Cisco :: VLAN Tagging At Access Port In Switch?
Sep 28, 2012
I'm Confused from the fact that Vlan tagging is done at access port and trunk port always gets tagged packets (untill its case of native vlan).But I still believe in other fact which says tagging happen only when a frame hit the trunk port which means trunk port gets untagged frame and tagging is not possible at access port.
Would like to know where actually this tagging happens ?
and also which command we can use to encapsulate 802.1q protocol to access port ? The way we do at trunk port is #switchport trunk encapsulation dot1q Is the above command applicable for access mode also?
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Jan 14, 2013
I've been experimenting with the 'vlan dot1q tag native' command on a switch and it seems as though tagging the native vlan breaks vty access to my access point.With the 'vlan dot1q tag native' commnand applied, I lose management connectivity to the AP with 'no vlan dot1q tag native' applied, connectivity is restored. Why is this? Is it safe to say that one can access the AP via vty lines using ONLY untagged packets?
SWITCH
Model: WS-C3560G-24PS
Code: c3560-advipservicesk9-mz.122-46.SE
--Abbreviated CONF
vlan dot1q tag native
[code]....
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Feb 21, 2012
cant assign cisco switch 3560G port g0/1to access vlan 10
main-switch(config-if)#switchport access vlan 10 Command rejected: Gi0/1 not a switching port.
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Jul 29, 2012
Unfortunately I do not remember the model and the switch is a couple of hours away without remote access.I have 4 vlans on a procurve switch.
VLAN1 - Network Devices (Server, printers, WAPs)
VLAN100 - Admin (Office workers)
VLAN200 - Teachers
VLAN300 - Students
There is a server doing DHCP. There are 4 ranges of IPs 1 for each VLAN.
The router is on Port 44. VLAN 1, 100, 200, 300 - Tagged
The Server is on Port 46. VLAN 1 - Untagged
The WAPs are on Ports 1, 11, 31 VLAN 1, 100, 200, 300 - Tagged
All other ports are on VLANs 100, 200 or 300 - Untagged
The WAPs all have VLANs 100, 200, 300. Each VLAN on a different SSID.
I have IP helper with the server IP on VLANs 100, 200, 300.
There are IPs from the different subnets on their respective VLANs in the switch.
The gateway for each subnet is on a different subinterface on the router.
The router is a linux box. (Untangle)
The WAPs are not able to talk to the server, therefore no computers on the wireless networks can get an IP.The server can only talk to the router if I change port 44 to untagged.What combination of tagged and untagged ports do I need to make everything talk?
Do I need to put the VLANs on the subinterfaces of the router?
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May 18, 2011
I need some assistance in setting up VLAN's (802.1Q) accross two switchs, I want the same 2 vlan's on both switchs, how do i configure them to be connected and pass both vlan's traffic.VLANs from firewall are tagged at 3 and 8.Single port out from the firewall.The first switch is simple enough, port is connect at port 52 and configured from both vlan's then the individual ports are either on one or the other. The question is how do i connect the second switch so that it can also do both vlans. Assume I connect switch1 at port 51 to switch 2 port 52. Do I configure both ports to be on the same VLAN's. or do i setup LAG's.
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Aug 19, 2011
I am currently tasked with setting up a network, pretty much from scratch, that requires some fairly hefty VLAN deployment. My hardware on hand (already existed so can't can't change anything easily) 5x ESW-540-48 Switches, 1x3750g switch, 1x2811 router. I don't believe the router should be required as the 3750 is capable of intervlan routing. [code]
Now at one point I actually had the VLAN's *working* in that I could specify an IP address and could ping to and from it! However DHCP wasn't passing despite numerous attempts with DHCP relay and IP-Helper configurations.Also I was having issues with VLAN 1 as the native VLAN, the ESW switches don't allow you to do much with them, as they 'weren't created by the user'. So tried switching that out to VLAN11 also but with very little success there (I had to change the native vlan on all trunks to VLAN 11)All the 10.x.x.x addresses need to be able to communicate with each other.All the ESW switches need to be able to handle their respective VLAN's as well as VLAN 1 (for Printers and wireless access points distributed around the building).
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Nov 23, 2011
We are having one HP core switch and VLAN is configured on it. Four Nortel BES1010(24port) switches will be connected to this HP switch. We need to configure the VLAN tagging in the Nortel switches in order to make deices connected to nortel switches can communicate with devices in the VLAN.
