RV180 Question DHCP

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• Major question Dhcp on cisco switch please help!

  Hi Experts,
  One of our remote sites has Cisco 2811 router and switch 3650. The switch provides switching and DHCP PC to all customers.
  Please see attachment for more details files.
  Problem:
  After the expiry of the term of the DHCP lease (10 hours), some of the PC (Windows 7) on the remote site received Windows popup says that duplicate IP. Then, the network connectivity of the computer has been disconnected. After you restart the PC, then its network connectivity was back to active state.
  If all the computers have been placed in static mode, there is no problem.
  Please see the attached configuration of the router and Switch.
  Thank you very much

  It's strange this generally solves the problem of IP duplicate

  How to put the DHCP server on the router instead of this?

  what you get when you place an order 'show ip dhcp conflict '.

  also can you share the command 'show ip dhcp pool '.

  Richard

• RV180 need some advice/Suggestion regarding the rules of access and Services

  Hi, I expected to get some advice or suggestion with a RV180 question.  I have a cable modem connection that connects to my port WAN RV180 and we have a single static IP address on the WAN port and everything works great.  We have an internal Exchange Server, so we have a few inbound rules access allowing for ports 443 and 25.  It all works.

  This is the question that I encounter.  We have now another service internal now needs outside inside access on port 443 (https), but I already have this configuration on the router for Exchange and when I have both sense, of course, it won't work correctly because the router just takes the first rules of access and use the one that works very well for traffic Exchange , but not my other service.

  Is there another way to get this job where I can have two internal services on port 443 and the router can forward traffic appropriate to each of them since my first IP? (it doesn't really matter if I had two IP addresses because it always hits the same access list for internal services)

  All advice or suggestion would be great

  Hi, yours is a general networking, not specific to RV180 problem.

  As you have only one IP public (on the WAN port), you only have a single port 443, you can support two services outside-to-inside.

  The cheapest solution is one of the services to another port, if the service permits.

  The most expensive solution is to have public IP addresses.

• First three steps Questions with RV180

  I recently bought the router RV180. I have a few quick "getting started" questions about its use:

  1. is the "static DHCP" screen I need to use in order to reserve addresses DHCP (see attachment)? That's where I was reserving all my DHCP addresses with. I'm just that I have the correct screen.

  2. what I have to do something for my setup of "backup", or my settings will always be around every restart of the RV180?

  3. I have to run a check on the RV180 firmware update and how can I update the firmware on the RV180 (as well as the SG200-18), or it usually comes with the latest out-of-the-box firmware? If I get ahead and put a contract on the RV180 and the SG200-18 service, will I automatically receive my updates? Are numbers of reference for service contracts the same for the RV180 and the SG200-18?

  Thank you!

  Hello

  1. is the "static DHCP" screen I need to use in order to reserve addresses DHCP (see attachment)? That's where I was reserving all my DHCP addresses with. I'm just that I have the correct screen.

  Yes, this is the right place to set DHCP reservations.

  2. what I have to do something for my setup of "backup", or my settings will always be around every restart of the RV180?

  Whenever you click on save after completing a change you configuration is saved and will survive a reboot.

  If you want to save the backup copy of your file from your Setup simply go in Administration > backup/restore settings.

  3. I have to run a check on the RV180 firmware update and how can I update the firmware on the RV180 (as well as the SG200-18), or it usually comes with the latest out-of-the-box firmware? If I get ahead and put a contract on the RV180 and the SG200-18 service, will I automatically receive my updates? Are numbers of reference for service contracts the same for the RV180 and the SG200-18?

  You must manually update the firmware of the RV180.  This firmware is available here:

  Firmware RV180

  It is simply a file, you download under Administration > Firmware Upgrade.  There is no bootcode for routers (as if he was with the switch)

  You can find this in the future in the same way you SG200 firmware (because this link may change) on Cisco's Web site.

  Regarding the service contract, the part number for two of these machines will be CON-SBS-SVC2.

  Hope that helps and I will try to get to your other questions sometimes today as well.  Also since you have purchased you are of course welcome to call and get support by phone, your two devices come with 1 year of technical support, and it looks like you have found or contracts, so I guess that make only 3 years.

  Cisco Small Business Support Center phone numbers

  Thanks again for choosing Cisco,

  Christopher Ebert - Advanced Network Support Engineer

  Cisco Small Business Support Center

  * Please note the useful messages *.

