Cross connecting off-site switch

[MichaelGruber]

Hello,

I have at our office a 5412zl switch which has been in production for quite some time and working fine.  We have opened an off-site disaster recovery site and purchased a 5406zl switch for that site.  Our production servers are at the DR site on the 5406 with a Gig-E layer2 link between the 2 switches.  We are finding though that we are experiencing slower responses for one of our SQL server apps and in doing a simple wireshark sniff on the packet traffic, we're finding that there are malformed packets being transmitted back.

The server environment is Microsoft 2012R2 running Hyper-V with 2 NICs on the server teamed and connected as a trunk on the 5406 being used as the Virtual Lan Switch in Hyper-V.

The ports on either side of the Gig-E link are tagged for all vlans and the default vlan is untagged.

Can anyone let me know if this is the correct way to set this up?  Thanks!

[Vince-Whirlwind]

Find out where the malformed packets are being generated.

Check all your switchports error statistics.

Swap all your patch leads. Clean your fibre patch leads ends.