Cisco Switches :: Dynamic VLAN Assignment And Layer 3 Switching On 300 Series?
Jul 11, 2012
I have a SG300-28P switch. I just read in the Administration Guide that, when in Layer 3 mode, the switch doesn't support MAC-based VLAN or Dynamic VLAN Assignment.
So, in order to assign a client to a VLAN based on their MAC or based on the response of a RADIUS server, we have to disable layer 3 features. Without layer 3 switching, the switch is unable to act as a default gateway and forward packets between VLANs. As a result, the VLANs can't communicate in any way, or access the internet, unless a separate router is connected to every VLAN. Right? Doesn't this limitation significantly reduce the usefulness of the DVA feature?
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Mar 18, 2012
I want to setup VLAN with the switches SG300 and SLM2024. What is the suggestion to connect these 2 switches. We have the Juniper net screen.
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Jan 16, 2011
I have just upgraded our WLC from 4.0 to 7.0 (via 4.2). Before the upgrade we had our ACS returning a VLAN based on user group. This seemed to be working without an issue. Now that the WLC is on version 7 this is no longer working correctly. The ACS is returning a VLAN and passing the user but the client can not get an IP from the DHCP server configured.
Example configuration:
SSID-----VLAN
PN-CSC-----CSCVlan: Works
PN-Others------OthersVlan: Works
PN-Others-----CSCVlan: No DHCP
When users are trying to be allocated to a vlan that is different from the native one the DHCP fails however both WLANs are configured to point to the management interface so dont have any real connection to the vlan other than by name.
Have there been any changes I haven't seen in the way the dynamic vlan allocation works in version 7?
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Dec 13, 2012
I'm having trouble getting the dynamic vlan assignment to work on my 1242AG Cisco Aironet APs. I've seen multiple cases with a similar setup and configuration where it works just fine. I've tried everything I can think of. IAS and AD is running on Windows Server 2003.Everything works fine except the vlan assignment. Wireless clients successfully authenticate through IAS and Active Directory, but instead of being switched to the appropriate vlan the client stays in whichever vlan/ssid it originally connected to.PEAP is the authentication method, using MS-CHAP v2. Naturally I have the attributes in the policy set appropriately,[code] I've attached the config for the AP, which shows that I have two vlans/SSIDs set to cipher, aes, network eap, wpa, etc. I noticed that if the Tunnel-Pvt-Group-ID attribute is set to a vlan id that doesn't exist on the AP then the AP makes an event log saying so.
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Nov 27, 2012
Does the WAP4410N support Dynamic VLAN assignment by means of 802.1x authentication?
The reason why I ask this; I am able to configure a SSID on a WAP4410N with WPA2-Enterprise, in combination with 802.1x PEAP network authentication. I can succesfully connect Windows, Windows RT, Windows Phone, iOS and Android devices. But.. I am unable to designate them to another VLAN based on access/connection policies. For example; I want mobile devices such as iPhone and Windows Phone to be assigned to a specific VLAN. The Wireless Access Point (authenticator) must be able to support that.
This is my setup:
Spplicants: Windows 8 / iPad / ...
Authenticator: WAP4410N
Authentication Server: Microsoft NPS (Network Policy Server)
I used 802.1x PEAP (Protected EAP) with password (domain user) authentication. In fact, the suplicants communicate with 802.1x to the authenticator. The authenticator communicates with RADIUS to the authentication server. NAP is not in between. It's just plain 802.1x authentication.
wether dynamic VLAN assignment is supported?
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Jan 28, 2013
When the users connect their laptop they are getting a authentication prompt but the switch is not changing the VLANs on the port after successful authentication.Below are the logs on the switch
Jan 28 2013 17:21:32.417 CST: RADIUS: Framed-MTU [12] 6 1500
Jan 28 2013 17:21:32.417 CST: RADIUS: Called-Station-Id [30] 19 "E4-D3-F1-0B-C6-0A"
Jan 28 2013 17:21:32.417 CST: RADIUS: Calling-Station-Id [31] 19 "84-8F-69-A8-BD-1D"
Jan 28 2013 17:21:32.417 CST: RADIUS: EAP-Message [79] 45
[code]....
