Multiple Vlans on a single port.

hi,
Can i configure single port with multiple vlans on L2 2950 switch, if yes then what are the commands.
Thanks,
Vishal D.

Paresh,
i think i have not quoted the question properly.
see by doing 'switchport mode trunk' it will flow the traffic of all vlan right.
but if i want to give access of selected vlans then what to do,
i have tried the command 'switchport trunk allowed vlan 1,2,3'
do i have to give encapsulation on that port, but on 2950 encap cannot be configured.
now can u tell me wht is possible to do.
Thanks for ur reply.
Vishal.

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How do I set up multiple VLANs on a single switch?

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Got this answer.
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Scenario for single WLAN to multiple VLANs

Hi there,
I read from this forum some discussion about the WLC VLAN Select feature.
http://www.cisco.com/image/gif/paws/113465/vlan-select-dg-00.pdf
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Please Make sure to rate correct answers

Multiple sockets connected to one port

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Multiple devices on a single USB port

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Binding multiple VLANs to single SSID on WLC

I have a building with over 4000 users and would like to bind multiple VLANs for user access to a single SSID in WLC. Can this be done? I would rather not have 4000 wireless users on a single VLAN.

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WRT160Nv2-Problem with Single Port forward to multiple servers with same internal port numbers.

On my network I have 3 systems that I've set up as RDP hosts. And need to get to all three of them externally. So I'm trying to do the following single port forwarding.
RDP 1   Forward 4000 to port 3389 for 192.168.1.11
RDP 2   Forward 4001 to port 3389 for 192.168.1.12
RDP 3   Forward 4002 to port 3389 for 192.168.1.14
When I hit "Save Changes" I get the error "Port range already exists". So it's good that it won't let me overlap ports generally, but at the same time, I'm trying to send them to different IP address. There should be no overlap in this case. Please advise
I'm trying this on the WRT160Nv2 with firmware 2.0.02, which I had just bought this weekend.

kevj,
Thanks for your suggestion. I have now upgraded the firmware to 2.0.03 build 7. But I am still seeing the error message
As I mentioned previously, I'm trying to single port forward to multiple machines in the following way:
Machine 1:   Forward 4000 to port 3389 for 192.168.1.11
Machine 2:   Forward 4001 to port 3389 for 192.168.1.12
Machine 3:   Forward 4002 to port 3389 for 192.168.1.14
The error appears to be generated by the fact that 3389 is selected for multiple external port numbers, but the same internal port number. The router I believe isn't taking into account that the similar internal port numbers aren't taking into account the different internal ip address I'm trying to send this to.
This would be a standard sort of practice for running a live HTTP server on one machine, and a new beta HTTP server behind the router on a secondary machine on the same internal port, but different external port numbers for test purposes from the outside.
Please advise
Thank you.

