Cisco Switching/Routing :: 3750 - Configuring Multiple VLANs For Single Port
Apr 11, 2012
I would like to configure a 3750 switch port to be able to use two vlans. I know you can do this with a voice and data vlan, but what about two data vlans ? Say I have two devices, one on a 10 subnet and the other on a 172 subnet, but i only have one wall jack for both devices to plug into. So I use a mini switch to connect both devices and connect the switch to the wall jack; and of course this all leads back to one switch port. When I go to enter the switchport access vlan 172 cmd, how would I also make it so the device on the 10 subnet could route out ?
3750 can not support multiple subnets in it's DHCP server pool config.
Is this an issue that can be fixed with a different iOS or is there a different Cisco switch that I can replace the 3750 with that will handle multiple subnets within an individual pool?
Can you configure a Cisco 1941 to use an 8 port EHWic module and the 2 onboard GE ports in a single LAN?
I've discovered you can't have the on GE ports associated with a VLan, and I'm when I've previously researched for a solution, bridging was mentioned but I cannot seem to get it to work (or completely understand it)The reason I would like to use all 10 ports on for the LAN is becuase I have 10 devices I need to connect to the 1941?
I'm trying to setup a port on a catalyst 3750 so it will pass traffic for 2 vlans. It connects to a (watchguard) firewall which I've configured with a primary IP (for vlan 27) and a secondary IP (for vlan 29).
However I can't seem to find the correct commands to enter on the cisco switch port (I've tried a variety).
FYI the current configuration is... interface FastEthernet1/0/38 description ## Connection to WG vlan27 and vlan 29 ## switchport trunk encapsulation dot1q
I have two 1142n LWP ap converted into standalone, as client doesn't have any controller there. They just want to extend their network via wireless.
L3 switch (trunk port gig 1/48) -----> connected to AP1 L3 switch (trunk port 2/48) -----------> connected to AP2
client is looking for 3 vlans on the floor ( users might multiple vlans might associated same AP ). They have a dedicated DHCP/DNS server and he will be configuring 3 vlans on L3 switch with correct ip helper address on SVI interfaces.
I'm i allowed to created 3 SSID's on 1142n standalone AP ?
What would the various optiosn to achieve this requirement ? Is there any simplest way to achieve this ? Do i need to go for 802.1x ? I remember client told their users are authenticating by using AD for wired network. This is their first request for wireless environment
I read from this forum some discussion about the WLC VLAN Select feature. [URL]. I see that you can use this feature to have multiple VLANS (interfaces) to map to the same WLAN (SSID).
What I try to learn is under what scenarios would people need to have mutliple vlan mapped to single SSID?
In my environment, I have 50+ AP int he campus on 20+ Cisco 4500 switches. I have single WLAN and it is mapped to one subnet. All wireless users would be on that subnets, whereas wired users are on 20+ subnets of their own.
Nexus infrastructure is pair of N7K switches, with dual homed 5K/2K devices connected, links use vPC. They want to extend vlan's from the 5K/2K side across a L2 path into another DC, this path is only connected into one of the N7K switches, call this 7K switch A.I'm concerned that packets from the 5K/2K side back to the remote DC could get dropped due to the vPC loop dectection process. If a packet from the 5K/2K side traverses the path into the same N7K (7K switch A) as the L2 extension, I dont see a problem. But, if the etherchannel load balance in the 5K sends traffic to the packet to N7K B, in order to get to the L2 path extension to the remote DC the packet gets forwarded across the vPC. My understanding is that this packet will get dropped by N7K A as its local L2 path to the remote DC is up, is this the case?I see a solution is to plug the L2 path into a 2K, but before I suggest this is my understanding of the loop detection process correct?
Here is what I have. Windows Domain Controller running DHCP with configured scopes.I have one ASA5510 And 4 HP Procurve switches with VLANS preconfigure from vender.
Changes needed to make to the DHCP Server (AUSPDC) in order to get things working with the new switches.