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Nov 23, 2012
I`m working on Dynamic Vlan Assigmenton the basis of end user authenticatedwhoc are part of specific AD Group in c ampus enviorment.Objective: Need to assign the vlan on switch port on the basis of authenticated users OU Group in Active Directory. Eg: There are 2 OU groups in AD, Sales and Administration. Authenticated user in Sales group should get Vlan 10 and user in Admininstration Group shoudl get Vlan 20.
Components:
Cisco 3750x/Cisco 4500
ACS Version 5.2
Microsoft AD
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Apr 11, 2013
I'm trying to use 802.1x to authenticate clients on my network with dynamic VLAN assignment from RADIUS. We have IP-Phones(powered by PoE) that only supports EAP-MD5, and we would rather use MAB(it also uses LLDP-MED for some settings) to authenticate the phones using the MAC-range from the phones vendor. The following scenario works perfect:Connect the phone and let it boot up(takes a while) and authenticate with MAB.Connect a computer in the phones data-port and let it authenticate with 802.1x(or fail and reach guest-vlan) However, the following scenario doesn't work:The computer is already connected to the phoneThe phone is then connected to the switch What happends now is that the computer is authenticated using 802.1x before the phone boots up and get's authenticated with MAB. When the phone is ready, it's authenticated with MAB and everything works. However, after a short period(let's say a minute), using `debug authentication all`, we see a "NEW LL MAC: phones mac" message(which is weird since the mac has already been MAB-authenticated), and then we are unable to contact the phone using ping. When I check `show mac address-table` it has now moved the mac from `Port Gi 0/12` to `Port Drop`. However, if I check `show mab interface Gi 0/12` or `show authentication sessions` it lists the phones-mac as `mab auth sucess `.why the first scenario works, and not the second?
The switch is a 3560E PoE 24p with IOS 12.2.58SE2. Sample of the switch-config: network-policy profile 1voice vlan 90!interface GigabitEthernet0/12switchport mode accessnetwork-policy 1authentication control-direction inauthentication event fail retry 1 action authorize vlan 60authentication event server dead action authorize vlan 60authentication event no-response action authorize vlan 60authentication event server alive action reinitializeauthentication host-mode multi-domainauthentication order mab dot1xauthentication priority mab dot1xauthentication port-control autoauthentication periodicauthentication violation replacemabdot1x pae authenticatordot1x timeout tx-period 5dot1x max-reauth-req 1spanning-tree portfast!Btw, when we tried authenticating the phones using 802.1x too (EAP-MD5), there are NO problems in any of the scenarios. However, we want to use MAB instead of 802.1x to avoid the requirement of configuring the phones with a username and password. The RADIUS response was the same when using 802.1x as it is with MAB for the phones (including device-traffic-class=voice AV-pair).
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Oct 6, 2011
now we have 2 switches: SF300-24..on one SF300-24 we config it at layer 3 mode with VLAN configuration same as following [code] And we use port 26 on 2 switches SF300-24 is trunk mode then we connect both SF300-24 switches.But on SF300-24 layer 2 cann't inderstand VLAN from Sf300-24 layer 3..How to config VLAN on 2 switches SF300-24 Layer 3 and SF300-24 layer 2?
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Mar 6, 2013
How config dynamic alp inspection for 300 or 500 series ? I find in admin guide it's no simple to do.
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Aug 7, 2011
I have Remote Access VPN users (IPsec) who are terminated on Cisco ASA 5520 (v8.2). For those users, AAA is done on the ACS. Group-policies and tunnel groups are defined on ASA. Initialy I had all VPN users defined on ASA and group policies were associated with each user. Each group policy had it’s own IP pool for users. Now, I moved users to ACS. How can I associate group policy, defined on ASA, with users group defined on ACS? Is it possible that ACS send to ASA information about IP pool for different group policy? Users will use ONE vpn profile BUT based on the Active Directory group they belong to they obtain a different IP address for each group.Can it be done ? ACS version is 5.2.
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Mar 22, 2011
I am migrating an a group of workstations that run a fire system from one software to another. The current workstations run the following info:123.123.123.xxx 255.255.255.0The new workstations run:100.100.100.xxx 255.255.255.0There is a central switch location using a GE-DSG-244 Layer 2+ Managed switch. There are two remote location using GE-DS-82 Managed Switches.The two networks must remain isolated, yet use the same fiber communications. The central switch connects to the two location using MM Fiber. From my research I believe I need to use the 802.1q standard to allow port trunking between the two switches.
