Wired Intelligent Edge (Campus Switching and Routing)

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Aruba 5412R zl2 Switch-Latency issue

Hi,

 

We have bought new aruba 5412R zl2 swicth and we have just given ip on vlan1      172.16.1.1 and direct connecting one laptop with switch  and  we are getting latency while pinging ........Please go through the attach snap shot for better understand....

mkk
Contributor II

Re: Aruba 5412R zl2 Switch-Latency issue

Ping isnt a performance measurement. The ping icmp service have one of the most lowest priority on a switch.

If you like to test performance use iperf and test on tcp or udp protocol, not icmp.
Regular Contributor I

Re: Aruba 5412R zl2 Switch-Latency issue

Worth a mention this HPE Support Center storical article about that (this opens another series of questions: what your Switch is currently doing? then you can start to diagnose if its CPU is intesively processing traffic at a point that ICMP traffic is slowed down, given that its low priority, as needed due to network traffic conditions).

mkk
Contributor II

Re: Aruba 5412R zl2 Switch-Latency issue

I also see this kind of ping delays in the past in some older firmware releases. What firmware is in use?
Occasional Contributor I

Re: Aruba 5412R zl2 Switch-Latency issue

Could you share the output of "show system" and "show cpu", I would like to know if the CPU utilization is high.

Occasional Contributor I

Re: Aruba 5412R zl2 Switch-Latency issue

Also please share the firmware/software version running  on the switch.

You can get it by running the command" show version" & "show flash".

Re: Aruba 5412R zl2 Switch-Latency issue

Daer MKK,

 

Thanks for your reply,  Current Firmware : KB.16.02.0013 ....

 

Regards

Rahbar

Re: Aruba 5412R zl2 Switch-Latency issue

Hi,

 

Please find below output..

 

HP-VSF-Switch(config)# sh system

Status and Counters - General System Information

System Name : HP-VSF-Switch
System Contact :
System Location :

Allow V2 Modules : No
MAC Age Time (sec) : 300
Time Zone : 0
Daylight Time Rule : None

Software revision : KB.16.02.0013
Base MAC Addr : ecebb8-e6ed7f

VSF-Member :1

ROM Version : KB.16.01.0006
Up Time : 2 days
CPU Util (%) : 2
MAC Addr : ecebb8-e6ed00
Serial Number : SG7BG4B0BN
Memory - Total : 704,561,152
Free : 519,457,672

 

VSF-Member :2

ROM Version : KB.16.01.0006
Up Time : 2 days
CPU Util (%) : 0
MAC Addr : ecebb8-e58500
Serial Number : SG7BG4B0B3
Memory - Total : 704,561,152
Free : 535,067,936

HP-VSF-Switch(config)#
HP-VSF-Switch(config)#

 

HP-VSF-Switch(config)# show cpu

2 percent busy, from 300 sec ago
1 sec ave: 2 percent busy
5 sec ave: 2 percent busy
1 min ave: 7 percent busy

HP-VSF-Switch(config)#

 

 

Occasional Contributor I

Re: Aruba 5412R zl2 Switch-Latency issue

Hi,

 

Thank you for the information, the CPU utilization looks normal.

As observed in the release notes of the firmware's after "KB.16.02.0013".

There was a issue reported for slowness in ping response in a SSH session between switch and radius server, as shown in the below attached image.

I would recommend you to update the firmware to the maintenance release of "KB.16.02.0022m".

 

I hope this information is helpful 

If you like my posts, kudo's are welcome. If it solves your problem, please click 'Accept as Solution'.

 

Thanks

Kashif Khan

 

 

 

Regular Contributor I

Re: Aruba 5412R zl2 Switch-Latency issue

That's interesting.

I too have a pair of Aruba 5400R zl2 (6 slots in my case) deployed by using VSF (using two 10G DACs between them) and back-to-back OoBM based MAD: their software is actually KB.16.05.0007.

I tested one hundred of Pings from a VM (on a routed subnet) to one VLAN IP address definded on VSF via another frontend switch (another Aruba 5412R zl2 which is doing the routing part) and no ping loss, I've just seen 2 ping with higher values (typically on the 30-70 ms range if compared to sub millisecond average value) but I consider them just glitches since the VSF is running normally both in terms of CPU and traffic carried over on its various interfaces/trunks.

 

Just as reference below the HPE IMC 7.3 E0605 Standard (Trial) Ping monitoring:VSF_VLAN_7_ping_monitoring.png

 as you see nothing unusual.

 

 

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