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Latency check on Router interface

How can we check latency on any Router interface.

Thanx....

3 REPLIES
Hall of Fame Super Silver

Re: Latency check on Router interface

Hello Arjun,

you can check that the interface queues are not full with

sh int type x/y

Example:

RT-LONDON-E-1>sh int ser0/0

Serial0/0 is up, line protocol is up

Hardware is PowerQUICC Serial

Description: Link 2Mb ALBACOM --> RT-RM-TLD066-RG-BB-E-3 TD:W0L32037

Internet address is 10.110.0.222/30

MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,

reliability 255/255, txload 8/255, rxload 9/255

Encapsulation HDLC, loopback not set

Keepalive set (10 sec)

Last input 00:00:04, output 00:00:00, output hang never

Last clearing of "show interface" counters never

Input queue: 0/75/191/0 (size/max/drops/flushes); Total output drops: 8181

Queueing strategy: fifo

but to measure latency you need to send traffic with timestamps inside.

notice that you can roughly exstimate latency using RTT on an extended ping so you can try to perform an extended ping of an ip address on the same subnet.

so you can say latency = RTT / 2

This is a good method for serial links where only one device is at the other end of the link.

Hope to help

Giuseppe

New Member

Re: Latency check on Router interface

Hi..

Thanx a lot for reply.

what is RTT?

Cisco Employee

Re: Latency check on Router interface

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