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Bob Simon
Guest
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 Posted: Wed Oct 31, 2007 2:14 pm Post subject: 3750 VLANs |
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Can the Ethernet ports of a 3750 be members of two different VLANs?
If so, how is this configured? |
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Trendkill
Guest
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| Posted: Wed Oct 31, 2007 2:14 pm Post subject: Re: 3750 VLANs |
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On Oct 31, 7:46 am, Bob Simon <nob...@nowhere.com> wrote:
| Quote: | Can the Ethernet ports of a 3750 be members of two different VLANs?
If so, how is this configured?
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Yes and No. You can have auxiliary VLANs configured...most often used
for voip devices. What this means is, the device directly plugged
into the port is on the primary vlan (say the voice vlan if this is a
phone), and then whatever device is plugged into the back of the cisco
phone is put onto the secondary/auxiliary vlan to keep voice/data
separate.
If you are asking about a port truly being in two different vlans,
that is not possible without trunking (generally ISL since dot1q is
proprietary to cisco). If you trunk, you can trunk both vlans and the
box will need to have logical interfaces in both (unless this is
promiscuous and for a sniffer or probe, then it can just listen). |
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