We have a 2 sets of software/hardware exhibiting the same problem. The hardware is X4150 It is a Solaris10u7 fileserver Domu on a xVM Dom0. Everything works well for several weeks to a month and then the DomU looses network connectivity. Logging in through the console and rebooting solves the problem for another few weeks. The DomU uses a dedicated network port - e1000g1 Here is a output of kstat xnbo from the Dom0 when the connectivity has been lost. The network port affected is e1000g1. Any other info I can supply? Thanks for any ideas John xnbo:0:aux_statistics:allocation_failure 0 xnbo:0:aux_statistics:allocation_success 0 xnbo:0:aux_statistics:class net xnbo:0:aux_statistics:crtime 44.796535752 xnbo:0:aux_statistics:csum_hardware 5471579 xnbo:0:aux_statistics:csum_software 0 xnbo:0:aux_statistics:mac_full 0 xnbo:0:aux_statistics:other_allocation_failure 0 xnbo:0:aux_statistics:rx_allocb_failed 0 xnbo:0:aux_statistics:rx_cksum_deferred 0 xnbo:0:aux_statistics:rx_cpoparea_grown 1 xnbo:0:aux_statistics:rx_foreign_page 0 xnbo:0:aux_statistics:rx_notify_deferred 1040865 xnbo:0:aux_statistics:rx_notify_sent 18274036 xnbo:0:aux_statistics:rx_pageboundary_crossed 51131 xnbo:0:aux_statistics:rx_rsp_notok 0 xnbo:0:aux_statistics:rx_too_early 359 xnbo:0:aux_statistics:small_allocation_failure 0 xnbo:0:aux_statistics:small_allocation_success 0 xnbo:0:aux_statistics:snaptime 4271382.71231202 xnbo:0:aux_statistics:spurious_intr 2 xnbo:0:aux_statistics:tx_allocb_failed 0 xnbo:0:aux_statistics:tx_cksum_no_need 5471579 xnbo:0:aux_statistics:tx_notify_deferred 658150 xnbo:0:aux_statistics:tx_notify_sent 4944719 xnbo:0:aux_statistics:tx_too_early 0 xnbo:1:aux_statistics:allocation_failure 0 xnbo:1:aux_statistics:allocation_success 0 xnbo:1:aux_statistics:class net xnbo:1:aux_statistics:crtime 195.008386765 xnbo:1:aux_statistics:csum_hardware 7430303 xnbo:1:aux_statistics:csum_software 0 xnbo:1:aux_statistics:mac_full 0 xnbo:1:aux_statistics:other_allocation_failure 0 xnbo:1:aux_statistics:rx_allocb_failed 0 xnbo:1:aux_statistics:rx_cksum_deferred 0 xnbo:1:aux_statistics:rx_cpoparea_grown 1 xnbo:1:aux_statistics:rx_foreign_page 0 xnbo:1:aux_statistics:rx_notify_deferred 1085341 xnbo:1:aux_statistics:rx_notify_sent 12103641 xnbo:1:aux_statistics:rx_pageboundary_crossed 6267 xnbo:1:aux_statistics:rx_rsp_notok 0 xnbo:1:aux_statistics:rx_too_early 98 xnbo:1:aux_statistics:small_allocation_failure 0 xnbo:1:aux_statistics:small_allocation_success 0 xnbo:1:aux_statistics:snaptime 4271382.7126705 xnbo:1:aux_statistics:spurious_intr 11 xnbo:1:aux_statistics:tx_allocb_failed 0 xnbo:1:aux_statistics:tx_cksum_no_need 7430303 xnbo:1:aux_statistics:tx_notify_deferred 2797109 xnbo:1:aux_statistics:tx_notify_sent 4846740 xnbo:1:aux_statistics:tx_too_early 0 xnbo:2:aux_statistics:allocation_failure 0 xnbo:2:aux_statistics:allocation_success 0 xnbo:2:aux_statistics:class net xnbo:2:aux_statistics:crtime 203.425454162 xnbo:2:aux_statistics:csum_hardware 83384732 xnbo:2:aux_statistics:csum_software 0 xnbo:2:aux_statistics:mac_full 0 xnbo:2:aux_statistics:other_allocation_failure 0 xnbo:2:aux_statistics:rx_allocb_failed 0 xnbo:2:aux_statistics:rx_cksum_deferred 0 xnbo:2:aux_statistics:rx_cpoparea_grown 1 xnbo:2:aux_statistics:rx_foreign_page 0 xnbo:2:aux_statistics:rx_notify_deferred 58476630 xnbo:2:aux_statistics:rx_notify_sent 98218487 xnbo:2:aux_statistics:rx_pageboundary_crossed 34458829 xnbo:2:aux_statistics:rx_rsp_notok 0 xnbo:2:aux_statistics:rx_too_early 75 xnbo:2:aux_statistics:small_allocation_failure 0 xnbo:2:aux_statistics:small_allocation_success 0 xnbo:2:aux_statistics:snaptime 4271382.71290983 xnbo:2:aux_statistics:spurious_intr 908 xnbo:2:aux_statistics:tx_allocb_failed 0 xnbo:2:aux_statistics:tx_cksum_no_need 83384732 xnbo:2:aux_statistics:tx_notify_deferred 19261647 xnbo:2:aux_statistics:tx_notify_sent 64178164 xnbo:2:aux_statistics:tx_too_early 0 xnbo:3:aux_statistics:allocation_failure 0 xnbo:3:aux_statistics:allocation_success 0 xnbo:3:aux_statistics:class net xnbo:3:aux_statistics:crtime 365.369962207 xnbo:3:aux_statistics:csum_hardware 1104176337 xnbo:3:aux_statistics:csum_software 0 xnbo:3:aux_statistics:mac_full 0 xnbo:3:aux_statistics:other_allocation_failure 0 xnbo:3:aux_statistics:rx_allocb_failed 0 xnbo:3:aux_statistics:rx_cksum_deferred 0 xnbo:3:aux_statistics:rx_cpoparea_grown 1 xnbo:3:aux_statistics:rx_foreign_page 0 xnbo:3:aux_statistics:rx_notify_deferred 54902916 xnbo:3:aux_statistics:rx_notify_sent 1062421103 xnbo:3:aux_statistics:rx_pageboundary_crossed 90333899 xnbo:3:aux_statistics:rx_rsp_notok 0 xnbo:3:aux_statistics:rx_too_early 104 xnbo:3:aux_statistics:small_allocation_failure 0 xnbo:3:aux_statistics:small_allocation_success 0 xnbo:3:aux_statistics:snaptime 4271382.71316187 xnbo:3:aux_statistics:spurious_intr 16509 xnbo:3:aux_statistics:tx_allocb_failed 0 xnbo:3:aux_statistics:tx_cksum_no_need 1104176337 xnbo:3:aux_statistics:tx_notify_deferred 286565966 xnbo:3:aux_statistics:tx_notify_sent 843581102 xnbo:3:aux_statistics:tx_too_early 0 -- John Landamore Department of Computer Science University of Leicester University Road, LEICESTER, LE1 7RH J.Landamore@mcs.le.ac.uk Phone: +44 (0)116 2523410 Fax: +44 (0)116 2523604