sh vlan id...

i highly recommend paul browning's book, switch simplified...  i do not recommend, however, it's delivery method... there's something about cracking a real book open that gives me pleasure...  reading on the pc has never been a favorite of mine but i find i am increasingly doing it... also, reading on the pc i find more tiring...

this book is only avaiable with a kindle delivery... so i have to borrow my girlfriend's ipad in order to read it... that irritates me... if i must read on the pc, i prefer a local pdf; feels more like a book that way... chris bryant's ccnp ebook delivery is another irritation (but also worth the trouble);  with bryant's stuff you have to download the book with an application, access it through the application, and you are basically reading on line... not a fan of that either, but i prefer that to the kindle bullshit...

i understand the need to protect their stuff, but at what cost to the end user; decided irritation... 

so in browning's book i bump into a command that i never use, and because i never use it, i'm going to foist it upon you...

it is sh vlan id x

i use sh vlan brie almost to exclusion...

sh vlan id x gives you more specific information about the vlan...
great...

dls1(config)#vlan 200                                                          
dls1(config-vlan)#mtu 1522                                                     
dls1(config-vlan)#end                                                          
dls1#sh vlan id 200                                                            
                                                                               
VLAN Name                             Status    Ports                          
---- -------------------------------- --------- -------------------------------
200  VLAN0200                         active    Fa0/7, Fa0/8, Fa0/9, Fa0/10    
                                                Fa0/11, Fa0/12                 
                                                                               
VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2 
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------ 
200  enet  100200     1522  -      -      -        -    -        0      0      
                                                                  
notice i changed the vlan mtu... i can't think of a reason to ever do this...  like stp; why would you ever screw with the timers? dont do it...

dls1#sh vlan id 1                                                              
                                                                               
VLAN Name                             Status    Ports                          
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa0/1, Fa0/2, Fa0/3, Fa0/4     
                                                Fa0/5, Fa0/6, Fa0/7, Fa0/8     
                                                Fa0/9, Fa0/10, Fa0/11, Fa0/12  
                                                Fa0/13, Fa0/14, Fa0/15, Fa0/16 
                                                Fa0/17, Fa0/18, Fa0/19, Fa0/20 
                                                Fa0/21, Fa0/22, Gi0/1, Gi0/2   
                                                                               
VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2 
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------ 
1    enet  100001     1500  -      -      -        -    -        0      0 

of course the default is 1500...  leave it alone for God's sake...

this is all the shit you can change for your newly created vlan:

dls1(config-vlan)#?                                                            
VLAN configuration commands:                                                   
  are          Maximum number of All Route Explorer hops for this VLAN (or zero
               if none specified)                                              
  backupcrf    Backup CRF mode of the VLAN                                     
  bridge       Bridging characteristics of the VLAN                            
  exit         Apply changes, bump revision number, and exit mode              
  media        Media type of the VLAN                                          
  mtu          VLAN Maximum Transmission Unit                                  
  name         Ascii name of the VLAN                                          
  no           Negate a command or set its defaults                            
  parent       ID number of the Parent VLAN of FDDI or Token Ring type VLANs   
  remote-span  Configure as Remote SPAN VLAN                                   
  ring         Ring number of FDDI or Token Ring type VLANs                    
  said         IEEE 802.10 SAID                                                
  shutdown     Shutdown VLAN switching                                         
  state        Operational state of the VLAN                                   
  ste          Maximum number of Spanning Tree Explorer hops for this VLAN (or 
               zero if none specified)                                         
  stp          Spanning tree characteristics of the VLAN                       
  tb-vlan1     ID number of the first translational VLAN for this VLAN (or zero
               if none)                                                        
  tb-vlan2     ID number of the second translational VLAN for this VLAN (or    
               zero if none)                            

Good lord...

vlan number is the only requirement to create a vlan... name and port membership are vital, but not required... everything else, well, you decide...