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2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.02-1
Medium-Sized Switched Network Construction
Imlementing!"ANs #nd $r%n&s
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2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.02-2
Issues in a Poorly Designed Network
'n(o%nded )#il%re dom#ins
"#rge (ro#dc#st dom#ins
"#rge #mo%nt o) %n&no*n+AC %nic#st tr#))ic
'n(o%nded m%ltic#st tr#))ic
+#n#gement #nds%ort ch#llenges
ossi(le sec%rityv%lner#(ilities
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2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.02-
VLAN !er!iew
!"AN /ro#dc#st Dom#in "ogic#l Net*or& S%(net
Segment#tion
le3i(ility
Sec%rity
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2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.02-4
Designing VLANs "or an rganization
!"AN design m%st t#&e into consider#tion the imlement#tiono)
# hier#rchic#l net*or& #ddressing scheme.
$he (ene)its o) hier#rchic#l #ddressing #re5
6#se o) m#n#gement #nd tro%(leshooting
6 +inimi8#tion o) errors
6 9ed%ced n%m(er o) ro%ting t#(le entries
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2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.02-:
#uidelines "or A$$lying IPAddress S$ace
Alloc#te one I s%(net er !"AN.
Alloc#te I #ddress s#ces in contig%o%s (loc&s.
Layer %Layer %
Layer %
!$1 !$2 !$
Layer &
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2007 Cisco Systems, Inc. All rights reserved. ICND2 v1.02-;
Network 'ra""ic 'y$es
$r#))ic tyes to consider*hen design#ting !"ANs5
Net*or& m#n#gement
I telehony
I +%ltic#st Norm#l d#t#
Sc#venger cl#ss
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7/32 2007 Cisco Systems, Inc. All rights reserved. ICND2
v1.02-7
Ad!antages o" Voice VLANs
hones segmented inse#r#te logic#l net*or&s
rivides net*or&segment#tion#nd control
Allo*s #dministr#tors
to cre#te #nden)orce >oS
"ets #dministr#tors#dd #nd en)orcesec%rity olicies
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v1.02-?
VLAN $eration
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v1.02-@
VLAN Mem(ershi$ Modes
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v1.02-10
)*%+, 'runking
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v1.02-11
)*%+, .rame
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v1.02-12
/nderstanding Nati!e VLANs
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v1.02-1
V'P .eatures
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v1.02-14
C#nnot cre#te,ch#nge, or delete!"ANs
Sends #nd)or*#rds#dvertisements
Synchroni8es
Cre#te !"ANs
+odi)y !"ANs Delete !"ANs
Sends #nd )or*#rds#dvertisements
Synchroni8es
Cre#te loc#l !"ANs only
+odi)y loc#l !"ANs only
Delete loc#l !"ANs only
or*#rds #dvertisements
Does notsynchroni8e
V'P Modes
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v1.02-1:
V'P $eration
!$ #dvertisements #re sent #s m%ltic#st )r#mes.
!$ servers #nd clients #re synchroni8ed to thel#test revision
n%m(er.
!$ #dvertisements #re sent every : min%tes or*hen there is #
ch#nge.
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v1.02-1;
V'P Pruning
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17/32 2007 Cisco Systems, Inc. All rights reserved. ICND2
v1.02-17
Con"iguring VLANs and 'runks
1. Con)ig%re #nd veri)y !$.
2. Con)ig%re #nd veri)y ?02.1> tr%n&s.
. Cre#te or modi)y # !"AN on the !$ server s*itch.
4. Assign s*itch orts to # !"AN #nd veri)y.:. 3ec%te #dds,
moves, #nd ch#nges.
;. S#ve the !"AN con)ig%r#tion.
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v1.02-1?
!$ de)#%lts )or the Cisco C#t#lyst s*itch5
6 !$ dom#in n#me5 None
6 !$ mode5 Server mode
6 !$ r%ning5 n#(led or dis#(led model seci)ic
6 !$ #ss*ord5 N%ll
6 !$ version5 !ersion 1
A ne* s*itch c#n #%tom#tic#lly (ecome #rt o) # dom#in once it
receives #n#dvertisement )rom # server.
A !$ client c#n over*rite # !$ server d#t#(#se i) the client h#s
# higher revisionn%m(er.
A dom#in n#me c#nnot (e removed #)ter it is #ssigned it c#n only
(e re#ssigned.
V'P Con"iguration #uidelines
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v1.02-1@
SwitchX# configure terminal
SwitchX(config)# vtp mode [ server | client | transparent ]
SwitchX(config)# vtp domain domain-nameSwitchX(config)# vtp
passwordpassword
SwitchX(config)# vtp pruning
SwitchX(config)# end
Creating a V'P Domain
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v1.02-20
SwitchX(config)# vtp domain ICNChanging !" domain name to
ICNSwitchX(config)# vtp mode transparentSetting device to !"
"$%NS%$&N" mode'SwitchX(config)# end
SwitchX# show vtp status!" !ersion Configuration $evision
*+a,imum !-%Ns supported locall. /0Num1er of e,isting !-%Ns 23!"
4perating +ode "ransparent!" omain Name ICN!" runing +ode
isa1led
!" ! +ode isa1led!" "raps 5eneration isa1led+6 digest *,3
*,/& *,6& *,7 *,%8 *,%* *,8 *,%%Configuration last modified
1. 2*'2'2'0 at 7979:7 **;*6SwitchX#
V'P Con"iguration and Veri"ication01am$le
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v1.02-21
)*%+, 'runking Issues
+#&e s%re th#t the n#tive!"AN )or #n ?02.1> tr%n&is
the s#me on (oth endso) the tr%n& lin&.
Note th#t n#tive !"AN)r#mes #re %nt#gged.
A tr%n& ort c#nnot (e #sec%re ort.
All ?02.1> tr%n&ing ortsin #n therCh#nnel gro%m%st h#ve
the s#mecon)ig%r#tion.
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v1.02-22
Con"iguring )*%+, 'runking
Con)ig%res the ort #s # !"AN tr%n&
SwitchX(config9if)#
switchport mode trun | trun
SwitchX(config9if)#
Con)ig%res the tr%n&ing ch#r#cteristics o) the ort
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v1.02-2
SwitchX# show interfaces fa*?22 trun
