Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Cascading 2 cisco 2960 switch

Dear All,

I want to cascade two 2960 switch (Layer2) together, i have tried by making the ports trunk as well as access but it doesnt works, please help?

Regards

Jahanzeb Feroze

20 REPLIES
New Member

Dear Jahanzeb

Dear Jahanzeb

Please check the link below

http://www.tek-tips.com/viewthread.cfm?qid=1583402

New Member

Thanks for sharing the link,

Thanks for sharing the link, but question asked in that link is still unanswered, no solution has been determined yet.

Super Bronze

Could you expand on "doesnt

Could you expand on "doesnt works" in your OP?

And, as Jose already asked, could your provide configs and what ports you're actually interconnecting?

New Member

One port is of Gig, while

One port is of Gig, while other port is of Fa

Super Bronze

Copper?

Copper?

New Member

not copper, its ethernet

not copper, its ethernet cable

Super Bronze

Ethernet can run across both

Ethernet can run across both copper or fiber - so what "kind" of Ethernet?

New Member

Fiber

Fiber

If you are running fiber,

If you are running fiber, what are the SFPs you are using please do a "show inventory" Usually fiber SFPs are either 100Mps or 1Gbps, if only going to a 100Mbps device then ensure the SFP in the Gigabit port will run at 100Mbps 

Hi Jahanzeb,

Hi Jahanzeb,

- Did you set a native vlan?

// switchport trunk native vlan <Vlan-id>

Example:

interface GigabitEthernet<int>
 switchport mode trunk
 switchport trunk encapsulation dot1q
 switchport trunk native vlan <Vlan-id>
 no sh

Regards.

New Member

Nopes i didnt, is that really

Nopes i didnt, is that really matter to set the native vlan ?

VIP Purple

The native VLAN will default

The native VLAN will default to 1.  You don't need to configure it on either end, but if you configure it on one end you need to configure it on both ends.

Can you post the 2 config? 

Can you post the 2 config? 

New Member

On first Switch,

On first Switch,

interface GigabitEthernet<int>
 switchport mode trunk

 switchport trunk allowed vlan <Vlan-id>
 
 

On other Switch,

interface Fa<int>
 switchport mode trunk

 switchport trunk allowed vlan <Vlan-id>
 

These are the simple config on both switches

VIP Purple

Have you created the VLANs

Have you created the VLANs being trunked on both switches, or just one of them?

Trunking a VLAN between switches is not sufficient to make it work.  You actually have to create the VLAN on both switches.

VIP Purple

Are the switches within 3m of

Are the switches within 3m of each other, and are they 2960-X's ?  If so, a nicer solution is to buy the stacking modules and make them look like one larger switch.

New Member

yes they are with in 3m,

yes they are with in 3m, cannot buy stacking modules, has to go with the same equipment which are already exists, one is 2960 while other is 2960 X

New Member

Hi Jahanzeb,

Hi Jahanzeb,

Here is a sample configuration for basic 2-switch connection.

PC1---(G0/2) 2960SW1 (G0/1)----------utp---------(G0/1) 2960SW2 (G0/2)---PC2

2960SW1:

configure terminal

vlan 10,20,30

interface G0/1

 switchport mode trunk

interface G0/2

 switchport mode access

 switchport access vlan X

end

2960SW2:

configure terminal

vlan 10,20,30

interface G0/1

 switchport mode trunk

interface G0/2

 switchport mode access

 switchport access vlan X

end

Verification:

show interface G0/1 (must be status up line protocol up)

show interface G0/2 (must be status up line protocol up)

show spanning-tree interface G0/1 (VLANs mustbe in FWD state)

show spanning-tree interface G0/2 (VLANs mustbe in FWD state)

show interface trunk

(Please post results here if still not working)

Please rate correct if this answered your problem.

Regards,

Son

CCIE (R&S) #27666 CCSI HP MASE
New Member

PC1---(G0/2) 2960SW1 (G0/1)--

PC1---(G0/2) 2960SW1 (G0/1)----------utp---------(G0/1) 2960SW2 (G0/2)---PC2

Above scenario works perfectly fine, and i am able to ping both PCs, but i have to create the following scenario with No PC attached,

 2960SW1 (G0/1)----------utp---------(G0/1) 2960SW2

Had tried configuring both ports as trunk, but it didnt work, couldnt able to cascade.

New Member

If you are not using PCs,

If you are not using PCs, then how are you testing the connections? Are these physical problem (show ip int brief shows status down, line protocol down)?

CCIE (R&S) #27666 CCSI HP MASE
382
Views
0
Helpful
20
Replies