Query on Vocie and Data VLan on same Swithc port

Hi All,
This is query regarding allowing both Vocie and data Vlans on a single switch port. I knew tehre are different ways to configure and acheive this, but not sure how techncially they are different from each other>
Way 1:
interface FastEthernet1/5
description *** IP Phone/Data Port ***
switchport trunk native vlan 10
switchport mode trunk
switchport voice vlan 16
no logging event link-status
no snmp trap link-status
mls qos trust cos
spanning-tree portfast
sh int trunk
Port      Mode         Encapsulation Status        Native vlan
Fa1/5     on           802.1q         trunking      10
Fa1/7     on           802.1q         trunking      10
Fa1/12    on           802.1q         trunking      10
Fa1/13    on           802.1q         trunking      10
Fa1/14    on           802.1q         trunking      10
Port      Vlans allowed on trunk
Fa1/5     1-1005
Fa1/7     1-1005
Fa1/12    1-1005
Fa1/13    1-1005
Fa1/14    1-1005
Port      Vlans allowed and active in management domain
Fa1/5     1,10,16
Fa1/7     1,10,16
Fa1/12    1,10,16
Fa1/13    1,10,16
Fa1/14    1,10,16
Port      Vlans in spanning tree forwarding state and not pruned
Port      Vlans in spanning tree forwarding state and not pruned
Fa1/5     1,10,16
Fa1/7     1,10,16
Fa1/12    1,10,16
Fa1/13    1,10,16
Fa1/14    1,10,16
sh vlan-switch
VLAN Name                             Status    Ports
1    default                          active    Fa1/0, Fa1/1, Fa1/2, Fa1/3
                                                Fa1/4, Fa1/6, Fa1/8, Fa1/9
                                                Fa1/10, Fa1/11, Fa1/15
10 DVLAN                            active
16 VVLAN                            active    Fa1/0, Fa1/1, Fa1/2, Fa1/3
                                                Fa1/4, Fa1/6, Fa1/8, Fa1/9
                                                Fa1/10, Fa1/11, Fa1/15
In the above config, the port Fa 1/5 which is currnetly up and running( this port is ocnencted with IP phoen and a PC) is not shown in sh vlan-switch output as assigned to vlan 10 or vlan 16. Not sure it is becuase the output was taken from ISR rotuer with NM 16-ESW module .
sh int fa 1/5 switchp
Name: Fa1/5
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Disabled
Access Mode VLAN: 0 ((Inactive))
Trunking Native Mode VLAN: 10 (DVLAN)
Trunking VLANs Enabled: ALL
Trunking VLANs Active: 1,10,16
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: 16
Appliance trust: none
In above ocnfig, the port is configured as trunk and hence it can carry multiple vlan traffic on swithcport. As IP phones will have inbuilt switch which runs DTP by default and CDP to reciognize the conencted devcies. I am not sure how this config works as even it's configured as trunk the DTP negotiation is disabled and how phone switch can differentiate the voice frames and data frames. Please explain in loigcal as it's known that as we have confgiured vlan 10 as native and vocie vlan 16 as trunk it carries the voice traffic.
Way 2:
interface FastEthernet1/2
description *** IP Phone/Data Port ***
switchport access vlan 10
switchport mode access
switchport voice vlan 16
no logging event link-status
no snmp trap link-status
mls qos trust cos
spanning-tree portfast
In the above config, even the port is access it's carrying multiple vlan traffic despite of being trunk port. Not sure how the trunk will be formed even DTP neogotiation is off. Isi t because of voice vlan command and if so what it deos exactly. Please can anyone elaborate in detail. Sorry, if my post is big and confusing
sh int fa 1/2 switchport
Name: Fa1/2
Switchport: Enabled
Administrative Mode: static access
Operational Mode: static access
Administrative Trunking Encapsulation: negotiate
Operational Trunking Encapsulation: native
Negotiation of Trunking: Off

Switch - Phone - PC
1. First question:
     # int f0/1
     # switchport mode access
     # spanning-tree portfast
     # switchport access vlan 50
     # switchport voice vlan 10
This is the ideal way to configure and in all latest IOS Switches and in latest ISR routers, we do this as the command "switch port voice vlan" command says to switch port that it carries the voice traffic as tagged and PC as untagged.
As we all know the default switch port of a switch will be either Dynamic auto or Dynamic Desirable which means DTP is on and in turn it means negotiation of trunking is ON. This is as per my understanding.
The Sub-Questions for 1st Question are below:
1 Does the trunk negotiation happen between Access Switch switch port and Mini 3 Port Switch within the IP Phone. If mini switch in IP PHone negotiates to form trunk based on DTP then what’s the default switch port mode of mini switch in the IP Phone.
2. As in above config we are no where mentioning the port to be trunk. But it’s still allowing multiple vlan’s traffic to carry on access port. The switchport mode is access when you do “ sh int fa 0/1 swithcport.”. Is it the swithcport voice vlan command does the magic?
2. Second Question:
     # int f0/1
     # switchport trunk encapsulation dot1q
     # switchport trunk native vlan 10     (data VLAN)
     # switchport mode trunk
     # swichport voice vlan 15
The Sub-Questions for 2nd Question are below:
When do we use this configuration.? In my set-up the above config is seen on 2811 ISR routers with NM-16ESW modules. Can’t we configure the data vlan a switch port access vlan 10 , instead of trunk native vlan.

3750 - QinQ Multiple VLANS - Vlan mapping

Hi All,
I have a client that uses vlans that already exist on our network (vlan 1,2,3,99,100,200,250...) nethier of us are in a position to change the numbering at this stage.
3750 stacks are on the client side and on my side
what is the best way to configure QinQ or vlan mapping to connect their network to ours without a major outage?
hypothetically, is there a way to have a Ether Channel and trunk all the client vlans to our VMware infrastructure
* map vlan 99 on the client side to vlan 299 on my side
* map vlan 100 on the client side to vlan 298 on my side
* map vlan 200 on the client side to vlan 297 on my side
Thank you in advance
I have googled etc and found alot of info on QinQ for access ports / single vlans but not for multiple vlans / trunks

Janene
The vlan numbering may be the same but what about the IP subnets used per vlan.
If the IP subnets are different why not just route between the two switch stacks then the vlans are not visible to each other.
If you need the throughput you could always use L3 etherchannel for additional links.
You could use static routes between each stack or run a dynamic routing protocol to exchange the routes (dependant on the feature sets on your stacks).
Further advantages would be with L3 each site contains it's own broadcasts and there would be no outage for this.
Obviously if the IP subnets are the same then please ignore the above.
Jon

How can I connect multiple clients to a single client ?

