mikey250
asked on
VLAN NUMBER QUERY
Im aware of the following:
Default vlan ranges:
1 - Cisco
2 - 1001 - Ethernet used for 'Server/Client'
1002 - 1005 - FDDI
1025 - 4094 - Ethernet also but used with 'Transparent mode'
Ive worked for Datacentres and only seen vlan number ranges in the Single or double figures, but either way presumably as per my info above, a vlan can use a high vlan number as high as 1001?
As ive never worked for small companies do they configure their vlans in the ranges of 1025-4096 setup as 'Transparent', as I have only known lower numbers to ever be used?
can someone advise!!
Default vlan ranges:
1 - Cisco
2 - 1001 - Ethernet used for 'Server/Client'
1002 - 1005 - FDDI
1025 - 4094 - Ethernet also but used with 'Transparent mode'
Ive worked for Datacentres and only seen vlan number ranges in the Single or double figures, but either way presumably as per my info above, a vlan can use a high vlan number as high as 1001?
As ive never worked for small companies do they configure their vlans in the ranges of 1025-4096 setup as 'Transparent', as I have only known lower numbers to ever be used?
can someone advise!!
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according to my book, 'Transparent mode' for VTP yes, has cisco default vlans starting from 1025-4094 not 20, 100 or 900 for example although yes Ive used lower than the default, so im wondering what is going on?
it does not mention in my book anything about 10 bit for ISL, as all it shows is:
DA - Destn address
SA - Source address
Ethertype/Length - ty-e
Data - info inside
FCS - Error checking
Where as 802.1Q - shows 12 bits
it does not mention in my book anything about 10 bit for ISL, as all it shows is:
DA - Destn address
SA - Source address
Ethertype/Length - ty-e
Data - info inside
FCS - Error checking
Where as 802.1Q - shows 12 bits
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oK "if all of your trunks are 802.1q AND you're not running VTP, then there wont be any problems with VLAN ID's upto 4094."
Ok but if im using 'MST' which allows vlans to cross trunks for example labelled as one 'Region' then does this mean VTP cannot be used?
im assuming then that only with 'ISL' I can cross trunks with 'MST' then?
Ok but if im using 'MST' which allows vlans to cross trunks for example labelled as one 'Region' then does this mean VTP cannot be used?
im assuming then that only with 'ISL' I can cross trunks with 'MST' then?
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ASKER
I haven't mentioned STP.
ASKER
trying to understand:
oK "if all of your trunks are 802.1q AND you're not running VTP, then there wont be any problems with VLAN ID's upto 4094."?
Ok but if im using 'MST' which allows vlans to cross trunks for example labelled as one 'Region' then does this mean VTP cannot be used?
im assuming then that only with 'ISL' I can cross trunks with 'MST' then?
oK "if all of your trunks are 802.1q AND you're not running VTP, then there wont be any problems with VLAN ID's upto 4094."?
Ok but if im using 'MST' which allows vlans to cross trunks for example labelled as one 'Region' then does this mean VTP cannot be used?
im assuming then that only with 'ISL' I can cross trunks with 'MST' then?
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ok no problem! thanks for useful points of clarification
ASKER
yes but for server/client this is ok!!
what about 'transparent'?
I have set 20 30 or whatever on a 'transparent' before but wanted to know if the default ranges are those I mentioned why can or should i use lower?
useless information i realise, just would like to know!!