Date: Mon, 23 Aug 2010 15:32:59 -0400 From: Mike Tancsa <mike@sentex.net> To: xavier.humbert@groumpf.org (Xavier HUMBERT), freebsd-net@freebsd.org Subject: Re: Inter-vlan routing problem Message-ID: <201008231932.o7NJWuPS036366@lava.sentex.ca> In-Reply-To: <1jnowhj.1pd0hjz1mufqimM%xavier.humbert@groumpf.org> References: <201008201711.o7KHBnfT011714@lava.sentex.ca> <1jnowhj.1pd0hjz1mufqimM%xavier.humbert@groumpf.org>
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At 12:34 PM 8/23/2010, Xavier HUMBERT wrote: >Mike Tancsa <mike@sentex.net> wrote: > > > I dont understand, why is 10.75.2.1 going out your default interface > > ? It should look for packets on the same subnet that the vlan3 > interface is on > >Errrr.... According to the interfaces status and the routing table, >this is the >case, or do I misunderstand your question ? The traceroute you showed was going out the default gateway. I guess that was a workstation on just one subnet. Lets start with the obvious, you have sysctl -a net.inet.ip.forwarding set to one right ? > > Can you do an > > arp -na > > and > > netstat -Wnra > > > >[root@gateway ~]# arp -na >? (10.75.3.251) at 00:e0:81:2d:62:3e on vlan4 permanent [vlan] >? (10.75.3.254) at 08:00:71:03:f1:0f on vlan4 expires in 1192 seconds [vlan] >? (10.75.3.252) at 00:1a:a0:12:9a:a1 on vlan4 expires in 850 seconds [vlan] >? (10.75.2.1) at 00:12:ef:42:3c:f3 on vlan3 expires in 848 seconds [vlan] >? (10.75.2.5) at 00:1b:25:5f:58:5d on vlan3 expires in 432 seconds [vlan] OK, you see MAC addresses from the other devices and they seem to be on the correct interfaces. you can ping them right ? They all have you as the default gateway ? e.g. if you do ping -S 102.168.0.251 192.168.0.254 ping -S 10.75.2.251 192.168.0.254 do both work ? Does 192.168.0.254 have 192.168.0.251 as the default gateway ? ---Mike > > On the nortel switch, are you sure you have it on the equiv of a > > "trunk" port? Is there a way to see what MAC addresses the switch > > sees as part of what VLAN ? > >No, there is no "trunk" ports. The term trunk is used by Nortel for MLT. And, >precisely, that what's "show mac-address-table" displays : the MLT table. The >port I'm connected to is simply a port shared by all Vlans. OK, but the port will tag all the packets leaving it with the correct vlan right ? Some switches offer a "hybrid" mode were the packets all exit the port untagged. But based on your arp table, this does not seem to be the case which is good. ---Mike -------------------------------------------------------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet since 1994 www.sentex.net Cambridge, Ontario Canada www.sentex.net/mike
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