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Basic Question: Switchport Mode or Access ?? 1
- Thread starter bran2235
- Start date
- Thread starter
- #2
chieftan999
MIS
Switchport mode - only allows 1 vlan - no tagging
switchport mode access
switchport access vlan 100
Trunking (802.1q) - allows multiple VLANs through 1 port - tagged VLANs - utilises Ingress and Egress and PVIDs.
switchport mode trunk (may require 802.1q as well)
switchport trunk allowed vlan (VLANs required)
Also a good idea to set a native VLAN on a trunked link.
Reamin positive. The affect on those around you will amaze.
switchport mode access
switchport access vlan 100
Trunking (802.1q) - allows multiple VLANs through 1 port - tagged VLANs - utilises Ingress and Egress and PVIDs.
switchport mode trunk (may require 802.1q as well)
switchport trunk allowed vlan (VLANs required)
Also a good idea to set a native VLAN on a trunked link.
Reamin positive. The affect on those around you will amaze.
- Thread starter
- #4
Hi, I'm a Newbie Please Help.
After setting up a Cisco 3550-48 Switch, I get the following:
"Vlan1 is up, line protocol is down
Internet address is 10.156.138.16/25"
also, what does:
"interface FastEthernet0/1 switchport mode dynamic desirable" mean?
Here are the relevant setting from my config:
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname WET-3548-1
!
enable secret
enable password
!
ip subnet-zero
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
!
!
!
interface FastEthernet0/1
switchport mode dynamic desirable
!
interface FastEthernet0/2
switchport mode dynamic desirable
!
!
!
!
!
!
!
interface FastEthernet0/48
switchport mode dynamic desirable
!
interface GigabitEthernet0/1
no switchport
no ip address
!
interface GigabitEthernet0/2
switchport mode dynamic desirable
!
interface Vlan1
ip address 10.156.138.16 255.255.255.128
no ip route-cache
!
ip classless
ip http server
!
!
line con 0
line vty 0 4
password
login
line vty 5 15
password
Login
!
!
end
After setting up a Cisco 3550-48 Switch, I get the following:
"Vlan1 is up, line protocol is down
Internet address is 10.156.138.16/25"
also, what does:
"interface FastEthernet0/1 switchport mode dynamic desirable" mean?
Here are the relevant setting from my config:
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname WET-3548-1
!
enable secret
enable password
!
ip subnet-zero
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
!
!
!
interface FastEthernet0/1
switchport mode dynamic desirable
!
interface FastEthernet0/2
switchport mode dynamic desirable
!
!
!
!
!
!
!
interface FastEthernet0/48
switchport mode dynamic desirable
!
interface GigabitEthernet0/1
no switchport
no ip address
!
interface GigabitEthernet0/2
switchport mode dynamic desirable
!
interface Vlan1
ip address 10.156.138.16 255.255.255.128
no ip route-cache
!
ip classless
ip http server
!
!
line con 0
line vty 0 4
password
login
line vty 5 15
password
Login
!
!
end
-
1
- #6
switchport mode
To set the interface type, use the switchport mode command. To reset the mode to the appropriate default mode for the device, use the no form of this command.
switchport mode {access | dot1q-tunnel | trunk | dynamic {auto | desirable}}
switchport mode private-vlan {host | promiscuous | trunk}
no switchport mode dot1q-tunnel
no switchport mode private-vlan
Syntax Description
access
Specifies a nontrunking, nontagged single VLAN Layer 2 interface.
dot1q-tunnel
Specifies an 802.1Q tunnel port.
trunk
Specifies a trunking VLAN Layer 2 interface.
dynamic auto
Specifies that the interface convert the link to a trunk link.
dynamic desirable
Specifies that the interface actively attempt to convert the link to a trunk link.
private-vlan host
Specifies that the ports with a valid PVLAN trunk association become active host private VLAN trunk ports.
private-vlan promiscuous
Specifies that the ports with a valid PVLAN mapping become active promiscuous ports.
private-vlan trunk
Specifies that the ports with a valid PVLAN trunk association become active host private VLAN trunk ports.
To set the interface type, use the switchport mode command. To reset the mode to the appropriate default mode for the device, use the no form of this command.
switchport mode {access | dot1q-tunnel | trunk | dynamic {auto | desirable}}
switchport mode private-vlan {host | promiscuous | trunk}
no switchport mode dot1q-tunnel
no switchport mode private-vlan
Syntax Description
access
Specifies a nontrunking, nontagged single VLAN Layer 2 interface.
dot1q-tunnel
Specifies an 802.1Q tunnel port.
trunk
Specifies a trunking VLAN Layer 2 interface.
dynamic auto
Specifies that the interface convert the link to a trunk link.
dynamic desirable
Specifies that the interface actively attempt to convert the link to a trunk link.
private-vlan host
Specifies that the ports with a valid PVLAN trunk association become active host private VLAN trunk ports.
private-vlan promiscuous
Specifies that the ports with a valid PVLAN mapping become active promiscuous ports.
private-vlan trunk
Specifies that the ports with a valid PVLAN trunk association become active host private VLAN trunk ports.
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