Configuring Vlan Trunks

C H A P T E R 4

•Finding Feature Information, page 61

•Prerequisites for VLAN Trunks, page 61

•Restrictions for VLAN Trunks, page 62

•Information About VLAN Trunks, page 62

•How to Configure VLAN Trunks, page 67

•Configuration Examples for VLAN Trunking, page 80

•Where to Go Next, page 81

•Additional References, page 81

•Feature History and Information for VLAN Trunks, page 82

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Prerequisites for VLAN Trunks

The IEEE 802.1Q trunks impose these limitations on the trunking strategy for a network:

•In a network of Cisco switches connected through IEEE 802.1Q trunks, the switches maintain one spanning-tree instance for each VLAN allowed on the trunks. Non-Cisco devices might support one spanning-tree instance for all VLANs.

When you connect a Cisco switch to a non-Cisco device through an IEEE 802.1Q trunk, the Cisco switch combines the spanning-tree instance of the VLAN of the trunk with the spanning-tree instance of the non-Cisco IEEE 802.1Q switch. However, spanning-tree information for each VLAN is maintained by

Catalyst 2960-XR Switch VLAN Configuration Guide, Cisco IOS Release 15.0(2)EX1

OL-29440-01

WSC2960XR48FPSI specifications

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Cisco Systems WSC2960XR48FPSI manual Configuring Vlan Trunks, Prerequisites for Vlan Trunks

Models: WSC2960XR48FPSI