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Aug 21, 2012
I am using several SG300-28 Switches with firmware version 1.1.2.0.I have dynamic VLAN enabled. As RADIUS server I am using free radius 2.1.12.Authentication is only based on the MAC address. (I configured that on the switches)On the switches I created three VLANs. VLAN100 for the authenticated clients, VLAN200 for Management interface and VLAN300 as Guest VLAN. After a wrong authentication the clients should be put into this Guest VLAN immediately (I configured this on the switches). I am using Windows XP and Windows 7 clients in my network. I did not configure any EAP settings because I just wnat to use the MAC address.
In most cases the dynamic VLAN assignment and authentication is working fine. The switch log says that the client is authenticated and the same I can see on free radius log. But in some (rare) cases the client is rejected. The CISCO log says "MAC aa:bb:cc:dd:ee:ff was rejected on port ge17" but when I look at the free radius log then this MAC address was successfully authorized.
The problem is that the client gets an IP address based on the Guest VLAN300 but after that the switch seems to "switch" the VLAN on the port and then the client is authenticated correctly on the right VLAN but the client does not request a new IP on the new VLAN. If I unplug and re-plug the LAN cable in most cases the client get the correct VLAN and the correct IP. This is happening randomly on nearly all my PCs.
Do I have to set some timers higher ? I don't think it is a problem between switch and RADIUS but a problem between communication of the host and the switch.
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Jan 6, 2013
Is it possible to disable DCA for a couple of APs and manually force the channels assignment ?
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May 16, 2013
We are working with a contractor to upgrade our network, and I heard from them that the 5596/5548 might not need the Layer 3 module for our inter-VLAN routhing. They have yet to give me an answer.
We do have a few static routes on our current layer-3, core switch too.
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Sep 9, 2012
I have a SF 300-24 24-Port 10/100 Managed Switch and I am trying to set some VLANs. The image below shows how I want it to be setup:Since the remote site goes through the Internet, making port 20 an 802.1Q trunk over the two VLANs will give WAN connectivity to VPN/E-mail.I've tried all sort of settings [ see attachments] but can't get it work.
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Nov 18, 2012
Does the 22xx Series FEX support static or dynamic LAGs between itself and a server?Imagine a server with dual 10G NICs, and I need to connect them to the SAME 22xx FEX....can I set up a LAG between the two 10G NIC ports and two 22xx FEX Host ports? Does it depend on how the FEX is connected to the parent 55xx?
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Jun 27, 2012
I got a different scenario from one of my client.My client have two different branch offices and have 50Mbps point to point connectivity between them. All users in both braches using same series of IP pool ( 192.168.224.0/24) in both branches.Both branches he had only Cisco 2960S series switches only. And in both branches he is using IP cameras. He will monitor the assets by accessing IP cameras through the browser.His requirement is, he wants to prioritize the Video traffic( monitoring through the browser) over the normal data traffic.Note: He had a single VLAN only.
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Apr 29, 2013
I've turned up a new layer 2 WAN link between two data centres and i'm having some trouble trying to logically figure out how things should be configured.As you can see from the diagram i've created, I have the link connected on port 13 on one switch and port 14 on the other. Both ports have an IP address assigned to them and they can both ping each other..
The problem comes when I need to add routes in order to get traffic flowing over the link.I added an IP address to switch 2 on the link interface (port 14) as: 192.168.4.10
I then added an IP address to switch 1 on the link interface (port 13) as:
192.168.1.10
192.168.2.10
When I tried to add 192.168.3.10, it said "192.168.3.0 overlaps with VLAN2626". This would be correct as Vlan 2626 has an IP address of 192.168.3.15.
However, if I remove the IP address from vlan 2626 and add 192.168.3.10 to vlan 2 (the link port VLAN), I would surely lose remote access to the switch. (I'm telnetting into the switch from a machine on vlan 2626).
I started to tinker with this by manually adding a route to a server in each location and seeing if I could get traffic to flow:
On server 1: route add 192.168.4.0 MASK 255.255.255.0 192.168.1.10 METRIC 1
On server 2: route add 192.168.1.0 MASK 255.255.255.0 192.168.4.10 METRIC 1
If I try to tracert 192.168.1.20 from server 2, the first hop is the default gateway instead of 192.168.4.10.
