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VLANs

Picture
VLANs are used to separate different broadcast domains. For every VLAN created, another broadcast domain is also created. The VLAN is created globally and applied to the interface. Once the interface has been placed into the VLAN, it becomes a member of that broadcast domain, where it can begin sending and receiving traffic.

Create VLANs 41, 42, 46, 49, 413, 414, 422 and 423 on SW4.
Create VLANs 31, 32, 36, 39, 313, 314, 322 and 323 on SW3.

SW4(config)#vlan 41,42,46,49,413,414,422,423
SW3(config)#vlan 31,32,36,39,313,314,322,323

SW4#show vlan br

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi0/0, Gi0/1, Gi0/2, Gi0/3
                                                Gi1/0, Gi1/1, Gi1/2, Gi1/3
                                                Gi2/0, Gi2/1, Gi2/2, Gi2/3
41   VLAN0041                         active
42   VLAN0042                         active
46   VLAN0046                         active
49   VLAN0049                         active
413  VLAN0413                         active
414  VLAN0414                         active
422  VLAN0422                         active
423  VLAN0423                         active

SW3#show vlan brief

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi0/0, Gi0/1, Gi0/2, Gi0/3
                                                Gi1/0, Gi1/1, Gi1/2, Gi1/3
                                                Gi2/0, Gi2/1, Gi2/2, Gi2/3
31   VLAN0031                         active
32   VLAN0032                         active
36   VLAN0036                         active
39   VLAN0039                         active
313  VLAN0313                         active
314  VLAN0314                         active
322  VLAN0322                         active
323  VLAN0323                         active

On SW4, place the following ports into the following VLANs. These ports should be setup to support only a single host and transition immediately to STP forwarding upon link up.
  • G0/0 - VLAN 49
  • G0/1 - VLAN 46
  • G0/2 - VLAN 42
  • G0/3 - VLAN 41
  • G1/0 - VLAN 414
  • G1/1 - VLAN 413
  • G1/2 - VLAN 423
  • G1/3 - VLAN 422

On SW3, place the following ports into the following VLANs. These ports should be setup to support only a single host and transition immediately to STP forwarding upon link up.
  • G0/0 - VLAN 39
  • G0/1 - VLAN 36
  • G0/2 - VLAN 32
  • G0/3 - VLAN 31
  • G1/0 - VLAN 314
  • G1/1 - VLAN 313
  • G1/2 - VLAN 423
  • G1/3 - VLAN 322

SW4
interface GigabitEthernet0/0
 switchport access vlan 49
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet0/1
 switchport access vlan 46
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet0/2
 switchport access vlan 42
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet0/3
 switchport access vlan 41
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet1/0
 switchport access vlan 414
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet1/1
 switchport access vlan 413
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet1/2
 switchport access vlan 423
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet1/3
 switchport access vlan 422
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge

SW3
interface GigabitEthernet0/0
 switchport access vlan 39
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet0/1
 switchport access vlan 36
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet0/2
 switchport access vlan 32
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet0/3
 switchport access vlan 31
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet1/0
 switchport access vlan 314
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet1/1
 switchport access vlan 313
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet1/2
 switchport access vlan 323
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge
!
interface GigabitEthernet1/3
 switchport access vlan 322
 switchport mode access
 media-type rj45
 negotiation auto
 spanning-tree portfast edge

SW4#show vlan brief

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi2/0, Gi2/1, Gi2/2, Gi2/3
41   VLAN0041                         active    Gi0/3
42   VLAN0042                         active    Gi0/2
46   VLAN0046                         active    Gi0/1
49   VLAN0049                         active    Gi0/0
413  VLAN0413                         active    Gi1/1
414  VLAN0414                         active    Gi1/0
422  VLAN0422                         active    Gi1/3
423  VLAN0423                         active    Gi1/2

SW3#show vlan brief

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi2/0, Gi2/1, Gi2/2, Gi2/3
31   VLAN0031                         active    Gi0/3
32   VLAN0032                         active    Gi0/2
36   VLAN0036                         active    Gi0/1
39   VLAN0039                         active    Gi0/0
313  VLAN0313                         active    Gi1/1
314  VLAN0314                         active    Gi1/0
322  VLAN0322                         active    Gi1/3
323  VLAN0323                         active    Gi1/2

With the VLANs created and placed into ports, we'll be able to send and receive traffic once we complete a couple more steps, trunking and some IP addressing.
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  • Home
  • Technology VoD!
    • Cisco >
      • Route & Switch / Enterprise Infrastructure
  • Technology Breakdowns!
    • Route&Switch/Ent. Infra. >
      • L2 Technologies
      • L3 Technologies
      • VPN Technologies
      • Services >
        • IOS - Dynamic NAT
        • HSRP - IPv4 Setup
        • HSRP - Priority and Preemption
    • Service Provider >
      • IGPs (Interior Gateway Protocols)
      • First Hop Redundancy >
        • HSRP (Hot Standby Router Protocol) >
          • HSRP - IOS/IOS XE Setup
          • HSRP - IOS XR Setup
      • BGP (Border Gateway Protocol)
      • Inter AS Multicast (MSDP)
      • Intra-AS MPLS
      • Inter-AS MPLS
    • Security >
      • IOS Firewall
      • ASA Firewall
      • FirePOWER Threat Defense >
        • FTD - FTD NGFW Device Setup and FMC Integration
      • VPNs >
        • PKI
        • Site to Site VPNs
        • Remote Access VPNs >
          • IOS Remote Access
          • ASA Remote Access
    • Data Center >
      • Nexus 9000v >
        • Nexus 9000v - Enabling Features
        • Nexus 9000v - VLANs and Trunks
        • Nexus 9000v - LACP Port Channels
        • Nexus 9000v - vPC (Virtual Port Channel)
        • Nexus 9000v - OSPFv2
        • Nexus 9000v - VXLAN - Ingress Replication Flood and Learn
        • Nexus 9000v - IP Multicast
        • Nexus 9000v - VxLAN - Multicast Flood and Learn
        • Nexus 9000v - VxLAN - BGP EVPN with Multicast
        • Nexus 9000v - VxLAN - BGP EVPN w/Ingress Replication
        • Nexus 9000v - VxLAN - Inter-VxLAN Routing with BGP EVPN
        • Nexus 9000v - VXLAN - External Routing
      • Nexus 7000v
    • Palo Alto