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Home > Archive > alt.certification.cisco > September 2003 > Would this work ?
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| Atarikid 2003-09-28, 1:24 pm |
| The other day in CCDA class the teacher drew
a diagram on the board with two switches and a router.
Both switches had access ports in VLAN's 2,3.
Both switches were connected by a VTP Trunk.
He then called for a student in the class to come up and
draw how to connect the router WITHOUT using the
Trunks to route between vlans.
A girl came up and drew the one router interface
to an access port in Vlan 2 on switch A. And another
router interface to an access port on switch B in Vlan
3.
The Teacher nodded his head and said that was good.
However I have some doubts.
Now would a PC connected to another access port on
Switch A Vlan 2 be able to talk to Switch B Vlan 3. ?
Of course the Router knows nothing about any VTP
domains.
Does each access ports' ASIC tag the frame with Vlan
colors or is it only the Trunk Ports. ?
I've passed the Switching exam BCMSN but I can't
decide if this would work, it seems like it would not.
Atarikid
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| Hansang Bae 2003-09-28, 4:24 pm |
| In article < pblgnvknr1373b4bnb83rh78ns6c4p
c5bd@4ax.com>,
atarikid@cox.net says...
> The other day in CCDA class the teacher drew
> a diagram on the board with two switches and a router.
> Both switches had access ports in VLAN's 2,3.
> Both switches were connected by a VTP Trunk.
> He then called for a student in the class to come up and
> draw how to connect the router WITHOUT using the
> Trunks to route between vlans.
> A girl came up and drew the one router interface
> to an access port in Vlan 2 on switch A. And another
> router interface to an access port on switch B in Vlan
> 3.
> The Teacher nodded his head and said that was good.
> However I have some doubts.
You shouldn't. If the router has two Ethernet interfaces, it can be
connected to VLAN 2 and the other to VLAN 3.
> Now would a PC connected to another access port on
> Switch A Vlan 2 be able to talk to Switch B Vlan 3. ?
Yes, via the router.
> Of course the Router knows nothing about any VTP
> domains.
But doesn't need to. It's just two different IP subnets, nothing more.
> Does each access ports' ASIC tag the frame with Vlan
> colors or is it only the Trunk Ports. ?
Trunk port frames get tagged with VLAN tags (but not the native vlan in
dot1q - unless told to do so.)
> I've passed the Switching exam BCMSN but I can't
> decide if this would work, it seems like it would not.
It will work just fine.
--
hsb
"Somehow I imagined this experience would be more rewarding" Calvin
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