1) Configure 3 new DHCP scopes on your DHCP server.
a) scope for 10.2.201.x/24 to serve LAN employees and give them a gateway address of 10.2.201.254.
b) a scope for 10.2.202.x/24 to serve WLAN employees and give them a gateway address of 10.2.202.254.
c) a scope for 10.2.203.x/24 to serve WLAN Guests and give them a gateway address of 10.2.203.254.
I just upgraded and decided to go with the VLAN configuration. None of my VLANS can get out to the internet or each other due to I think My ignorance in configuring the firewall.The PC's are getting proper IP address but they cannot get out or to the other VLANs. I tried to duplicate what is working for VLAN1 but it is not working.
I recently set up a Cisco 881 to cover a small business network. The router is currently set up and working as expected. We recently decided to move to VoIP phones and here is where I'm running into some issues.
First an overview: We run a network with a cable internet WAN connection, this connection is DHCP, however we have a static IP through our ISP. We also have a block of 30 additional IP addresses for one to one mapping as we need them. The new VoIP system is being run over T1 lines throughout the township (we are a municipal organization) and the VoIP system is being run to about 5 buildings in the township.
This brings me to the topic of VLANs. As the phone engineer explained it to me, there is a network set up over the T1 that allows the VoIP equipment to talk to one another and operates all of the VoIP phones on one network. The equipment that is being installed at our building connects to the network over the T1 and "talks" to the other equipment on the network. The engineer wants to create a VLAN and run it on ports fa1 and fa2, with the fa2 port being connected to the actual "MPLS" (their term) that connects to the T1 and into the cloud, and the fa1 port connected to the internal phone switch.
TLDR; The problem is this: When we attempt to set up the VLAN on ports fa1 and fa2, we have no connectivity with the other units in the external VoIP cloud. Pinging while directly connected to the "MPLS" yields successful pings, while pinging from the router with the "MPLS" connected to fa2 yields failures. I'm going to post the running config below, I feel like what we're doing should be working. I asked around about subinterfacing, but others seemed to think this was not necessary.
ROUTER CONFIG Building configuration...
Current configuration : 4909 bytes ! ! No configuration change since last restart version 15.1
We have a stack of switches that is at the max number of members allowed in the stack. Problem is we are running out of port density and need to add more ports. So instead of adding a whole new stack I would rather replace 2 of the 24-port swicthes with 48-port switches.
If the two 24-port swicthes we are removing are stack members and neither of them are the stack master, I should be able to replace the 24-port switches with the 48-port switches without bringing the master offline? If the new 48-port switches are running the same IOS version as the current 24-port swicthes, they should add themselves to the stack?Would I have to tell the new 48-port swicthes what switch numbers they are replacing in order for them to be added to the stack since we are at the max number of members?Also since the 48-port swicthes are replacing 24-port switches will the master give the 48-port switches the configuration for only the 24-ports?
I would like to know if it is possible to assign a 3rd IP address to my end user vlan. Basically the 45xx acts as my end user gateway and has been confirgured as below
interface VlanXX description Main Vlan ip address 2.X.X.X 255.255.255.0 secondary ip address 1.X.X.X 255.255.252.0
[Code].....
Here, due to IP address exhaustion in my end-user network, i want to add one more subnet X.X.X.X/22 to my network and assign one IP more from this range to the above vlan to act as the gateway IP.
Switch: SG500 VLANS: 1 (default) xxx.xxx.0.0/24 network, 150 (device management vlan) xxx.xxx.150.0/24 network I am plugged into port 1. This is a trunk port with VLANs assigned as follows: VLAN 1 (Default) - UntaggedVLAN 150 (dev mgmt) - Tagged Device is plugged into port 2. This is an access port with the following VLAN assigned: VLAN 150 - Untagged Why is it I cannot communicate with the device on port 2?
