03-10-2019 10:52 PM
Hello everyone.
I'm currently reading through the QoS config guide for 2960x switches. I've done some of the examples shown in that document but I'd like to know how I can verify each of the steps, i.e. classification (acls, class map, policy map), marking, policing, etc. I was hoping to find a debug command that would have shown traffic hitting criteria for the classifying step and then from there see the different policies applied but I have yet to find that. Are there counters I could possibly use at each stage to confirm that my tests are indeed successful?
03-11-2019 12:21 AM
Use iperf. This will allow you to simulate traffic on certain ports and you can test if at least the dscp values are honoured. It will also allow you to fill up traffic clases. You can use wireshark as well as as secondary tool
03-21-2019 06:47 PM
Thank you for the suggestion but it seems the manipulation of DSCP/TOS values for iPerf isn't being reflected. it's possibly because of restrictions on Windows preventing the changes from being seen at the remote or local end by Wireshark.
03-11-2019 12:37 AM
Adding to other post suggested.
Onec you build the connection you can use Ostinator for Packet generation, make sure they marked correctly
03-11-2019 01:24 AM
You can do it through TOS values , ping the exact TOS value like EF 46 Voice is 184etc , then check the QOS queue
#ping
Protocol [ip]:
Target IP address: 1.1.1.1
Repeat count [5]: 10
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface:
Type of service [0]: 184
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 10, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 10/14/30 ms
03-21-2019 06:51 PM
03-21-2019 09:14 PM
03-25-2019 04:16 AM
03-21-2019 06:49 PM
I haven't been able to get Ostinato to read the interfaces on my test Windows PCs. It's quite odd, but I am using one of the older and free versions. I saw it work on my main machine but on none of my 3 test machines (actual hardware, not VMs). i'd rather not spend the time troubleshooting a supposed solution. Thank you.
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