• RV180 dhcp via IPSEC Tunnel

  Hello

  I have set up an ipsec tunnel between rv180 (site A) and asa5520 (site B) successful. The dhcp server to clients is on the B site. The dhcp clients request going through the tunnel, they leave the rv180 on the wan interface and arrive at site B with the wan-ipaddress from site A. The configured dhcp-relay on the website match the remote network (site B), configured in the on site A ipsec tunnel. Is there anyway that all traffic pass through the ipsec tunnel? We want it for security reasons.

  Any help is greatly appreciated.

  Ralf

  Dear Ralf,

  Thank you to reach small business support community.

  Unfortunately the relay DHCP Relay not of DHCP request to the IPSec VPN tunnel.  I hope that this answer to your question and do not hesitate to contact me if there is any additional help with what I can help you.

  Kind regards

  Jeffrey Rodriguez S... : | :. : | :.
  Support Engineer Cisco client

  * Please rate the Post so other will know when an answer has been found.

• General question about DHCP network configuration

  In the past, I've always set up printers on network with a static IP address. With the proliferation of networked printers and progress in the printer driver software, I wonder if the static configuration is always recommended and necessary.

  Let's say I have install an Officejet 6500 wireless printer configured for DHCP and it gets an address 192.168.1.7. To continue, the printer driver is installed on the computers all networked and the printer port is listed as HPxxx192.168.1.7. After a break from running, say that the address assigned dynamically changes printer 192.168.1.5, leading to the question... to will the computers still be able to print to the printer who has now a new IP address? Basically, is the intelligent print driver so that he will direct the print jobs to the new address without additional configuration? (perhaps the answer varies depending on the printer model and the operating system of the client)

  I have installed HP network printers on a regular basis in a variety of operating system environments. So the question in more specific general. I don't feel a particular problem at this stage. But when I configure network printers in the future, an answer to the question will be useful.

  Thanks in advance.

  It depends on.  On older printers a static IP address is very important on the latest not so much. It is really dependent on the platform on which rests the HP software.  HP printers currentlyon market, in theory, do not need static IP addresses.

  In addition, when you set a static IP address, I always put one outside DHCP pool.  If the range is the range (.2 a.254) I reduced the scope and then put printers outside the pool.  This way there is never any conflict.

• Question of EA3500 DHCP Client Reservesion

  Hello

  Have Win7 and XP systems in my network cable connected to the router. When the IP address of these two systems are not reserved, each computer can see other computers on the network and devices, five in total.

  A good thing that the two systems to get every time same IPs who even had not changed since I upgraded from E1200.

  When I reserve an IP address for each system exactly who they have current, both systems lose the ability to see the other computers on the network. Network shares not affected, I still can access my XP of my 7 box remote distance via RDP by computer name. WDTV Live wireless connected to the router can get/update its IP (no connection problems) but similarly that others cannot see network resources.

  I tried different ways, restarted, finally finished with device reset by pressing the button.

  The next day, I managed to reproduce the problem, but managed to return by the deactivation/activation of the DHCP server.

  Another question, I've had with an external HD connected to the router when some files have been converted to uTorrent files began from that drive. I had to use Unlocker application to be able to remove the converted files. I can just assume that because anonymous access is enabled on the external drive. No problems even when HD connected to PC USB.

  Thank you

  Firmware version:

  1.0.30 build 126544 2011-12-24 02:40

  It seems that you have configured the workgroup name in the storage of the router section to match your real working group name.  That caused the router become master of your navigation.  Change the workgroup name in the router to something else.  I use the dummy.  With a mix of XP and Vista or later on the same network the XP machine must be the master of go.

• Question of DHCP Option 50

  I understand that the DHCP 50 option is for the customer asked the IP address.

  I have 3 questions about this...

  1. the DHCP server on the router maintains the MAC--> IP mapping during 24 hours right?

  What happens if I ask a non assigned a different IP address in the 24 hour window? My request will be granted each time?

  What happens if I ask for an IP address not assigned different after the 24 hour window? I guess that my request will be granted every time in this case.

  2. always in the window of 24 hours, if the requested IP address is leased to another network device, but the device has long been disconnected,

  I get the requested IP address?

  2 do all versions of routers support this option?

  Depends on the implementation of the DHCP server. The RFC does not say how to handle 50 option. The DHCP server can but should not affect the requested IP address. It can completely ignore this option.

  So:

  How long the server retains the mapping? Depends on the server. It may or may not remove the mapping after the lease has expired (which I assume is the 24 hours, that you reference).

