Trunk Command Not Working in Cisco Packet Tracer

[ksamujtaba]

Hi,

In cisco packet tracer i was practing inter vlan routing, i got an issue about trunkport command not working.

For Example:

I have 2PC's with PC1(Vlan10) and PC2(Vlan20) both ports(f0/2 & f0/3) configured with vlan's, but when i am configuring f0/1 to trunk port for router port(Gig0/0), it's not showing the table of trunk port.

Conf t

int f0/1

switchport mode trunk

exit

Switch#sh int tr (after this command port stillin down state and trunk port table doesn't appear below).

please suggest me about this issue, i was struk here since 3days.

Thank You & Regards,

[Martin L]

1st interface is in red , so it is probably shutdown; 2nd Router needs some configuration; For inter vlan routing with router u must use ROAS, router-on-as-stick. U need something like this

interface GigabitEthernet0/0.10

encapsulation dot1Q 10

ip address x.y.z

interface GigabitEthernet0/0.20

encapsulation dot1Q 20

ip address x.x.x.x

Regards, ML
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[ksamujtaba]

HI Martin,

Thank You for your reply, still after configuring still interface between switch and router is in red, i need all configuration on router and on switch as int f0/1 is trunk.

In switch when i need to check switch#sh int tr command below details not appear it is empty.

So please can you suggest.

Thank You,

[balaji.bandi]

Just quick question, when you enter that command in the switch is that give any error ?

like below :

(config-if)#switchport mode trunk
Command rejected: An interface whose trunk encapsulation is "Auto" can not be configured to "trunk" mode.

may be try below example :

interface FastEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk