Date: Wed, 13 Sep 2006 15:09:56 +0200 From: "Slawek Zak" <slawek.zak@gmail.com> To: freebsd-net@freebsd.org Subject: Rapid link state changes on bge(4) interface Message-ID: <787bbe1c0609130609l33fb29dawc465b7bcfb2f430e@mail.gmail.com>
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Hi, I'm testing network failover on IBM BladeCenter running FreeBSD 6.1 STABLE for Sep 6th. I suspect a problem with link state change detection in bge code. When I disable internal port on chassis built-in ethernet switch, kernel floods syslog with messages about link state changes and coalescing them. Log snippet follows: Sep 13 14:58:28 w3-6 kernel: bge1: link state changed to DOWN Sep 13 14:58:28 w3-6 kernel: bge1: link state changed to UP Sep 13 14:58:29 w3-6 kernel: bge1: link state changed to DOWN Sep 13 14:58:29 w3-6 kernel: bge1: link state changed to UP Sep 13 14:58:29 w3-6 kernel: bge1: link state changed to DOWN Sep 13 14:58:29 w3-6 kernel: bge1: 4 link states coalesced Sep 13 14:58:29 w3-6 kernel: bge1: link state changed to DOWN Sep 13 14:58:29 w3-6 kernel: bge1: 11 link states coalesced Sep 13 14:58:29 w3-6 kernel: bge1: link state changed to UP Sep 13 14:58:30 w3-6 kernel: bge1: link state changed to DOWN Sep 13 14:58:30 w3-6 kernel: bge1: 3 link states coalesced Sep 13 14:58:30 w3-6 kernel: bge1: link state changed to UP Sep 13 14:58:30 w3-6 kernel: bge1: 7 link states coalesced Sep 13 14:58:30 w3-6 kernel: bge1: link state changed to DOWN Sep 13 14:58:30 w3-6 kernel: bge1: 4 link states coalesced Sep 13 14:58:30 w3-6 kernel: bge1: link state changed to DOWN Sep 13 14:58:30 w3-6 kernel: bge1: 2 link states coalesced As you can see, messages are generated in rapid succession and therefore any probing of link state change by ng_one2many for interface failover is meaningless. Ethernet switch doesn't register and log any interface state changes after disabling this port. LS20 blades use chipset 8850. My firmware is 3.38, full changelog, if it is of any help, is here: http://www-307.ibm.com/pc/support/site.wss/license.do?filename=pc_servers/brcm_fw_nic_12021_anyos_anycpu.chg Any ideas what might be wrong? /S -- Sławek Żak / UNIX Systems Administrator
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