802.1q VLAN tagging (more info)

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To: <crist.clark@globalstar.com>, "'List, Sun Managers'" <sunmanagers@sunmanagers.org>
Date: Wed, 30 Nov 2005 06:59:58 -0500

Here is some more info:

1) For the other VLANs (at this point I am only talking about local traffic
for each vlan) i.e. VLAN 247 is for 172.16.247.0/24. When I try to ping a
host on that VLAN, the name resolves alright at the system level (hosts
file). But then the arp requests go unanswered. I tried hosts that are on
the same switch as well as hosts that are on different switches in order to
ensure that it wasn't a trunking issue between the switches.

2) Basically most of my tests were ping related...if I can not ping on the
local subnet, I can not do anything else.

3) It seems that on the switch it always defaulted to VLAN249 so either
there is something wrong with the switch config or 802.1q isn't working
properly on this server itself.

4) I suppose I should have also mentioned the version of Solaris. Solaris
8 64-bit on an E420R with lastest recommended patches as of June...and then
a some security patches that have come out since.

5) The Gig card on this server was originally a ge card which I replaced
about 2 months ago with a ce card.

Regards,
Marco

-----Original Message-----
From: Crist Clark [mailto:crist.clark@globalstar.com]
Sent: November 29, 2005 6:03 PM
To: Marco Greene (ML)
Subject: Re: 802.1q VLAN tagging

Marco Greene (ML) wrote:
> Hi all,
>
> I have a curious problem. I installed a CE card (ce1) and configured it
to
> use three different VLANs. 247,248,249. All of the 249 stuff seemed to
> work; however, the communications to the other VLANs did not. ifconfig
> reveals
>
> ce249001
> ce248001
> ce247001
>
> all configured with the proper IP addresses, gateways and subnet masks.

Or so you think. If one VLAN worked and the others did not, it seems quite
possible that it could be a routing issue. What do you mean by the others
didn't work? What kind of tests did you do? Did you do any network captures?

>>From a switch perspective...they are CISCO 3500 series switches (5 of
them).
> The trunk ports have been setup for 802.1q between the switches and the
> ports for this sun server is also setup as a 802.1q trunk. I also have a
> Windows box which also was setup for VLAN tagging and it seemed to work OK
> across all three VLANs. So I am pretty sure that my switch configuration
is
> setup properly. (Not 100% sure but pretty sure).
>
> Because we were making the change to a production environment, I needed to
> rollback the changes. I am going to try again in a few weeks but I would
> like to armed with a little more information than the one pager that sun
> provides with their documentation.
>
> Any thoughts and will summarize.

My first thought is that you'll likely need to offer a lot more information
to get some help on this. You should probably do some network captures
to see what is actually going out on the wire. Also, looking at counters
on the switch could help.

--
Crist J. Clark                               crist.clark@globalstar.com
Globalstar Communications                                (408) 933-4387
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