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Replies

Requset timed out while tracing the IP

hi,

I tried to view the tracing the Route for   my head office router to branch office router. after two hop its show the Request time out and the ping to the branch office router, what is the reason for Request timed out?

Kindly provide the solution.

7 Replies 7

Raju Sekharan
Cisco Employee
Cisco Employee

The 3rd hop has not responded with ttl expired

It can happen it that device is configured not to respond for ICMP TTL expiry

pls tell me hw to Enable ICMP in cisco router.

there are many ways to block the icmp router

Can you attach the show run from the device

Please Find below the  Running Config.

sh run

Building configuration...

Current configuration : 5942 bytes

!

! Last configuration change at 16:28:17 UTC Thu Sep 6 2012

! NVRAM config last updated at 15:35:27 UTC Fri Feb 3 2012

!

version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

service password-encryption

!

boot-start-marker

boot system flash c1841-advsecurityk9-mz.124-24.T4.bin

boot-end-marker

!

logging message-counter syslog

logging buffered 51200 notifications

enable secret 5 $1$p.Sv$CDtx3xdzb44Rslg8ACmc5.

enable password 7 121A0C041104

!

no aaa new-model

--More--                           dot11 syslog

no ip source-route

!

!

!

!

ip cef

no ip bootp server

no ip domain lookup

ip domain name yourdomain.com

!

multilink bundle-name authenticated

!

!

crypto pki trustpoint TP-self-signed-120604203

enrollment selfsigned

subject-name cn=IOS-Self-Signed-Certificate-120604203

revocation-check none

rsakeypair TP-self-signed-120604203

!

!

!

!

username cisco privilege 15 secret 5 $1$FV/I$PTSil.8JhU40G3MnPb.5Y.

--More--                           archive

log config

  hidekeys

!

!

!

!

!

!

!

!

interface FastEthernet0/0

description ## Interface For Tulip MPLS CKT_22702 VLAN_224 TN-70 ##

bandwidth 2048

ip address 10.237.9.18 255.255.255.252

ip accounting output-packets

duplex auto

speed auto

no cdp enable

arp timeout 30

!

interface FastEthernet0/1

ip address 10.10.40.105 255.255.252.0

ip flow ingress

duplex auto

speed auto

!

interface BRI0/0/0

no ip address

encapsulation hdlc

shutdown

!

interface Serial0/1/0

no ip address

shutdown

clock rate 2000000

!

router bgp 65001

bgp log-neighbor-changes

neighbor 10.10.40.100 remote-as 65001

neighbor 10.237.9.17 remote-as 65500

!

address-family ipv4

  neighbor 10.10.40.100 activate

  neighbor 10.237.9.17 activate

  no auto-summary

no synchronization

  network 10.0.0.0

  network 10.10.40.0 mask 255.255.252.0

exit-address-family

!

ip forward-protocol nd

ip route 10.10.140.0 255.255.255.0 10.10.40.71

ip route 10.20.235.0 255.255.255.0 10.10.40.71

ip http server

ip http access-class 23

ip http authentication local

ip http secure-server

ip http timeout-policy idle 60 life 86400 requests 10000

!

ip flow-export source FastEthernet0/1

ip flow-export version 5

ip flow-export destination 10.10.40.14 9230

!

!

access-list 182 permit tcp host 10.10.43.56 any eq telnet

access-list 182 permit tcp host 10.10.43.241 any eq telnet

access-list 182 permit tcp host 10.10.40.250 any eq telnet

!

!

snmp-server community tulip RO

snmp-server community h0Wd@r3U RW

snmp-server ifindex persist

snmp-server host 10.10.40.13 h0Wd@r3U

snmp-server host 10.10.40.14 h0Wd@r3U

snmp-server host 10.10.40.15 h0Wd@r3U

snmp-server host 10.10.42.20 h0Wd@r3U

!

control-plane

!

banner motd ^CCCCC

^C

!

line con 0

password 7 062B1D741D402D1054

login local

line aux 0

line vty 0 4

access-class 182 in

privilege level 15

password 7 080C5E1B5817211E43

login

transport input telnet ssh

line vty 5 15

access-class 23 in

privilege level 15

login local

transport input telnet ssh

!

scheduler allocate 20000 1000

end

In this config interface Fast0/1 has address of 10.10.40.105. And looking at the traceroute results we see that this is the device that did generate a response at hop 2. The device that we need to see the configuration is the device at hop 3.

The description in the other FastEthernet interface suggests that this device at hop 3 is MPLS. Perhaps this has something to do with why it is not generating the response in traceroute.

HTH

Rick

HTH

Rick

Now what am i do for this problem.

Pls tell me the solution.

We still do not have sufficient information to know what is exactly the problem or what you might do about it.

Is the router at the third hop one that you control? If so then post its configuration. If it is not one that you control then the only thing that you can do is to talk with whoever does control it and ask about why it does not respond to traceroute.

HTH

Rick

HTH

Rick
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