ESVT does not run with Size Frame bigger than 1518 bytes

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  • Updated 1 year ago
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Hello all,

I am using two X770, and I am testing the throughput using the ESVT tool.

For that test, I enable the jumbo frames in both switches, and create the test vlan to test a 40Gb link.

If I run the test with a Size Frame of 64 or 1518, it runs fine, and with no problems.

But, If I increment the size to another value more than 1518 it does not work.

Do you know if this is a limitation of the tool ESVT?

I also increase the ip-mtu size of the vlan to 9194, but with no success.

create vlan test40Gb tag 1040
configure vlan test40Gb add port 1:101 tagged
configure vlan test40Gb ipaddress 10.0.40.1/24 (and 10.0.40.2/24 in the other switch)
enable ipforwarding test40Gb

enable jumbo-frame ports all
configure ip-mtu 9194 "test40Gb"

run esvt traffic-test "test40Gb" loopback-port 1:97 peer-switch-ip 10.0.40.2 packet-size 9000 rate 40 Gbps duration 60 seconds

====================================================================================
VLAN       Status   Loopback   Duration    Tx Rate   Tx Frame   Tx Total   Rx Total
                      Port    (hh:mm:ss)    (Kbps)     Size      Frames     Frames
====================================================================================
test40Gb   Completed  1:97     00:01:00  40000000        64  3407020474 3407020474  
test40Gb   Completed  1:97     00:01:00  40000000      1518   195051038  195051038  
test40Gb   Error           1:97     00:01:00  40000000      9000           0          0

====================================================================================
VLAN Name                      :  test40Gb  
Port                                    :  1:101     
IP Address                         :  10.0.40.2 
Status                               :  Error     
Duration (hh:mm:ss)          :  00:01:00
Loopback Port                   :  1:97      
TX rate (Kbps)                   :  40000000  
TX Frame Size (bytes)       :  9000      
TX Frame                           :  0         
RX Frame                           :  0         
Frames Lost                        :  0         
Error Cause                      :

<Erro:ESVT.TxPDUFail> Slot-1: Transmit PDU Failed from port 1:97; Reason[Failed to Send packet to loopback port]

Thanks for any suggestions.
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Xperia Go

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Posted 1 year ago

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Stephen Williams, Employee

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This is a known issue. This should get fixed but it's not currently scoped for any release.

https://gtacknowledge.extremenetworks...
(Edited)
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Xperia Go

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Ok understood, thanks for the reply.