VLANS trunking

VLANS trunking

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Subject Author Date
VLANS trunking bison 06-14-2006
Posted by bison on June 14, 2006, 9:41 am
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Hi

I have following netowork:


VLAN1 VLAN1 VLAN2 VLAN2 VLAN1 VLAN1
host1--------------switch1-------------switch2-------------host2

Everything ports are in trunking mode.
If I send packet from host1 to host2 I want to stop packet on switch1.
Is this scheme OK?
Or how to reorganize configuration (where to place trunk or access mode) If
it isn't correct .



home networking made easy, greater protection, less stress, introducing nm 5.0, 728x90
Posted by BernieM on June 14, 2006, 4:07 pm
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> Hi
>
> I have following netowork:
>
>
> VLAN1 VLAN1 VLAN2 VLAN2 VLAN1 VLAN1
> host1--------------switch1-------------switch2-------------host2
>
> Everything ports are in trunking mode.
> If I send packet from host1 to host2 I want to stop packet on switch1.
> Is this scheme OK?
> Or how to reorganize configuration (where to place trunk or access mode)
> If
> it isn't correct .
>
>

Unless you trunk VLAN 1 between switch1 and switch2 hosts 1 and 2 can't
communicate.

BernieM



Posted by jw on June 14, 2006, 6:59 pm
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Vlan 1 is generally untagged so it should go through, depending on the
switches' OS/mfr

>
>> Hi
>>
>> I have following netowork:
>>
>>
>> VLAN1 VLAN1 VLAN2 VLAN2 VLAN1 VLAN1
>> host1--------------switch1-------------switch2-------------host2
>>
>> Everything ports are in trunking mode.
>> If I send packet from host1 to host2 I want to stop packet on switch1.
>> Is this scheme OK?
>> Or how to reorganize configuration (where to place trunk or access mode)
>> If
>> it isn't correct .
>>
>>
>
> Unless you trunk VLAN 1 between switch1 and switch2 hosts 1 and 2 can't
> communicate.
>
> BernieM
>



Posted by bison on June 14, 2006, 7:05 pm
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> Vlan 1 is generally untagged so it should go through, depending on the
> switches' OS/mfr
>
For example on Cisco Catalyst 2950 how to this work for VLAN1?



Posted by BernieM on June 15, 2006, 4:36 am
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> Vlan 1 is generally untagged so it should go through, depending on the
> switches' OS/mfr
>
>>
>>> Hi
>>>
>>> I have following netowork:
>>>
>>>
>>> VLAN1 VLAN1 VLAN2 VLAN2 VLAN1 VLAN1
>>> host1--------------switch1-------------switch2-------------host2
>>>
>>> Everything ports are in trunking mode.
>>> If I send packet from host1 to host2 I want to stop packet on switch1.
>>> Is this scheme OK?
>>> Or how to reorganize configuration (where to place trunk or access mode)
>>> If
>>> it isn't correct .
>>>
>>>
>>
>> Unless you trunk VLAN 1 between switch1 and switch2 hosts 1 and 2 can't
>> communicate.
>>
>> BernieM
>>
>
>

Oh, ok thanks, wasn't aware of that. So for the requirement to "stop
packets on switch 1" there's going to have to be some form of layer-3
security ie. acl etc.

BernieM



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