Setup: NAS connected to one Cisco 3560 with 1Gb/s interface. Trunk from 3560 to 6509(a) with 1Gb/s. Trunk from 6509(a) to another 6509(b) with 10Gb/s. One port with 1Gb/s connected to a windows 2008 server.
The 6509 are configured with VRF's, VLAN's and HSRP. One VRF has 2 VLAN's connected. Routing between those VLAN's works fine.
When both the windows 2008 server and the NAS are in the same VLAN, traffic both ways works with good throuput. When the server and NAS are in different VLAN's but same VRF. Trafikk from NAS to server works good, but when we initiate traffic from server to NAS teh speed is reduce with nearly 50%.
Why? What shall I look for?