Isl Trunk Over Etherchannel Link Example - Cisco WS-C6506 Software Manual

Chapter 5 Configuring Ethernet VLAN Trunks
Check the configuration by entering the show trunk command. The Status field in the screen output
Step 2
indicates that port 1/1 is trunking.
Switch1> (enable) show trunk 1/1
Port
--------
1/1
Port
--------
1/1
Port
--------
1/1
Port
--------
1/1
Switch1> (enable)
Define the allowed VLAN list for the trunk by entering the clear trunk command to remove the VLANs
Step 3
that should not pass traffic over the trunk link.
Switch1> (enable) clear trunk 1/1 2-519
Removing Vlan(s) 2-519 from allowed list.
Port 1/1 allowed vlans modified to 1,520-1005.
Switch1> (enable) clear trunk 1/1 531-1005
Removing Vlan(s) 531-1005 from allowed list.
Port 1/1 allowed vlans modified to 1,520-530.
Switch1> (enable) show trunk 1/1
Port
--------
1/1
Port
--------
1/1
Port
--------
1/1
Port
--------
1/1
Switch1> (enable)
Verify connectivity across the trunk by entering the ping command.
Step 4
Switch1> (enable) ping switch2
switch2 is alive
Switch1> (enable)

ISL Trunk Over EtherChannel Link Example

This example shows how to configure an ISL trunk over an EtherChannel link between two switches.
Figure 5-1
OL-8978-04
Mode Encapsulation
----------- -------------
desirable isl
Vlans allowed on trunk
---------------------------------------------------------------------
1-1005, 1025-4094
Vlans allowed and active in management domain
---------------------------------------------------------------------
1,521-524
Vlans in spanning tree forwarding state and not pruned
---------------------------------------------------------------------
Mode Encapsulation
----------- -------------
desirable isl
Vlans allowed on trunk
---------------------------------------------------------------------
1,520-530
Vlans allowed and active in management domain
---------------------------------------------------------------------
1,521-524
Vlans in spanning tree forwarding state and not pruned
---------------------------------------------------------------------
1,521-524
shows two switches that are connected through two 100BASE-TX Fast Ethernet ports.
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
Status Native vlan
------------ -----------
trunking 1
Status Native vlan
------------ -----------
trunking 1
Example VLAN Trunk Configurations
5-15