Trunking question 'switchport trunk allowed vlan'

From: Jason Morris (mcnever@gmail.com)
Date: Tue Feb 03 2009 - 13:48:42 ARST

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_46_se/configuration/guide/swvlan.html#wp1100014

"To reduce the risk of spanning-tree loops or storms, you can disable VLAN 1
on any individual VLAN trunk port by removing VLAN 1 from the allowed list.
When you remove VLAN 1 from a trunk port, the interface continues to sent
and receive management traffic, for example, Cisco Discovery Protocol (CDP),
Port Aggregation Protocol (PAgP), Link Aggregation Control Protocol (LACP),
DTP, and VTP in VLAN 1."

Q1. Ok does anyone know if it sends this traffic (CDP, PAgP, VTP ect.) on
Vlan1 or on the native VLAN?

Q2. If you get a question like 'only allow vlans used in this lab can
traverse trunks' or 'only allow vlans xxx yyy and zzz to traverse this
trunk'. What would you do? (other than ask the proctor)

Thanks
Jason

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