Original Message:
Sent: Aug 01, 2024 03:04 AM
From: oden74
Subject: Degraded performance and package duplication with CX 10000 (CX 10k) and private VLAN with Synergy
Hi, what is the MTU setting on the physical interfaces of the CX switch?
Regards
Anders
Original Message:
Sent: Jul 31, 2024 11:20 AM
From: AN23
Subject: Degraded performance and package duplication with CX 10000 (CX 10k) and private VLAN with Synergy
Hello all,
does someone already have experience with the setup of a CX 10k with HPE Synergy after deployment like described in https://www.arubanetworks.com/techdocs/AOS-CX/10.09/PDF/HPE_Synergy_and_CX_10000_Networking_Deployment_Guide.pdf ?
We have the problem of a huge withdraw in bandwidth and the breakage of UDP traffic since we moved all VMware VMs to the private VLAN. Currently the PSM is not active.
The following symptoms were observed.
IPERF3-Test
PVLAN -VM <=> PVLAN-VM => Degraded
Primary-VLAN <=> PVLAN-VM => 1 Gig/s
Ping
PVLAN-VM to PVLAN -VM => Duplicate Answers
Primary-VLAN <=> PVLAN -VM => Duplicate Answers
We see a huge number of Jumbo frames.
copp-policy statistics show a huge number of ip-exceptions.
Monitoring shows an increasing number of retransmits with more traffic on VMs.
Several applications using UDP, like Citrix, broke after moving the VM to the PVLAN. Both when accessing from VLAN 100 and from the PVLAN.
We had to disable duplicate address detection on all Windows devices. (See e.g. https://sps-support.honeywell.com/s/article/False-duplicate-IP-address-detected-on-Windows-devices or https://knowledge.broadcom.com/external/article/344094/automatic-private-ip-addressing-apipa-on.html) We did not disable GARP on the CX10k to avoid any side effects.
From the taken PCAPs we can see a quite big number of Malformed Packets" and „Unreassembled fragments" which is unusual.
Does somebody here had the same experience or has any ideas on this?
Best,
Adrian