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TOPIC: vlan config question

vlan config question 14 years 4 months ago #5848

hello all, i need to vlan a cisco 3548 with 8 vlans. that part is easy, but i want to make a port a member of all 8 vlans and connect it to a pix port so all the vlans can share the firewall interface without being able to see each other. all the vlans will be in the same class c network 192.168.160.x. is this possible? has anyone done this? thanks for any help you can offer.


well, it does work 14 years 3 months ago #6145

i gave up waiting. i tested it myself, and it works great! hasn't anyone else done this kind of thing?

Re: vlan config question 14 years 3 months ago #6151

Haven't done this myself.. how did you go about it though ?
Sorry bout the lack of response, somehow I missed this post.

Sahir Hidayatullah. Staff - Associate Editor & Security Advisor

Re: vlan config question 14 years 3 months ago #6160

  • Chris
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Can you post us your solution's configuration so everyone else can view it ? This could be also added into the lab scenarios we are working on.

Chris Partsenidis.
Founder & Editor-in-Chief

Re: vlan config question 14 years 2 months ago #6494

oh mate,

u r really a geek out there. i dont know how u make a single port as the member of 8 vlans and then connect to PIX.
does the PIX u are using supports subinterface ?

i really am happy with this type of setup if it works bcoz there is more than security factor involved

please post your config.

with regards

Re: vlan config question 14 years 2 months ago #6515

This is what probably worked for him.

Step 1

configure terminal

Enter global configuration mode.

Step 2

interface interface

Enter interface configuration mode, and enter the port to be added to the VLAN.

Step 3

switchport mode multi

Enter the VLAN membership mode for multi-VLAN ports.

Step 4

switchport multi vlan vlan-list

Assign the port to more than one VLAN.
Separate nonconsecutive VLAN IDs with a comma; use a hyphen to designate a range of IDs.

Configuring a switch port for multi-VLAN mode causes VTP to transition to transparent mode, which disables VTP.

Step 5


Return to privileged EXEC mode.

Step 6

show interface interface-id switchport

Verify your entries.
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