
no shut
ip route 192.168.1.0 255.255.255.0 193.1.1.1
end
write

Testing Router 1

PIng 192.168.1.1

success rate is o (0/5)


It goes on from here withe the same thing....

One thing I did not say was Im useing cross over cables from router to router and straight thoght cables....


Not sure if Im doing somthing wrong or if its that routers or the csu/dsu card or what ever ...Just wanted to see where to start trouble shooting this ...

NetworkVeteran

THe only thing I can think of is icmp is not turned on...How can I trouble shoot this?

As for a general method, verify L1, then L2, then L3. Work your way up the layers to isolate the problem.

1. What does "show interface" tell you about the status of the interfaces?
2. What does "show cdp neighbors" tell you?
3. Finally, what does "ping" tell you?
   • Verify connectivity between two neighboring devices.
   • Verify connectivity end-to-end.

DCD

Do you have a T1 crossover cable? Like WilyOne said do a {show ip int bri } and post that info.

tasman35

show interface

R1>show interface
R1>show interface
FastEthernet0/0 is administratively down, line protocol is down#############################################
Hardware is AmdFE, address is 0001.9654.5040 (bia 0001.9654.5040)n

Translating "ping193.1.1.3"...domain server (255.255.255.2
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
######################
reliability 255/255, txload 1/255, rxload 1/255art undergoing a cold start under
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)is enabled
Auto-duplex, Auto Speed, 100BaseTX/FX
ID ME
ARP type: ARPA, ARP Timeout 04:00:00

Last input never, output never, output h
Queueing strategy: fifo
Output queue: 0/40 (size/max)
TOTAL:
5 minute input rate 0 bits/sec, 0 packets/secthe above Memory


5 minute output rate 0 bits/sec, 0 packets/sec

Use, duplication, or d
0 packets input, 0 bytesType escape sequence to abort
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignoredgraph
0 watchdogeg-if
0 input packets with dribble condition detectedSoftware - Restrictedools
0 packets output, 0

r3(conf

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,r board System flash (Read/Write)n
reliability 255/255, txload 1/255, rxload 1/255##



Press RETURN to get started! ^####
Encapsulation HDLC, loopback not set


Keepalive set (10 sec)INEPROTO-5-UPDOWN: Line
Last input never, output never,

0 output buffer failures, 0 output buffers swapped outd state to down
*Mar 1 00:00:19.091:
0 carrier transitionsprotocol on Interface Seri
DCD=down DSR=up DTR=up RTS=up CTS=down
changed

FastEthernet0/1 is administratively down, line protocol is down-CONFIG_I: Configured from memory by console
Hardware is AmdFE, address is 0001.9654.5041 (bia 0001.9654.5041)20.871: %LINK-5-CHANGED: Interface FastEthernet0/0, changed state
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
to administrative
reliability 255/255, txload 1/255, rxload 1/255 %LINK-5-CHANGED: Interface FastEthernet0/1, changed
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)ely down
Auto-duplex, Auto Speed, 100
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Technical Support: http://www.cisco.com/techsupport
Queueing strategy: fifo
Copyrigh
Output queue: 0/40 (size/max), Inc.
5 minute input rate 0 bits/sec, 0 packets/sec15 by dchih
5 minute output rate 0 bits/sec, 0 packets/secgent on host r1 is undergoing a c
0 packets input, 0 bytes
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles#configure memory

r1#
*Mar 1 00:48
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
service timestamps debug datet
0 output errors, 0 collisions, 0 interface resetstimestamps log datetime msec
0 babbles, 0 late collision, 0 deferred
no service passwo
0 lost carrier, 0 no carrier
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/0/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=down DSR=up DTR=up RTS=up CTS=down

SHow cdp neighbors

R1> show cdp neighbors
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater

Device ID Local Intrfce Holdtme Capability Platform Port ID
R1>

NetworkVeteran

Output wrote:

FastEthernet0/0 is administratively down, line protocol is down
FastEthernet0/1 is administratively down, line protocol is down

1) You said your problem was with Serial interfaces, and these are FastEthernet interfaces.
2) Can you see the problem in the output above? Would you expect ping to succeed on this interface?

Try going through the full process I mentioned above. Analyze the output to the best of your ability. Then tell us what layer you believe the problem is at and what you think might be causing a problem at that layer.

The word "Administratively" above is a hint!

NetworkVeteran wrote:

As for a general method, verify L1, then L2, then L3. Work your way up the layers to isolate the problem.

1. What does "show interface" tell you about the status of the interfaces?
2. What does "show cdp neighbors" tell you?
3. Finally, what does "ping" tell you?
   • Verify connectivity between two neighboring devices.
   • Verify connectivity end-to-end.