The ultimate goal is to add the static routes to the Layer 3 router/firewall, but before I do that, I need to be sure of what to add to that router (It's a manged firewall from the data centre, so I don't have access to it and I need to raise firewall change requests to get the work done, so want to ensure it's right first time.
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Sep 10, 2012
The Wireless_Employees authorization profile,assign vlan 666 for wireless employees.ISE is passing VLAN 666 to the WLC - see attachement Radius Auth-VLAN666.jpg then I look on the WLC at a wireless employee who has successuflly connected to the network, WLC is still placing him in the pre-configured VLAN 7.
1. can VLAN be pushed from ISE to the WLC (code 7.2.103) for specific user session?
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Apr 8, 2013
I was wondering if it is possible to do dynamic VLAN assignment on the Cisco Wireless Controller 5508 without using Cisco ACS but use Microsoft NPS server instead?
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Apr 22, 2013
I have enabled IP DHCP snooping on a 24 port 3560 switch (v small office) and let the database fill up, now I have added dynamic arp inspection on the single vlan and I amd getting these errors.
Apr 23 16:15:34: %SW_DAI-4-DHCP_SNOOPING_DENY: 1 Invalid ARPs (Req) on Fa0/5, vlan 1.([5835.d9b0.b9d1/172.30.5.2/0000.0000.0000/172.30.5.3/16:15:33 BST Tue Apr 23 2013])
Apr 23 16:15:39: %SW_DAI-4-DHCP_SNOOPING_DENY: 1 Invalid ARPs (Req) on Fa0/8, vlan 1.([0004.f2be.55e4/172.30.5.5/0000.0000.0000/172.30.5.8/16:15:39 BST Tue Apr 23 2013])
Apr 23 16:15:40: %SW_DAI-4-DHCP_SNOOPING_DENY: 1 Invalid ARPs (Req) on Fa0/8, vlan 1.([0004.f2be.55e4/172.30.5.5/0000.0000.0000/172.30.5.8/16:15:40 BST Tue Apr 23 2013])
[Code] .....
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Sep 13, 2012
I understand the vlans on the catalyst side of the house on 2900 to 6500 Catalyst switches.
This 7010 running nx-os 5.1(3) I did not setup, but have to manage it. Hasn't really been a proble till now.
My nexus 7010 has a Layer 2 only vlan 11. It is "Active" but the interface is "shutdown". Yet, it is passing traffic across the directly connected ports on the nexus 7010 and to other switches in my network. Vlan 11 is being set out via VTP to all my switches and things are running fine.
I need to create another L2 only Vlan. I can't seem to find any docs that indicate that a Layer2 vlan Interface on nx-os should be in "shutdown" mode as part of the setup. I do see in the docs where it has to be set "Active" as part of the process.
Is this the correct way to seutp a L2 only vlan on nex-os? Leave the interface in "shutdown" but make it "Active"?
Mystery Vlan 4 and 6
The mystery deepens. I have other L2 vlans ,Vlan4&6 that are NOT defined as "Interface Vlan4" in the nexus config, yet it is applied to GigE ports on the nexus and these Vlans 4/6is also being sent out VTP to all switches. Even weirder is that these vlans have names associated with the numbers. These are valid Vlans that were configured on the old 6509 before the Nexus was installed.
I have checked all switches, NONE are running in Server mode for VTP, all are in CLIENT. The nexus 7010 is the only device running in VTP Server mode.
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Feb 6, 2012
We have Cisco Cat4503 series L3 Switch and Cisco L2 2560 Series Switches, some of the users want to have a dynamic VLAN membership, and connecting with the network as mobile users,
can it possible and create dynamic VLAN for specific group of users.
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May 18, 2013
I am configuring 802.1X in a 3560 Switch, my Radius server is a Microsoft IAS, when I connect a station of a guest user, the guest-vlan is not assigned in the port, and I have these logs:
May 8 21:23:02: dot1x-ev:Received an EAP Timeout on FastEthernet0/8 for mac 0000.0000.0000
May 8 21:23:02: dot1x-ev:dot1x_guest_vlan_applicable: Guest VLAN not
[Code].....
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Sep 5, 2012
I've been conducting research on configuring 3 distribution switches in my network which are Cisco Catalyst 4507's to communicate with our core over layer 3. Our core switch which is already configured at Layer 3 for intervlan routing is a Cisco Catalyst 6509.
