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Posted by lba on February 10, 2007, 6:17 pm
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eager wrote:
>
>>Hi
>>
>>I am doing a lab exercise in preparation for the BCMSN.
>>
>>There is a 2950 access switch connected to two 3550 distribution
>>switches.
>>
>>On the 2950, fa0/1 and fa0/2 are connected to 3550A and fa0/3 and fa0/4
>>are connected to 3550B.
>>
>>At the moment, ports fa0/1 - 4 on the 2950 are in VLAN99.
>>
>>The instructions are to -
>>
>>i) Assign fa0/1 - 4 back to VLAN1.
>>ii) Turn on trunking on the ports connecting the 2950 and 3550's and
>>use 802.1Q trunking.
>>
>>My response was;
>>
>>i)
>>
>>2950#conf t
>>2950(config)# interface range fa0/1 - 4
>>2950(config-if-range)# switchport access vlan 1
>>2950(config-if-range)# switchport mode trunk
>>2950(config-if-range)# switchport trunk encap dot1q
>>
>>and then
>>
>>3550A#conf t
>>3550A(config)# interface range fa0/1 - 2
>>3550A(config-if-range)# switchport mode trunk
>>3550A(config-if-range)# switchport trunk encap dot1q
>>
>>and also
>>
>>3550B#conf t
>>3550B(config)# interface range fa0/1 - 2
>>3550B(config-if-range)# switchport mode trunk
>>3550B(config-if-range)# switchport trunk encap dot1q
>>
>>The lab, however, states that it should be;
>>
>>2950#conf t
>>2950(config)# interface range fa0/1 - 4
>>2950(config-if-range)# switchport access vlan 1
>>2950(config-if-range)# switchport mode trunk
>>2950(config-if-range)# switchport nonegotiate
>>
>>and then on both switches;
>>
>>3550#conf t
>>3550(config)# interface range fa0/1 - 2
>>3550(config-if-range)# switchport mode trunk
>>3550(config-if-range)# switchport nonegotiate
>>3550(config-if-range)# switchport trunk encap dot1q
>>
>>Which is correct, or is this just two ways of doing the same thing?
>>
>>Thx
>>
>
>
>
> Different switches use different commands for creating vlans (i.e. vlan
> database, vlan 2 name vlan2, switchport mode access, etc.)
> Configuring Router subinterfaces is very important too.
>
>
If I remember well "switchport trunk encap dot1q" does not exist on a 2950.
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