LAN Ping Response High Issue

[MohanBabu2287]

Could you please assist me on blow issue.

Problem Statement

Ping results goes high response for VLAN interface from switch where the VLAN interface created.

E.g.  

SES220-127050# sh config vlan

Startup configuration: 33

vlan 1

   name "DEFAULT_VLAN"

   tagged 1/8,1/10,1/12,1/20,1/24,2/8,2/10,2/12,2/20

   no untagged 1/1-1/7,1/9,1/11,1/14,2/1-2/7,2/9,2/11,2/13-2/14

   untagged 1/13,1/15-1/19,1/21-1/23,2/15-2/19,2/21-2/24

   ip address 2.20.8.250 255.255.0.0

   exit

vlan 1010

   name "ClientD1"

   tagged 1/18-1/20,1/23-1/24,2/18-2/20,2/23-2/24

   ip helper-address 10.35.122.4

   ip address 10.35.113.1 255.255.255.0

   exit

vlan 3002

   name "Network"

   tagged 1/18-1/19,1/23,2/18-2/19,2/23-2/24

   untagged 1/20,1/24,2/20

   ip helper-address 10.35.122.4

   ip address 10.35.127.50 255.255.255.0

   exit

SES220-127050#   ping 2.20.8.250  re 100

2.20.8.250 is alive, iteration 99, time = 1 ms

2.20.8.250 is alive, iteration 100, time = 1 ms

100 packets transmitted, 100 packets received, 0% packet loss

round-trip (ms) min/avg/max = 1/1/50

SES220-127050#   ping 10.35.113.1  re 100

10.35.113.1 is alive, iteration 100, time = 1 ms

100 packets transmitted, 100 packets received, 0% packet loss

round-trip (ms) min/avg/max = 1/1/31

SES220-127050#   ping 10.35.127.50 re 100

10.35.127.50 is alive, iteration 100, time = 1 ms

100 packets transmitted, 100 packets received, 0% packet loss

round-trip (ms) min/avg/max = 1/1/45

Action taken in LAN :

• The switch has been replaced and updated with latest firmware
• All  switch configuration were reviewed and as per the standard
• No hardware issue/loop observed in the network
• Based on HPE Support Case 5348116475, we have removed unwanted QOS settings and implemented Spanning tree protocol & removed loop protection in the switches.

[Ivan_B]

Hi @MohanBabu2287 !

I am not sure where do you see any issue here. You have zero packet loss, very low average response time and just one-two replies <50 ms. Also, these tests show absolutely nothing and have absolutely no meaning. Every modern switch has data plane decoupled from control/management plane. The main purpose of a switch is to forward traffic between hosts, e.g. transit traffic is its main focus. This forwarding happens in the data plane and normally at line-rate with minimal delays. When you ping a Vlan interface of a switch, you contact switch CPU and since it's not very mighty you may see delays and even drops. ICMP requests to the CPU are processed with lowest priority. BTW, just FYI - ping is not a performance measurement tool.

If you want to run more meaningful performance tests in your network, use some proper tool. I'd start with iperf as a starting point.

[Ivan_B]

Hi @MohanBabu2287 !

If my proposed solution helped you, please, mark the post as accepted solution. If you need any further clarification, just let me know.

Thank you!