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Feb 13, 2012
I have a sf300 with (2) vlans (1) ] vlan for data and vlan (100) is my voice vlan I have Vlan (100) tagged traffic, and my VoIP pbx as an access port only to vlan (100) all other ports are trunk ports with vlan (100) tagged and vlan (1) untagged traffic. I get no outbound audio on calls I can call out hear them fine they cant hear me. I am wondering if my tagged traffic leaving the phone is being striped and if so were. I have CDP turned off.
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Jun 13, 2013
We are trying to replace the CSS between our firewall and DMZ with a BigIP. Among it's other functions, it will act as the router between the firewall and the DMZ. To make this work, I need to assign vlan tags values for the vlans I create on the BigIP box and these must match the tags on the cisco switches (3550's) How do I find this information on the switch?
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Oct 25, 2012
we have a base license ASA 5510, and been trying to get ICMP working to check that we're routing and not hitting any NAT translation. We have a VLAN280 setup to ISP for VPN link to remote site and another VLAN281 for internet access for internal users.
Users can browse internet from (name _inside interface e0/1 access port) which is fine. When I do a ping to remote office through the VPN I get a response pinging from VLAN280 name VPN_Link. When I do a ping from name inside interface I don't get a response both are security level 100 with same-security-traffic permit inter-interface configured.
Config:
!
interface Ethernet0/0
speed 100
no nameif
[Code]....
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Feb 14, 2012
I rencently bought the E4200v1 router, to be wired together with my WRT610nv2 to form gigabit network for different floor network.However with the recent installation of fiber to home network offered by my local ISP, I would need router that capable for performing vlan tagging (500 for internet & 600 for IPTV).Would like to know if Cisco have any development plan to enable the VLAN option for:-
1. E4200
2. WRT610nv2
At the moment, I'm still stuck with the provider "home-made" router which lacks of Gigabit & dual band wireless.
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Oct 30, 2011
Having an issue getting my DMZ vlan working. Running my ASA5505 and i have configured e0/2 for DMZ w/ VLAN ID 3. Connected to my 2716 on port2.Inside e0/1 w/ VLAN ID 1. Connected to my 2716 on port1.
I am trying to get my DMZ Vlan to ports3&4 (LAG1) but when i assign the LAG group to PVID 3 i lose connectivity on VLAN1. I want to send both VLANs to that host because the teamed adaptor is used for Hyper-v Network Switch.
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Jul 5, 2012
I have a 2960 switch connected to another. The I need to verify that vlan0010 on one switch is forwarding tagged traffic between the other switch it is hooked up to through the Gi0/1 port. How do I verify this? I have a server that's multihomed (Broadcom) on the other side an it is supposed to be on this vlan with one of it's network interfaces. We had a pwer outage and now it cannot communicate on this vlan. However, everything else on the vlan can reach all the other nodes accept this server in the front of my building. All the devices in the same room are linked to the same switch which has one port (fa0/17) on vlan0010 and can ping eachother just fine. The server is hooked to port 24 on my server room switch and Gigabit port one goes to a fiber converter all the way to the back. It then gets converted from fiber to cat5e again and links into the switch (2960) in the backroom.
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Mar 18, 2012
I'm a little stuck with a 4400 7.0.220.0 + RAP 1550 + MAP 1260 Ethernet bridging issue. I'm using the VLAN tagging functionality and I'm finding that periodically a VLAN that I've tagged on the MAP will deregister from the backhaul and stop passing traffic. If I go into the Mesh tab on the MAP, select the wired interface, remove the VLAN from the list of tagged VLAN IDs and then add it right back to the list, its starts passing traffic again
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Dec 13, 2012
We have a problem with CDP packets on sent by our Cisco 6509's. Unlike our other Cisco switches (4948G, 5020, etc.), the 6509 tags administrative traffic on the native vlan. As a result the CDP packets are sent with an 802.1Q header with a tag of 1. The other switches send the CDP packets untagged on the native vlan. This causes problems because we have non-Cisco devices in our lab that also receive and send CDP, but they do not process the packets that are tagged by the 6509. They see the packets from the 4948 and 5020 just fine.
How can I disable the administrative native vlan tagging on the 6509? Here is the current setup:
nwkdev-6509-1#show vlan dot1q tag native
dot1q native vlan tagging is disabled globally
nwkdev-6509-1#show interfaces gigabitEthernet 1/9/1 switchport
[Code].....
