02-25-2011 08:17 AM - edited 03-06-2019 03:45 PM
I connect a laptop (Intel NIC) to int gi0/5 on WS-C3560X-48T-S (IOS version: Version 12.2(55)SE1). When I try to ping one of the SVI interface address in 3650X, I found that the ping time will be fluctrated. Ping time: average = 5ms , Max. = (may up to 120ms).
The autonegotiation Setting on laptop NIC and int gi0/5 is enabled.
CLI on 3560X
!
interface GigabitEthernet0/5
switchport access vlan 107
switchport mode access
switchport nonegotiate
spanning-tree portfast
!
GigabitEthernet0/5 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is d0d0.fd00.c185 (bia d0d0.fd00.c185)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:07:06, output 00:00:01, 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: fifo
Output queue: 0/40 (size/max)
5 minute input rate 1000 bits/sec, 1 packets/sec
5 minute output rate 1000 bits/sec, 1 packets/sec
572 packets input, 51652 bytes, 0 no buffer
Received 200 broadcasts (16 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 16 multicast, 0 pause input
0 input packets with dribble condition detected
821 packets output, 66524 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
Can anyone tell me how to solve this issue?
Tang
02-25-2011 09:15 AM
That is normal . You shouldn't really ping internal switch interfaces as benchmark because it puts ping response on the low end of things it is supposed to be doing . Ping devices thru the switch if you want real ping response times.
02-25-2011 10:02 AM
As Glen said. ICMPs are not high priority for switches, and are subject to occasional slowness here and there depending on the other processes occupying the switch's CPU at a particular point of time. The best way to test latency is to check pings through the device, i.e. from one host to another host across the switch.
Cheers!
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide