Cisco 2950 Gigabit interface trunking

[ciscotech4u]

This is the small part of the network design that i want to seek advice from the forum .

++ we have two cisco 2950 switch

switch1 ==gigabit trunk == switch2 .

we want trunking to enable between these two two switches by using there gigabit ethernet interface ie

switch 1 interface GigabitEthernet0/1 is connected to switch 2 interface GigabitEthernet0/1 and switch 1 interface GigabitEthernet0/2 is connected to switch 2 interface GigabitEthernet0/2.

i need advice in following areas

++ what cable do we need to connect these switches (i guess cross over cable will do )

++ do we have configuration on the tech tip page

for achieving the same ?

[Georg Pauwen]

Hello,

for the trunk connection you need a four twisted-pair crossover cable:

Figure B-11 Four Twisted-Pair Crossover Cable Schematics for 10/100/1000 and 1000BASE-T Ports

http://www.cisco.com/en/US/partner/products/hw/switches/ps628/products_installation_guide_chapter09186a0080346679.html#wp1020386

You can either configure 802.1Q or an ISL trunks between your switches. For 802.1Q the configuration would look like this:

Switch1

!

interface GigabitEthernet0/1

switchport trunk encapuslation dot1q

switchport mode trunk

!

interface GigabitEthernet0/2

switchport trunk encapsulation dot1q

switchport mode trunk

Switch2

!

interface GigabitEthernet0/1

switchport trunk encapuslation dot1q

switchport mode trunk

!

interface GigabitEthernet0/2

switchport trunk encapsulation dot1q

switchport mode trunk

And for ISL encapsulation, the configuration would look like this:

Switch1

!

interface GigabitEthernet0/1

switchport trunk encapuslation isl

switchport mode trunk

!

interface GigabitEthernet0/2

switchport trunk encapsulation isl

switchport mode trunk

Switch2

!

interface GigabitEthernet0/1

switchport trunk encapuslation isl

switchport mode trunk

!

interface GigabitEthernet0/2

switchport trunk encapsulation isl

switchport mode trunk

You could also configure a GigaChannel to bind both interfaces into one logical link, for better throughput. For 802.1Q:

Switch1

!

interface Port-channel1

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface GigabitEthernet0/1

switchport trunk encapuslation dot1q

switchport mode trunk

channel-group 1 mode on

!

interface GigabitEthernet0/2

switchport trunk encapsulation dot1q

switchport mode trunk

channel-group 1 mode on

Switch2

!

interface Port-channel1

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface GigabitEthernet0/1

switchport trunk encapuslation dot1q

switchport mode trunk

channel-group 1 mode on

!

interface GigabitEthernet0/2

switchport trunk encapsulation dot1q

switchport mode trunk

channel-group 1 mode on

And for ISL:

Switch1

!

interface Port-channel1

switchport trunk encapsulation isl

switchport mode trunk

!

interface GigabitEthernet0/1

switchport trunk encapuslation isl

switchport mode trunk

channel-group 1 mode on

!

interface GigabitEthernet0/2

switchport trunk encapsulation isl

switchport mode trunk

channel-group 1 mode on

Switch2

!

interface Port-channel1

switchport trunk encapsulation isl

switchport mode trunk

!

interface GigabitEthernet0/1

switchport trunk encapuslation isl

switchport mode trunk

channel-group 1 mode on

!

interface GigabitEthernet0/2

switchport trunk encapsulation isl

switchport mode trunk

channel-group 1 mode on

HTH,

GP

[ciscotech4u]

Thanks man !! i am preety much set the info that you have given to me -- :)