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May 1, 2013
Our enviornment includes 3560 switches and 2800 routers. We have a few remote offices using an application on TCP port 1677 that use far to much bandwidth. Our WAN provider can throttle and police this for us, if I can TAG this traffic, for example all Traffic from Florida using the Groupwise app on TCP uses TCP port 1677 and I want it tagged with CoS 3.
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Sep 22, 2012
Me and my friend is currently setting up a Xen test environment. As you can se from the picture below we are running a Cisco ASA 5505 to reach the network from the outside.But the problem is that we want to reach the virtual pfSense's subnet's through the Cisco AnyConnect VPN. And currently the pfSense's are only configured with a public ip and a virtual interface to the VM's.could solve this problem by buying another PCI NIC, so that we have a physical link from the "pfSense box" to a tagged VLAN on the switch.But we are having problems configuring the switch to general vlan's. Cause Xen can't have it's management interface on a tagged VLAN directly from the XenServer,but the switch can tag the packet when it reaches the switchport. I would like to have "switch port general allowed vlan 2" for admin and 10 for "LAN"And then trunk the port to the Cisco ASA. But again, Xen stops me from doing this.
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Sep 13, 2012
I am tryıng to confıgure port base Vlan on 3com S7900E switch. There are already 9 of them confıgured but one is missing and I need to add 1 more. I have done this on cisco routers but cant get my head around 3com commands.
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Feb 16, 2013
There are 5 VLAN's and all can communicate through all the different subnets, but VLAN5 can not communicate to the RVS 4000.
VLAN Smart Port set to switch and router - this is not working What Smart Port configuration should be set up to talk to the LAN port on a RVS4000?
VPN is set up and connected, but when trying to connect to the client can not connect to remote networks.
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Dec 12, 2012
We have a 24 port and 48 port 3560 E switches with identical IOS the 48 port switch supports private vlan while 24 port switch doesnt
configure private vlans on 24 ports 3560e and is it best practise to configure private vlan on this platform(3560)?
IOS version : C3560E Software (C3560E-UNIVERSALK9-M), Version 12.2(55)SE3, RELEASE SOFTWARE (fc1)
flash:/c3560e-universalk9-mz.122-55.SE3/c3560e-universalk9-mz.122-55.SE3.bin
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Feb 26, 2013
Region : Malaysia
Model : TL-WDR4300
Hardware Version : V1
Firmware Version :
ISP : Maxis
I bought the TL-WDR4300 almost 6 months ago using it on my TM Streamyx broadband service, it worked perfectly and this is indeed a very good product very reasonably priced too Kudos to TP-Link. The thing is shortly after purchasing it, I moved to Maxis Home Fibre Internet (more bandwidth). Following the ISP change the router has since went back into the box and had been there for 5 months now. This is because without the VLAN tagging feature or a Maxis mode, it is currently incompatible with Maxis Home Fibre Internet and will stay that way.I understand this is by no mean TP-Link's fault but I and many other WDR4300 owners on Maxis, if TP-Link could look into ENABLING VLAN TAGGING FEATURE/MAXIS MODE on this device. This I am sure would work with TP-Link sales as there are not many routers out there with this feature set and price range that could work with Maxis Home Fibre Internet.
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Nov 14, 2012
What the different between using hsrp on vlan interface and on physical port (routed port) on Cisco 3750 Switch? Wha the benefits?
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Nov 12, 2011
Why I cannot ping vlan when no port connect to switch.
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Apr 20, 2012
I have an old Nortel network with a bunch of servers attached. Connected to it is the new Cisco core, by way of a routed port. My task is to migrate servers over to the Cisco side of the network, with minimal downtime, and have full network connectivity, retain IP addresses/remain on the same subnet, and retire the Nortels. The Nortels are running VRRP, so I can fail the gateway over by becoming part of that group and later dropping the Nortels, but I can't seem to get a host on the Cisco side to participate in the original subnet. The routed port kills VLAN traffic, so I tried bridging the VLAN with the routed port, to no avail.
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Feb 20, 2011
how to create a vlan access port on ASR9000?
I want to connect a server to the ASR9000, but i don't know how to configure the port as access.
I have configured a bridge-group & bridge domain
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May 9, 2012
I start writing this post telling you that I'm not a qualified network admin, so I beg your pardon if I do not use appropriate terms in my question. Also my english in not so good since I'm Italian and my english in almost scholastic.
