On Tue, 15 Mar 2005, Nikolay Kryukov wrote:
It's the case of incorrect configuration. Equal mac addresses must not exist in different ports on the same vlan on catalyst switches. They may cause problems like:
'k, now I'm confused ... I hadn't noticed that, but how is it that they are 'equal'? I take it that 00:0b:bf:42:a8:06 is the MAC on the switch itself, since that machines MAC addresses are:
ether 00:07:e9:05:1b:2e
ether 00:07:e9:05:1b:2fdoes the cisco switch 'share' a mac across all ports?
http://www.ciscotaccc.com/lanswitching/showcase?case=K19174025 and, consequently, high latency.
MGF> Testing my network, I just noticed the following:
MGF> --- 200.46.204.1 ping statistics --- MGF> 4 packets transmitted, 4 packets received, 0% packet loss MGF> round-trip min/avg/max/stddev = 399.664/407.119/420.315/8.267 ms
MGF> --- 200.46.208.1 ping statistics --- MGF> 3 packets transmitted, 3 packets received, 0% packet loss MGF> round-trip min/avg/max/stddev = 373.045/409.266/453.402/33.280 ms
MGF> 400ms to my default router seems a wee bit high ...
MGF> I'm suspecting that it has to do with:
MGF> Mar 15 01:13:28 neptune last message repeated 10 times MGF> Mar 15 01:13:28 neptune /kernel: arp: 200.46.204.1 is on MGF> em0 but got reply from 00:0b:bf:42:a8:06 on em1 MGF> Mar 15 01:13:28 neptune /kernel: arp: 200.46.208.1 is on MGF> em1 but got reply from 00:0b:bf:42:a8:06 on em0
MGF> In order to provide network redundancy, and simplify our scripting, with MGF> have one network bound to one ethernet port, and the other network bound MGF> to the second one on the same machine ...
MGF> I'm plugging everything into a Cisco 2924 ... is there some way, either on MGF> the FreeBSD side, or Cisco, of 'cleaning this up'?
MGF> ---- MGF> Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) MGF> Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664 MGF> _______________________________________________ MGF> freebsd-net@freebsd.org mailing list MGF> http://lists.freebsd.org/mailman/listinfo/freebsd-net MGF> To unsubscribe, send any mail to MGF> "[EMAIL PROTECTED]"
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---- Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664 _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
