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l2-security-bh.ppt
Dynamic Trunk Protocol (DTP)
¥ What is DTP?
Automates ISL/802.1Q trunk
configuration
Operates between switches
Does not operate on routers
Not supported on 2900XL or 3500XL
¥ DTP synchronizes the trunking
mode on link ends
¥ DTP state on ISL/1Q trunking
port can be set to ÒAutoÓ, ÒOnÓ,
ÒOffÓ, ÒDesirableÓ, or ÒNon-
NegotiateÓ
Dynamic
Trunk
Protocol
0x2004
SNAP Proto
0100.0ccc.cccc
DST MAC
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