Traceroute results are displayed very slow with no latency being observed

[Junaid Shah]

Hello,

When i run

traceroute

for any ip the results are displayed very slowly while there is not latency observed. It take a lot of time to display all the routes that are being taken to the destination. This is the case with both public and private ips. There is no latency on the routes but it takes too much time to display the routes I am using 2951 router. The memory and cpu utilization are normal. Any help would be appreciated. Thanks

[paolo bevilacqua]

The delay can be due to resolving a name from address, thing that you can disable.

[Junaid Shah]

how do i do that and why would i want to disable that as it helps. The

traceroute

works fine on other routers and the configuration is pretty much same.

[jawad-mukhtar · Accepted solution]

Traceroute

will try to do a DNS reverse  name lookup by default. Try 

no ip domain-lookup

or

Traceroute using numeric

tracerroute x.x.x.x numeric

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[Junaid Shah]

Thanks Jawad that sure helps and the

traceroute

results are fast now. But my main concern/point here is that i have two routers 2851 and 2951 and the domain name is same on both the routers. It works perfectly fine on 2851 but it gets way too slow on 2951. The numeric option can get me fast results but not the solution i guess in long run. What esle i need to check or change to get the

traceroute

results quick or normal with names enabled of different service providers in between. Thanks again man....

[Junaid Shah]

ok i just find out that the results without running the

numeric

command are

public ip's

only without names and they still are coming slow. But if i run the

traceroute xxxxx numeric 

command it appears fast. Does it appears to be a name resolution issue or something.

[jawad-mukhtar]

Hi You can do it but you have to disable

ip domain-lookup

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