Trunking issue

[rohitraizaday]

Issue between two switches.

Switch1 is uplink switch (WS-C3524-XL),FastEthernet0/24 in vlan 1 by default, is connected to Switch2(WS-C2960-48TT-L) to Gi0/1.

When i put Gi0/1 in

interface GigabitEthernet0/1

switchport mode trunk

speed 100

end

it does not make any change , but when i put Switch1 port f0/24 into

switch port mode trunk i lost the connectivity.

i suspect issue in switch2 g0/1 port because when it is configured for trunk or in vlan1 i do not see any change.

vlan1 is management vlan .

pls suggest !!!

[Thotsaphon Lueangwattanaphong]

rohit,

Can you post the errors you mentioned?

Are all interfaces up?

please post a "show int status o" command n both interfaces?

Hopes you are testing connections from the vlan1. If not, Have all switches been added the vlans?

HTH

Thot

[rohitraizaday]

Both switch have same vlan database, issue is all the vlan are not communicating except vlan1.

[Thotsaphon Lueangwattanaphong]

Rohit,

I should use either "dot1q" or "ISL" on both switches. Seems you are using Vlan1 as a native vlan. So dot1q will let vlan1 go without tagging but ISL does. Let's check WS-C3524-XL.

please do "sh inter trunk" command.That will explore what is happening.

HTH

Thot

[rohitraizaday]

Thanks for you help, but issue has been fixed.

uplink switch port was not supporting truck.

After changing port it start working.