I have a above said switch at my remote office (600KM) which is connected with L2 Point to Point leased line. Both the ends I have Cisco 3950 catalyst switches with Vlans configured at both the ends. Now, for obvious reasons I should remove the other end 3950 switch and replace with Cisco 2950 switch. The other end 3950 is having 4 Vlans configured on 4 ports. Now my requirement is, I should configure 3 Vlans (one for P2P, one for 10 Desktops and one for to bring traffic from other network).
I have a a hardware server running a VM hosting virtual servers which are all on different VLANs. My challenge now is to configure the switchport that the server is connected to, to see all the VLANs needed by this VM. The VM has an IP that is used for managing the server VMs which is on a different VLAN also.
My switch is a 2960 switch and it is presently trunked from the core switch.
I have a stacked Cisco Catalyst 3750 configuration that currently has one V LAN configured. VLAN 192 - 10.192.0.0/16
The Catalyst has an ip on this range of 10.192.0.1. I would like to configured a few more V LAN's to be able to run some more network ranges through this device. Would it be a case of just adding the V LAN's to the master and then configuring an IP for each V LAN within the inter-v lan routing section? Some V LAN's will require access to each other but not all.
I was assigned a task to configure an SG300-28P to have 3 different vlans.Now on VLAN1 their will be only one device configured with static IP 192.168.0.230,On the other 2 VLANS there will be a separate router connected on each one of them and will also act as a DHCP server.
I am aware that private-vlans are not supported on edge switches like 2960 series - so my question is would it be possibel to ceate private vlans on say just the core switch which would be a 3570 or 4506 that supports private vlans and then just trunk these to the edge like normal vlans?
what I need to achive is to have edge port not able to communicate to each other even across switches - which cannot be done using 'protected' port so need the private vlan feature
I have to put an ACL Firewall in front of a public IP range.There's no routing so I want to do it with a transparent layer 2 Firewall. I found this document which descibes exactly that feature I need: [URL]
It seems to be a feature introduced in IOS 12.3.
My Questions:
1.) is it possible use this transparent firewall feature with the 3750 Switch instead of a "normal" IOS-Based router?
2.) I've seen there is no IOS 12.3 for the 3750 but rather 12.2 (currently installed) or 15.0.1. Is this Feature included in 15.0.1?
If the feature described above is not available, is there any other way to achieve my goal?
I'm looking for switches that support single mode fiber connections and would like to know if "WS-C3750-FS-S Catalyst 3750 24 100BaseFX + 2 SFP" and "WS-C3750G-12S-S Catalyst 3750 12 SFP" can serve the purpose?
I am troubleshooting a fiber connectivity issue.Now I have two switches, one is 3750, and another is small biz 300 series switch. Both switch has a single mode smf gbic. Now I have two swtiches face to face and connect with a single mode cable. Do you think if I would get a link light on? Both ports are no shutdown.
I need to create a firewalled segment that not only separates hosts from general population, but also from each other. The solitary confinement of firewalled segments.I know that I could create a bunch of sub-interfaces, one for each host or group that needs to be isolated, but I'd really rather not have to do that if possible. 1) It could become a management nightmare between ACLs and sub-interfaces and 2) it's a waste of IP addresses.s there any way that I can create a bunch of separate VLANs behind the firewall and have them all terminate at the firewall, using a single firewall IP address for the gateway?
We need to give differentiated internet access to three VLANs. Each one of this VLANs is used for totally different purposes, so traffic between the VLANs is not allowed. Each VLAN has its own internet access provided for the data center using one fast ethernet connection.
We're thinking about using cisco 2911 for Internet access, VPN and firewall. I suppose that best option for VLANs is using Catalyst 2960S or a swithing module for the 2911, but these two options are too expensive for us. We're thinking about using swtiches from the SB series (maybe a SG-200).
