The switch does not engage in DTP negotiation on this
interface. This command is valid only when the interface switchport mode is access or trunk
(con?¬?gured by using the switchport mode access or the switchport mode trunk interface
con?¬?guration command). This command returns an error if you attempt to execute it in
dynamic (auto or desirable) mode. Use the no form of this command to return to the default
setting. When you con?¬?gure a port with the switchport nonegotiate command, the port
trunks only if the other end of the link is speci?¬?cally set to trunk. The switchport
nonegotiate command does not form a trunk link with ports in either dynamic desirable or
dynamic auto mode.
Table 2-8 shows the steps to con?¬?gure a port as an 802.1Q trunk port, beginning in
privileged EXEC mode.
Some Cisco Catalyst switches support only 802.1Q encapsulation, which is con?¬?gured
automatically when trunking is enabled on the interface by using the switchport mode
trunk command.
To verify a trunk con?¬?guration on many Cisco Catalyst switches, use the show interfaces
interface switchport or the show interfaces interface trunk command to display the trunk
parameters and VLAN information of the port, as demonstrated in Example 2-2.
Pages:
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72