Port Trunking

Distributed Trunking

Configuring Distributed TrunkingISC Port Configuration

You must configure the ISC ports before you can configure the trunks for distributed trunking. To configure an ISC port, enter this command:

Syntax: switch-interconnect <port-num trk1...trkN> no switch-interconnect

Configures an InterSwitch-Connection (ISC) port. The <port-num trk1...trkN> variable is the interconnect inter­ face that connects two distributed trunking switches. It can be a physical port, manual LACP trunk, or manual non- protocol trunk. You can override an ISC configuration by configuring the command with a different value.

The no form of the command removes the ISC interface configuration.

Note: A port that is already part of a trunk can’t be config­ ured as an ISC interface.

Distributed Trunking Port ConfigurationDistributed trunking ports must be configured manually.To configure distributed trunking on the switch, enter this command:

Syntax: trunk <port-list> <trk1 trk2 ... trkN> [trunk lacp dt-lacp] no trunk <port-list>

Configures distributed trunking on a switch. Use the dt-lacpoption. The trunk groups must be identical in both switches, for example, if Switch Local is configured with trk1and uses the dt-lacpoption, Switch Remote must be configured with trk1 and use the dt-lacpoption also in order to form a Distributed Trunk.

The no form of the command removes the distributed trunk­ ing configuration on the switch.

The example in figure 12-15shows an ISC port being configured for the Local switch and the Remote switch.

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