I've got the configuration portion complete and all devices are able to communicate my only question is about QoS. Do I have to configure QoS at the layer 3 interfaces for voice, if so how is that completed. We have several vlans and separate the vlans for each building by voice and data. We only configure ports on the access switches with voice vlans for QoS and we use the auto qos option on these interfaces.
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Oct 3, 2012
We are currently designing Layer 3 to the edge EIGRP solution for our customers. The network is a hybrid of collapsed core (Core to access) as well as a three layer design (Core/Distro/Access) for connectivity to the Data Centre, Internet, Wireless Blocks etc.The core of the network contains two 6509-E switches interconnected on a Layer 3 Port channel (no VSS). Access Layer switches (3750-X series running Stackwiseplus protocol) connect to the core switches over p2p routed links and Distribution layer switches (3750X stackwiseplus) provide connectivity to the Data centre, Internet, wireless blocks etc.
The access and distribution switch stacks(Cisco 3750-X) are set up with two or three member switches with uplinks multihomed to the primary and secondary core switch with each uplink included in EIGRP. In each of the stacks, one of the switches controls the operation of the stack, which will be the stack master.As the Cisco Stackwise architecture is not SSO-capable but NSF aware, all Layer 3 fuctions must be re-established during a master switch outage. To minimize control plane impact and improve Layer3 convergence, uplinks should be diverse and originate from the member switches instead of the Master switches in the respective stack. This is as per Cisco recommended design solution.The above solution can be setup if there are more than two switches in the stack. i.e. uplinks are configured on the backup member switch modules.
1.But what about stack with two switches..Which switch should be set up as the Master for a two member stack with uplinks to the core primary and secondary from each switch(Master and Backup)
2. For Layer 3 routing, does the routing takes precedene over switch failures? Say for eg. In a two member stack, the master switch with uplink to primary fails, does EIGRP provide a fast convergence to route traffic via backup secondary and does not wait for the control plane on the switch stack to converge? All the access to core links will be set up for ECMP.
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Aug 3, 2012
Is there a way to set static routes per VLAN?Example VLAN 100 sends all traffic to 192.168.1.1 and VLAN 200 sends all traffic to 10.1.1.1. (2800 Series RTR)I have 5 networks that have their own gateway to the Internet via satellite link. Those networks run over the same infrastructure on separate VLANs. They frequently send traffic to each other, which gets sent over a slow SAT link. I introduced a router to the network and would like to set all my hosts default gateway to the local routers sub-interface then have a static route that send all traffic that is not on one of my 5 networks back to that VLANs respective SAT modem to get routed out over the Internet.
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Jun 25, 2012
I have 3750 series with GIBICs ports I want to create 10 vlans with its sub-net and enable all vlans to access internet.
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Sep 29, 2012
I configure 3750 stack switch as core and 2960 stack switches as access layer switches.I connected my laptop to one of my core stack in VLAN 10 and I am pinging to one of my server in VLAN 1. What will be the minimum latency at the time of inter VALN routing
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Nov 4, 2012
we are using 3750 and 2950 switches both of them do not support vlan up to 4000 .we need vlan about 3000 .Whic cisco series switch do support vlan up to 4000.
2950
S-SW1.3(config-vlan)#exi
Proposed configuration has too many VLANs for this platform. Reduce the number of VLANs proposed.
S-SW1.3(config)#end
3750
SW1(config-vlan)#exi
proposed configuration exceeds the limit of 1005 VLANs that can be supported on this platform. Reduce the number of VLANs proposed to be within this limit.
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Jan 1, 2013
On the datasheet, product specifications are for forwarding only :
Forwarding bandwidth:
• Cisco ME 3400EG-12CS AC or DC: 32 Gbps
• Cisco ME 3400EG-2CS AC: 8 Gbps
• Cisco ME 3400E-24TS, AC or DC: 8 Gbps
Forwarding rate:
• Cisco ME 3400EG-12CS, AC or DC: 26 mpps
• Cisco ME 3400EG-2CS AC: 6.5 mpps
• Cisco ME 3400E-24TS, AC or DC: 6.5 mpps
where can I find the performance for routing (layer 3) for this product ?
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Dec 12, 2010
Am trying to do a dynamic configuration of a 3900 series router (3925 to be precise).For the software and licenses, under the IOS technology Package Licenses, what's the significant of SL-39-DATA-K9 and SL-39-SECNPE-K9? Are they really necessary for the router?
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