Any Cisco switch/IOS Gurus here?

[kod3001]

omslaw, if you don't get this fixed soon, this may become the longest thread in history

 

[omslaw]

next bit should be piece of cake...

if the os on the server is adding the tags can you get it to untag vlan 1 ?

if the server won't allow it, change the native vlan on g0/2

Nope, that didn't work. Still doensn't pass traffic on VLAN1. I passes all other vlans, though.



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[kod3001]

the same principle that applies between the Cisco and 3com should be the same to the server.

 

[omslaw]

omslaw, if you don't get this fixed soon, this may become the longest thread in history

LOL!

But hey, we're all learnin' somethin', right?

 

[omslaw]

Try doing a "Show switchport trunk allowed" command to see if VLAN 1 is a member.

Also check "show switchport trunk pruning vlan" list to see if VLAN1 is a member.

No go with that command:

Switch#show switchport trunk allowed
^
% Invalid input detected at '^' marker.

Switch#



<!--EDIT|omslaw
Reason for Edit: None given...|1130272158 -->

 

[kod3001]

When this finally gets sorted, you should consider a long weekend at the office to setup vlan 1 just for management traffic, it'll save probs in the future, and you'll make your network scaleable.

We use something like this:
VLAN 1 - Network management
VLAN 10 and above - Interconnect VLANs - between layer 3 distribution switches and IP VPN routers etc.
VLAN 100 and above - Servers
VLAN 500 and above - Users

 

[kod3001]

geez, see what I mean, page 4 already

 

[kod3001]

Try doing a "Show switchport trunk allowed" command to see if VLAN 1 is a member.

Also check "show switchport trunk pruning vlan" list to see if VLAN1 is a member.

No go with that command:

Switch#show switchport trunk allowed
            ^
% Invalid input detected at '^' marker.

Switch#

VLAN 1 won't be removed from the trunk unless you have implicitly told it to.

show int trunk will give you all the detail you want about what the trunk is doing.

 

[omslaw]

Switch#sh int trunk

Port Mode Encapsulation Status Native vlan
Gi0/2 on 802.1q trunking 4000
Gi0/15 on 802.1q trunking 1
Gi0/17 on 802.1q trunking 1

Port Vlans allowed on trunk
Gi0/2 1-12
Gi0/15 1
Gi0/17 1-12

Port Vlans allowed and active in management domain
Gi0/2 1-12
Gi0/15 1
Gi0/17 1-12

Port Vlans in spanning tree forwarding state and not pruned
Gi0/2 1-12
Gi0/15 1
Gi0/17 1-12

 

[kod3001]

I'm thinking its the same principle to the server, or rather the same problem you had trunking to the 3com switch, does the server not allow you to untag vlan 1 ?

 

[omslaw]

Yeah, I can untag vlan1. Tried both tagged and untagged with the same results... VLAN1 won't work...all others do.

 

[kod3001]

when you untagged vlan 1 on the server, did you set the native vlan on g0/2 back to vlan 1, 'cause your gonna need to.

 

[omslaw]

Yes. Tried setting native to 1 and to something else...same results.

 

[kod3001]

Sorry to keep repeating the same thing, but I just want to be sure you've got the combination right.

you've untagged vlan 1 on the server?  and
set the native vlan to 1 on g0/2

any other combination isn't going to work, make sure you wait for the arp timers before changing anything too quick.



<!--EDIT|kod3001
Reason for Edit: None given...|1130274371 -->

 

[omslaw]

Yup. Vlan1 on the server *is* untagged. g0/2 is set to native vlan1.

No go. All OTHER vlans work...but not VLAN 1.

I think I'm in for some Network Reconfiguration

 

[kod3001]

at least you got blade 1 going. I'll bet blade 2 will work too, but it'll be another round of figuring it out. Its getting late here, I'll have a think in the morning.

Let me know if you get anymore progress.

 

[omslaw]

Thanks, KOD... 'preciate all the assistance!

 

[kod3001]

any time

 

[kod3001]

omslaw,

have a look at http://software.groupbrowser.com/archive/t-31362.html

Very similar environment where the poster 'frond' has had the same problem.
Only trouble is, the Cisco switch is a distribution 6500, so its set commands, particularly set dot1q-all-tagged enable

Just trying to find the same command for IOS, can't find one exact, but
'switchport trunk all vlan all' may do it.

 

[omslaw]

hmmmm.. so far, looks interesting. I'll see what happens...