Configuring An Isl/802.1Q Negotiating Trunk Port; Defining The Allowed Vlans On A Trunk - Cisco WS-X6066-SLB-APC - Content Switching Module Software Manual

Chapter 5 Configuring Ethernet VLAN Trunks
Port
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Port
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Console> (enable)

Configuring an ISL/802.1Q Negotiating Trunk Port

To configure a trunk port to negotiate the trunk encapsulation type (either ISL or 802.1Q), perform this
task in privileged mode:
Task
Step 1
Configure a port to negotiate the trunk
encapsulation type.
Step 2
Verify the trunking configuration.
This example shows how to configure a port to negotiate the encapsulation type and how to verify the
trunk configuration. This example assumes that the neighboring port is in auto mode with encapsulation
set to isl or negotiate.
Console> (enable) set trunk 4/11 desirable negotiate
Port(s) 4/11 trunk mode set to desirable.
Port(s) 4/11 trunk type set to negotiate.
Console> (enable) show trunk 4/11
Port
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4/11
Port
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Port
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Port
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Console> (enable)

Defining the Allowed VLANs on a Trunk

When you configure a trunk port, all VLANs are added to the allowed VLANs list for that trunk.
However, you can remove VLANs from the allowed list to prevent traffic for those VLANs from passing
over the trunk.
78-13315-02
Vlans allowed and active in management domain
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1,5,10-32,101-120,150,200,250,300,400,500,600,700,800,900,1000
Vlans in spanning tree forwarding state and not pruned
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5,10-32,101-120,150,200,250,300,400,500,600,700,800,900,1000
Mode Encapsulation
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desirable n-isl
Vlans allowed on trunk
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1-1005,1025-4094
Vlans allowed and active in management domain
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1,5,10-32,55,101-120,998-1000
Vlans in spanning tree forwarding state and not pruned
---------------------------------------------------------------------
1,5,10-32,55,101-120,998-1000
Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4
Command
set trunk mod/port [on | desirable | auto |
nonegotiate] negotiate
show trunk [mod/port]
Status Native vlan
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trunking 1
Configuring a Trunk Link
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