I am currently developing an instant messaging program.I created a server and connected multiple clients to it by using thread logic.However I do not know how to connect multiple client to a single client.
What shall I do for that?Does anybody know a good tutorial or sample program?Or shall anybody explain me what I shall do for building the Instant Messaging part of my chat program?
Thank u in advance.

You may use UDP multicast socket. But since you are using the UDP protocol you might risk losing the data that you send since UDP does not guarantee the safe transfer of data.
Alternately, you might create a server that allows multiple client to connect to it whose connection Socket objects are then stored in a Vector <Socket> object. The server then sends back data to the connected client about the other clients connected to it. Now when the client wants to send data (like an IM) to another connected client, it has to send a request to the server specifying the client login name and the server in turn streams that particular client's Address and Port to the requesting client. The requesting client then initiates the connection with the other client and then starts a conversation. One more thing, when the client communicates it needs to send information to the server like the name by which it likes to be referenced. In this scenario the server acts like a central repository for clients to query the existence of other clients in the chat room. Each client here runs a thread that listens to incoming connections and when a connection is established, may be opens a IM window or something.
The third option is to make the server to relay the information from one client to another. Like say, I'm connected to whoopy server and i want to send "Hello" to jackson, then i send the message (ie, Hello) along with the name of the client to which i wish to send it to (ie, jackson). The server then performs a lookup in its Vector <Socket> object and then initiates a connection with jackson and sends the information. However, this method is pretty costly in that you will be wasting a lot of processing behind the server.
--Subhankar
P.s. If you stumble upon any other brilliant ideas let me know.

Is it possible to configure 2 SSIDs without using multiple VLANs?

I am trying to set up a 1231G to allow normal users to connect using WEP and visitors to connect with no encryption in guest mode. Using one SSID, I can get one or the other to work using the guest-mode command on the SSID, but have the problem that WEP mandatory or optional on the radio interface disables either the normal user or the guest. If I set up 2 separate SSIDs for each of these user groups is it necessary to assign a separate VLAN for each to make this work? The AP is on a network that is not trunked.
Thanks for any help or direction you can give me.
--Sara

Hi Sara,
Hopefully the attached docs will answer your question:
Cisco Aironet 1200 Series
Using VLANs with Cisco Aironet Wireless Equipment
Deprecated versions of Cisco Aironet software permit binding multiple SSIDs to one VLAN. Current versions do not.
http://www.cisco.com/en/US/products/hw/wireless/ps4570/products_configuration_example09186a00801d0815.shtml#
Cisco IOS Software Configuration Guide for Cisco Aironet Access Points, 12.2(15)JA
Configuring Multiple SSIDs
vlan vlan-id
(Optional) Assign the SSID to a VLAN on your network. Client devices that associate using the SSID are grouped into this VLAN. You can assign only one SSID to a VLAN.
http://www.cisco.com/en/US/products/hw/wireless/ps4570/products_configuration_guide_chapter09186a00802085c4.html
Also this answer from Cisco Aironet 1200 Series FAQ;
Q. How many service set identifiers (SSIDs) can you have per VLAN?
A. You can have only one SSID per VLAN. The use of multiple SSIDs over a single VLAN is not supported with Aironet APs.
Hope this helps! (sorry to be the bearer of bad news)
Rob
Please remember to rate helpful posts.......

Want to add multiple idoc type with single message type.

Hi Gurus,
I have a problem. I want to add multiple idoc type with single message type in WE20.
How we can do this in WE20 or is there any other way to do that?
Please help me.
Thanks in advance.
Srimanta.

hi,
basically in partner profile i.e. in we20 , we add details to the receiver / sender port that we have created using we21.
so what exactly we do in that is that we first use the message type for those idocs that we have created.
now based on those message type we create a process code. now this is the reason why you cannot apply several message types with the same name in we20... as process code is unque for each message type.
so thats why you can only assign the same message name to several idocs in we82 and then in we20 define the process code for that message type.
it will solve your problem.
hope this will help you!!!
Thanks & regards,
punit raval.

Multiple Vlans on a single port.

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