We're totaly newbies to VLANs so we have many doubts. This are our questions:
1) The 2911 has three on board ethernet interfaces; we have three VLANs and three internet connections, so we need to use HWICs to get three more ethernet ports. That's right? 2) We need three HWICs or there is some kind of HWIC with more that one ethernet interface? 3) The routing solution is to assign static routes in the 2911 for each interface connected to a VLAN through a 2911's interface connected to internet? 4) Simply connecting three different router interfaces with three different switch ports, each one of them assigned to one of the three different VLAN, are we going to get internet access for all devices in those VLANs? or do we need to configure something else like trunking, VSIs...? 5) Can we achieve our goals using the SG-200 switch? 6) We have the chance to use older routers, is this possible? We're specially interested in knowing if a 1841 or a 2801 router could be used for this setup. 7) This is not a production environment so we can use refurbished equipment.
We have a customer that is relocating thier headquarters. They have a temporary requirement to bridge multiple vlans or a router T3 link to the new location as they cannot change the IP subnets. Setup is 3560 switch connecting to a 3845 then T3 to remote 3845 and 3560. I need to bridge multiple VLANs. I have seen a good example on how to do it over sonet but I don't see how to translate that to an HDLC or Frame Relay encapsulation for the T3 Link.
As per my attached diagram, I have three switches (Cat 3560-E and couple of Cat 2960-G)
Each PC is on different vlan PC -1 on vlan 100 PC-2 on vlan 200
I need to connect PC-1 and PC-2 to the server. Server has no fixed vlan and can be changed.
Restrictions:
1) can’t change PCs vlan assignment. 2) can’t add 2nd NIC in the server.
I’ve tried private vlan but it requires separate physical ports for host and/or community vlan and somehow it did not work. I could be wrong Trunking using dot1q enabled on port 2 on all switches and connection works fine (server to PC-1 or server to PC-2) by enabling switchport access vlan 100 or switchport access vlan 200. However I need port 5 on switch-1 to respond to vlan 100 and 200.
Currently we have an Ava ya IP Office switch running on the same network as our PC clients. I would like to seperate the two network into 2 V LAN's.
We have a mixture of Catalyst 3750 switches and some older 3500 models.Where do I start? Should I leave the PC's and servers on the default V LAN and just move the IP handsets?
I am looking for a way to create different routing policies for vlans on a 3750 table.
My set up is
Clients----------- 3750 -------------- ASA ---------------Servers | | | Internet Routers
What i am trying to do is on the 3750 to route private networks to my ASA on different subintefaces and all internet to my internet routers . Each VLAN has a different GW for the internet. On some case i have the ASA as a default gateway. ASA default default route is 3750 where i need the internet traffic to be spllited on the proper Boarder router.
I have a Cisco SG200 26 Port Switch, 2 Cisco WAP4410N Access points, and a VLAN aware Router. I have created 4 VLAN's. For the sake of this conversation lets call them.
The Access points are capable of doing V LAN tagging so I plan on having them tag a guest network as V LAN 101. That can get sent to the V LAN aware router and out. No problem. I have some devices, or management pages that I don't want accessible from the general network. (Intel V pro KVM, Remote Management Cards, AP Config Menus, Switch config menu...) . I need to be able to take a V LAN unaware device, plug it into port 1, and have it communicate with V LAN 98, 99 and 100.
Does Nexus 7K support Multiple VDCs sharing ports on a single line card. One of our cisco parnter engineers stated that cisco doenst recommend using same line card for multiple VDCs.The second VDC (Non-Default VDC) will be used four our Outside, and DMZ Segment, and to phyiscally segregate our Firewall from our Internal/Inside Core Switch without using a physical DMZ Switch.I know Cisco used the Nexus in this way in their PCI DSS 2.0 Compliance Document. Module is N7K-M148GT-11L
Mod Ports Module-Type Model Status --- ----- -------------------------------- ------------------ ------------ 1 48 10/100/1000 Mbps Ethernet XL Mod N7K-M148GT-11L Mod Ports Module-Type Model Status --- ----- -------------------------------- ------------------ ------------ 1 48 10/100/1000 Mbps Ethernet XL Mod N7K-M148GT-11L
