Web and Unmanaged
cancel
Showing results for 
Search instead for 
Did you mean: 

HP 1920 - extreme slow VLAN routing

 
SOLVED
Go to solution
Highlighted
Occasional Advisor

HP 1920 - extreme slow VLAN routing

i have new HP 1920-24G Switch JG924A, Software Version 5.20.99 Release 1106

there are 2 vlans on it - vlan200 (servers) and vlan201 (workstations)

i want to route between these vlans and assign vlan ip to each of vlan, i can see routing table

all servers have default gateway as vlan200 ip

all workstations have default gateway as vlan201 ip

if i plug some workstation in vlan201 access port, then i have transfer speed between this ws and some server 100kbps-1mbps

if i change this port to vlan200 access port (server vlan), i have transfer speed on the same workstation between ws and server - 100Mbps.

 

also i have several workstations in vlan201 without this transfer speed problem.

 

my network topology is a little bigger then i describe here, but i think its not important at this time

 

have you any idea, why in some cases i have extremely slow network speed?

 

thanks

18 REPLIES 18
Highlighted
Occasional Advisor

Re: HP 1920 - extreme slow VLAN routing

p.s.: enabling/disabling/deleteing antivirus software on both sides takes no effect

 

Highlighted
Respected Contributor

Re: HP 1920 - extreme slow VLAN routing

Good problem. Have you done the analysis using wireshark / tcpdump?

**************************************
ATP FLEXNETWORK V3 | ACSA
Highlighted
Occasional Advisor

Re: HP 1920 - extreme slow VLAN routing

started on both sides, on workstation and server, wireshark shows the same pare Source-Dest (dest-source on the other side) with the same traffic ant layer 2 and at layer 3

 

vlan 1 -> vlan200 - speed id 100kbps-1mbps

 

just only changing vlan on access port of workstation (to vlan200, the same as destination server vlan) takes me to full speed

 

after 2 weeks testing i think its routing software error on l3 switch 1920-24g

 

also, another WS in vlan1, plugged at the same switch as previous WS, has no transfer speed problem while communitating wuth vlan200

 

Highlighted
Occasional Advisor

Re: HP 1920 - extreme slow VLAN routing

i found a lot of records with "TCP segment of a reassembled PDU" in wireshark running n "slow" ws

trying to find any info about it

Highlighted
Trusted Contributor

Re: HP 1920 - extreme slow VLAN routing

Could you paste current config along with port counters?

 

Could be faulty cable or interface (either at switch side or client side).

Highlighted
Occasional Advisor

Re: HP 1920 - extreme slow VLAN routing

files you are asked for are attached

its config of switch that route my subnets

at fact i just began to employ vlans on my old running network, create some vlans and attach some servers / workstations to them

but routing is slow and its no matter, if server and ws attached to the same phisical switch (but different vlans) or to different switches

Highlighted
Occasional Advisor

Re: HP 1920 - extreme slow VLAN routing

We have exactly the same Problems at our Office. We have 4 different 1920-24g (JG924A) and on all of them the same problems with Layer 3 Routing.
Is here at least one person who has “normal” speed on routed connections thru this Switch?
(on more than 2 VLAN and more than 2 computers)

Highlighted
Visitor

Re: HP 1920 - extreme slow VLAN routing

Having this problem too. We have an HP 1920 24G with a small number of VLANS configured. Initially speeds are as you would expect but they drop off significantly after about 24 hours. Rebooting the switch seems to rectify the issue but speeds drop away again to a paltry 1-2 MB/sec.

 

Our ADSL router can do better than this and is significantly cheaper.

 

Anyone considering buying one of these ( HP 1920 24G ) please save yourself the hassle. They do not work properly and support is non-existant, just look at this forum.

Highlighted
Occasional Advisor

Re: HP 1920 - extreme slow VLAN routing

We are folloing some ARP issues at the moment...after deleting the dynamic ARP entrys speed goes up again...