This is the "story" :
I bought two switches as described above and actually I have to create 2 VLANS as described below :
VLAN id 2 name "Service_A" ports 1-4
VLAN id 3 name "Service_B" ports 7-9
all other ports can stay in default VLAN1.
my network infrastructure have some other very simple swtiches connected and 1 soho router (static ip 192.168.1.1) with dhcp active and ip pool address released from 192.168.1.100 to 200.
the SG200-26 have static ip 192.168.1.254 and 192.168.1.253
MY NEEDS:
I need VLAN for privacy matter so all computer connected to ports in VLAN2 cannot see nor enumerate PCs and resources on other VLANs, but I also absolutely NEED that all computer in every ports (and every VLAN even default VLAN1) can access the internet.
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Feb 6, 2013
I have a LIII Switch Cisco 3750x ,with diffrent Vlans , Some users are in Vlan 102 (10.10.2.0) and Some Users are in Vlan1 (10.10.1.0) , now i want to restrict the Vlan102 users to access Vlan1 , i am pasting my configuration below , how to create a access list .
interface Vlan1
ip address 10.10.1.36 255.255.255.0
ip helper-address 10.10.1.36
[Code].....
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Feb 3, 2013
The field engineer has a stand alone 24 port 2900 series switch that he has different equipment connected to and are segmented using VLANs. So for example, he's got ports 1-4 assigned to VLAN 10, 5-12 assigned to VLAN 20, 13-19 assigned to VLAN 30 and 20-24 assigned to VLAN 40. He would like all the gear on VLAN 30 to have the ablity to talk to all of the other VLANS, but VLAN 40 should not be allowed to talk with any other VLAN. Trunking would do no good here since the switch isn't connected to anything and you can only assign one VLAN per port.
Is there a way to do this within the stand alone switch? The only possible way I could think of would be to ensure that each VLAN has an assigned IP number (subnet) and doing this through access lists.
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Oct 25, 2012
I'm new to networking and was looking for some assistance. First off im using packet tracer to diagram my senario as I will be receiving my equipment next week to deploy.
Hardware to be used:
1. 2 catalyst 3560 switches
2. all connect to a sonic wall router
I have two companies that work in the same office space. I need to keep these companies seperate on their own vlan. They will however need to share the phone system.(Packet tracer file uploaded to give those who have the time to see what I put together.) [code]
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Apr 5, 2011
I have this Cisco Switch: SRW2048-K9-NA. When I log into the Web GUI, I am provided the two options mentioned above for VLAN Management. I have fiddled with the two options and they seem identical to me. Is there really a difference, maybe better flexibility?
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Jan 10, 2013
I have two networks at two sites with a dot1q trunk between the two L3 switches at both sites (no routers involved)
SITE A - Cisco 3750 L3 - VLAN ID 50
10.10.50.0/24
SITE B - Cisco 3750 L3 - VLAN ID 50
10.20.50.0/24
I would like to extend the SITE A VLAN to SITE B so that I can move hosts from SITE A to SITE B without needing to change their IP address but the vlan ID is already in use. Obviously the easy solution is to change the VLAN ID for one or other of the sites but both sites contain hosts that run 24/7. Is there a way to join two VLANs with different IDs together.So for example I create a new VLAN 60 at SITE B and associate it with VLAN 50 at SITE A.
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May 12, 2011
We are trying to config vlan 10 for data and vlan 20 for voice on the same port - port 1 of swtich SF300-24P to run both data and voice on different vlans.Do I have to add vlan 10 as an untagged vlan to port 1 and add vlan 20 as an tagged vlan to port 1?If I do not want to assign the native vlan 1 to port 1, how can I remove it ? The GUI page - assign VLAN to port does not allow to remove it.Aslo, what mode shall I set up on port 1? General, trunk or access ?
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Feb 2, 2011
I have set up 2 DHCP pools and 2 VLANs (1 *the native* for data / 1 VLAN for voice). When I use the command "switchport voice vlan 20" the port disapear from the show vlan brief list. When I use the "switchport access vlan 20" it shows up in the show vlan brief in the correct VLAN and gives the phone an IP. I assume that using the access instead of the voice is wrong and the phones would not configure correctly. But when I use the access the phone goes to the next step and tells me the TFTP files are not found. Why does the port disapear from the VLAN list?
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