jskfan
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Trunk and Access Link between Switches
As shown on the topology below, I have 2 Cisco Switches linked together.
I have R3 and R4 configured as hosts with No IP Routing command.
I can ping from R3 to R4 and back.
Initially I thought a link between 2 switches is always a Trunk, but I do not see a Trunk formed between Switch1 and Switch2:
I have R3 and R4 configured as hosts with No IP Routing command.
I can ping from R3 to R4 and back.
Initially I thought a link between 2 switches is always a Trunk, but I do not see a Trunk formed between Switch1 and Switch2:
Switch1#sh interfaces fastEthernet 1/1 trunk
Port Mode Encapsulation Status Native vlan
Fa1/1 off 802.1q not-trunking 1
Port Vlans allowed on trunk
Fa1/1 1
Port Vlans allowed and active in management domain
Fa1/1 1
Port Vlans in spanning tree forwarding state and not pruned
Fa1/1 1
Switch1#
Switch2#show interfaces fastEthernet 1/0 trunk
Port Mode Encapsulation Status Native vlan
Fa1/0 off 802.1q not-trunking 1
Port Vlans allowed on trunk
Fa1/0 1
Port Vlans allowed and active in management domain
Fa1/0 1
Port Vlans in spanning tree forwarding state and not pruned
Fa1/0 1
Switch2#
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Switch1(config-if)#switchp ort mode ?
access Set trunking mode to ACCESS unconditionally
trunk Set trunking mode to TRUNK unconditionally
I believe the Switch simulator on GNS3 does not have the mode dynamic desirable for an interface..
Regarding Packet Tracer 6.1.1, it has this command:
Switch(config-if)#switchpo rt mode dynamic ?
auto Set trunking mode dynamic negotiation parameter to AUTO
desirable Set trunking mode dynamic negotiation parameter to DESIRABLE
but Packet Tracer lacks other commands that the simulated Switch on GNS3 has.
access Set trunking mode to ACCESS unconditionally
trunk Set trunking mode to TRUNK unconditionally
I believe the Switch simulator on GNS3 does not have the mode dynamic desirable for an interface..
Regarding Packet Tracer 6.1.1, it has this command:
Switch(config-if)#switchpo
auto Set trunking mode dynamic negotiation parameter to AUTO
desirable Set trunking mode dynamic negotiation parameter to DESIRABLE
but Packet Tracer lacks other commands that the simulated Switch on GNS3 has.
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Thank you Guys!!
ASKER
So when I linked the switches , will their ports be Access ports but in the same Vlan 1 ?
I can ping between R3 and R4 and back, so thy got to be in the same Vlan:
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