trunk config between two 6500 cat switches

[samirshaikh52]

Hi All,

What is the recommended trunk configuration between 2 cisco 6500 switches including hsrp scenario.

Thanks

[Leo Laohoo]

Comparing Layer 2 Operations in CatOS and Cisco IOS System Software on the Catalyst 6500/6000

http://www.cisco.com/en/US/customer/products/hw/switches/ps700/products_tech_note09186a008010e9d5.shtml#nativeios

[Ian Jay]

Hi Samir,

In almost all scenarios, its recommended to have 'dot1q' encapsulation and a static trunk config 'switchport mode trunk'. Matching the native VLAN on both sides is required and will be VLAN1 by default.

When configuring trunks, you should be mindful of VTP, trunk and STP states. Reviewing the following for mismatches between your Cat6K will help:

- show vtp status

- show interfaces trunk

- show spanning-tree

In terms of HSRP, it is also recommended to run HSRP active in the same location as STP Root to avoid any asynchronous routing problems.

/ijay