Dynamic vlans with multiple fallback-vlans?

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I've got a problem with dynamic vlans. Trying to figure out configuration for the topology similar to the one in the picture.
I’ve got four vlans for PCs, one vlan per department. I have to add fifth vlan (50) for devices that can be connected to any of the three switches: A, B, C. these devices need to be on their own vlan, no matter to which switch they are connected to. On the other hand, PCs connected to any port on those switches should be assigned to appropriate vlan (10,20,30 or 40).
I was thinking about using dynamic vlans with list of mac addresses of devices that need to be on vlan 50 but not sure what to do with PCs. I don’t think I can use fallback vlan as I can set up only one fallback vlan for whole network and not per switch or port.
I cannot use list of mac addresses of all pcs as there’s simply too many of them (my network is way bigger than in the picture, I simplified it only to present the idea). I imagine I would need multiple fallback vlans for different switches.
Has anyone got any idea that could help me please? Maybe there’s some other and easier way?

In new software (for Cisco switches) we provide multiple fallbacks for MAC authentication (MAB):
1. 802.1x
2. web authentication
3. guest vlan (if no supplicant on the PC)
4. auth fail vlan (if radius denies you access)
So you could keep a list of MAC addresses for vlan 50 and do MAB for these devices if MAB fails you can use 802.1x for your PCs.
This will require configuring 802.1x supplicants on all PC (Windows comes preloaded with one) and maintaining a radius of users who are able to log into the network. A lot of people use their Active directory pre-existing database as a backend to store their usernames and passwords for user authentication with dot1x.
With using both dot1x and MAB you can now distinguish easily between two different processes and use your radius server to assign vlans based upon almost anything you can think of.
-Elly

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Matthew
What is the speed of the connection from the 4500 to the ASA and what is the combined speeds of the internet connections ?
You definitely don't want to do all the inter vlan routing on the 3750. You could connect it up as shown in your diagram but leave all the routing between vlans on the 4500s. Then you -
1) connect the 3750 to the 4500 using a L3 point to point link
2) connect the 3750 to the ASA using a L3 point to point link
3) do PBR on the 3750 interface connected to the 4500 for traffic coming from the 4500.
If the 4500 supervisor/IOS version doesn't support routed links on that end just use an access port in a dedicated vlan ie. no other ports in the vlan and create a new SVI for it.
You would need to update your routing to reflect the next hop on the ASA, Meraki, 3750 and the 4500.
Disadvantages are -
1) you only have fast ethernet ports on the 3750 so if the combined internet speed is greater than that then it will be a bottleneck.
2) it is a single point of failure ie. if it is lost all internet via both connections is lost.
The alternative would be to not have the 3750 in the path but connected to the 4500 via a trunk link and then route just vlan 160 and 180 on the 3750 ie. move their SVI(s) onto the 3750. Then the 3750 could have a direct connection to the Meraki device and point the default route that way (no PBR needed). The trunk would only allow those specific vlans on it. This would mean a failure of the 3750 would not mean ASA internet lost but it would mean loss of connectivity for the two vlans routed on the 3750.
You would need to add routes to the Meraki for return traffic plus routes on the 3750 and 4500 for inter vlan routing.
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2) more importantly though i suspect you are running HSRP between the 4500s for the client vlans and moving the SVIs onto the 3750 means a single point of failure for those vlans.
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Jon

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Hi.
I have a dynamic page, with a bind variable :v_day. On the customization screen the user can select one or more days of the week, or all days. I use this also in a report and then it works ok. In the where clause i use:
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Hi.
I have a dynamic page, with a bind variable :v_day. On the customization screen the user can select one or more days of the week, or all days. I use this also in a report and then it works ok. In the where clause i use:
and rtrim((to_char(date_time,'DAY'))) IN :v_day
Date_time is a tablecolumn (date).
When i add this line in the select script from the dynamic page, i get error:
: ORA-06550: line 1, column 2443:
PLS-00103: Encountered the symbol "" when expecting one of the following:
The symbol "(" was substituted for "" to continue.
ORA-06550: line 1, column 2606:
PLS-00103: Encountered the symbol ";" when expecting one of the following:
. ( ) , * @ % & - + / at mod rem <an exponent (**)> and or ||
The symbol ")" was substituted for ";" to continue.
ORA-06550: line 1, column 3236:
PLS-00103: Encountered the symbol "" when expecting one of the following:
The symbol (WWV-11230)
Critical Error in wwerr_api_error.get_errors! SQL Error Message: ORA-06502: PL/SQL: numeric or value error: character string buffer too small (WWV-)
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SORT itab.
Extras:
1. ... BY f1 f2 ... fn
2. ... ASCENDING
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I'm designing my actual WiFi service for this "Shopping Mall" to retails.
Each of retail shop should own his AP inside their own shop. The AP should ONLY broadcast his own SSID such "Starbucks-WIFI". Each shop sholud not be able to hook into the other shops network.
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If I have 100-500 customers/retail shops. Can I achieve my goal with a ginven WLC8500?
How many SSID can be actived at once?
How many AP group can be configured and turned on at once?
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Hi Andrew,
I don't have more information about your network so I will try to much your configuration from your post
let's say we have this configuration :
1. Create Vlan 10 and assign on SVI IP address 192.168.10.254 /24
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5. Create Vlan 202 and assign on SVI IP address 192.168.202.254/24
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SubnetMask : 0.0.0.0
Remote IP GW :192.168.10.1
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Hope I was clear
Please rate this post or marked as answered to help other Cisco Routers
Greetings
Mehdi

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Dynamic vlans with multiple fallback-vlans?

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