Hi all, I have db volumes on Netapp filer and it is mounted as NFS from AIX point of view.Recently I migrated db volumes to this mount point on 100mbps /sec on its NAS interface.
But later migrated to 1GB Network interface ,i.e netapp interface which is also on 1GB interface connected to AIX p server. Now my question is when I have CISCO 4000 Switch in between the observation was found degradation in performance.So I enabled jumbo frames on GB NICard on both sides i.e on AIX as well as on NT side i.e 9000 mtu size .Now futher degradation has taken place which was not tolerable. It was found that CISCO switch mtu size was 1500 and that of both servers it was 9000(jumbo frames). Now my question is: 1.Is it sufficient just to change mtu size on switch or we need to do some tuneing further on switch. As per aix network is concerned I checked up tcp_sendspace , tcp_recvspace so I enabled rfc1323=1. thewall is 1/2 of ram i.e mbuff and I don't see any problem with analysis on netstat-m. sb_max is 475236 which is ok and I don't see any errors on interface. But I would like to know that what else I may be missing??? I need to improve performence but I see that there is degradation in comparision with 100mbps NIC on netapp. Please help me in this matter . Thanks Balanand Pinni
