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Guest
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 Posted: Thu Oct 19, 2006 6:10 pm Post subject: Trunking question |
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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 |
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eager
Guest
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| Posted: Mon Nov 13, 2006 6:22 am Post subject: Re: Trunking question |
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<dilan.weerasinghe@gmail.com> wrote in message
news:1161263407.129622.60810@f16g2000cwb.googlegroups.com...
| Quote: | 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. |
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lba
Guest
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| Posted: Sun Feb 11, 2007 5:55 am Post subject: Re: Trunking question |
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eager wrote:
| Quote: | dilan.weerasinghe@gmail.com> wrote in message
news:1161263407.129622.60810@f16g2000cwb.googlegroups.com...
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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baggins
Guest
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| Posted: Thu Sep 27, 2007 5:17 am Post subject: Re: Trunking question |
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On Sep 14, 4:10 pm, tweety <andy....@googlemail.com> wrote:
| Quote: | Hi there,
I am a newbie so forgive my ignorance. I have come acroos 5 switches
(3550's) that are all daisy chained via their gig ports. I am going to
introduce 3 new vlans as there is only vlan 1. Would and could i trunk
the gig ports to allow the vlan traffic to traverse the switches to
the router or would i trunk fa ports?
Sorry if this is a dumb question, but hey i didn't say i was
bright :)
Thanks for any help.
Regards Andrew.
|
Are you sure they are not already trunking? 3550's in their default
configuration will form trunks with each other, Do a show interface
trunk command to see if you have interfaces trunking and what VLANs
are allowed on the trunks. |
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