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network cisco ccna gns3 certification arteq

network cisco ccna gns3 certification arteq
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Saturday, April 14, 2012

allowed vlan, except...

use this wisely...  trunks pass all vlan traffic by default... and that is good...

dls1(config-if)#sw trunk ?                                                     
  allowed        Set allowed VLAN characteristics when interface is in trunking
                 mode                                                          
  encapsulation  Set trunking encapsulation when interface is in trunking mode 
  native         Set trunking native characteristics when interface is in      
                 trunking mode                                                 
  pruning        Set pruning VLAN characteristics when interface is in trunking
                 mode                                                          
                                                                               
dls1(config-if)#sw trunk allowed vlan except ?                                 
  WORD  VLAN IDs of disallowed VLANS when this port is in trunking mode        
                                                                               
dls1(config-if)#sw trunk allowed vlan except

can't say it better than the above output...

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