  Ask a different IP address during the valid lease? Depends on the server. The server may grant each time. Another server can refuse each time.

  I think it is more common to not to grant the request. Internally the DHCP server manages static IP mappings and pool all the same except the static IP mapping has an unlimited lease duration. As long as a request from a computer comes that already has a mapping (static or pool) he always attributes known IP address and the other does not.

  After the expiry of the lease? Depends on the server. A DHCP server keep the maps even after the expiry of the lease. The simple purpose of this is that if you have a fairly large pool that gets not exhausted you basically assignments to static IP addresses to DHCP clients. Even if a client releases the lease (because the computer is stopped) or the lease expires, he will always keep this information. Next time (for example, you turn on the computer after the weekend) it will always go to the same IP. But again, it is up to the implementation of the server. Other servers follow other policies and do differently.

  Address IP lease request? N ° never. The DHCP server must not assign an IP address that has been rented elsewhere. There is no reliable way to make sure that the DHCP server as other devices is indeed off. If a unit is stopped, it must release the DHCP lease. If it is not the case, the IP address is blocked until the lease expired. The only case that a transfer could occur is if the DHCP server has been reset and lost its DHCP lease table. In this case, the DHCP server does not know before granted leases.

  Supported? All DHCP servers must be able to receive DHCP requests include this option. It is the implementation of the DHCP server if the DHCP option is really accepted or not. Some servers may completely ignore this option.

• RV180 DHCP Relay

  Hello

  Apologies if Im posting in the wrong place, but I am after some help.

  What Im trying to do is:

  Internet connection - router homepage (for normal home internet) - RV180

  RV180:

  2 VLAN (1-10) - which provide IP addresses for my lab at home (DC, server ESXi)

  The other addresses DHCP "Relay" between the House 2 router devices (NAS and a PC box)

  VLan 1 is set to DHCP relay

  VLan 10 is defined on the DHCP server, configured to give IP addresses in the range 192.168.10. *.

  The home router is running OpenWRT if that makes a difference

  Is it possible to get DHCP traffic on the WAN port to VLAN 1?

  Thank you

  DMO

  Hello

  "Is it possible to get DHCP traffic on the WAN port to VLAN 1.

  No - since vlan10 and vlan1 are connected directly - and the RfC TCP/IP does not allow this - the router forwards traffic via the directly connected interface.

• Questions to address IP DHCP for assistance

  Hello, I have a few questions about the dhcp ip helper address.

  Assuming that my router has two interface of FE (0/0 and 0/1). 0/0 0/1 has 10.1.2.1/24 and 10.1.1.1/24 a.

  0/0 via a LAN LAN switch connection has a DHCP of 10.1.1.5. There's no IP helper is configured on interface 0/0. Active DHCP server serves the 10.1.1.x dhcp clients.

  We are now adding 0/1 with 10.1.2.1/24 on the router. We want to have the dhcp service to clients on this new LAN site but we will not have another dhcp on the LAN Server, and we are not set up router interface to run the dhcp server on it either.

  Issues related to the:

  1. can I configure the IP helper of 10.1.1.5 on the FE interface 0/1 with 10.1.2.1 answer on that?

  2. If so, when the client on this new LAN sends dhcp broadcast to request ip address, will be the router on FE 0/1 'route' to FE 0/0 and the server 10.1.1.5 dhcp package? I read the IP address of said "before" assistance and I know if "step" = "road in layer 3" as well as the dhcp server is not connected to the FE LAN 0/1 switch. You are simply not sure if the DHCP server must connect to both switches LAN or not?

  3. I guess this means that the DHCP Server configures two set of pools and serves both sets of clients, right? (I want to just make sure that it is my first cope with dhcp).

  Thank you for your expert help.

  Hello

  Answers to your questions...

  Your installation is like this...

  Server (10.1.1.5) DHCP-{Fe0/0 (10.1.1.1) ROUTER or gateway Fe0/1(10.1.2.1)}

  Your 10.1.1.5 DHCP server is configured with two scopes or pools to assign IP addresses to the customer requests.

  Area 1: 10.1.1.0/24 with default gateway the 10.1.1.1 value option

  Area 2: 10.1.2.0/24 with option default gateway value 10.1.2.1

  a 3 - d. consider the request actually comes from a customer on the Fe0/1 interface. Support IP address is the router to forward DHCP broadcasts to 10.1.1.5 which is the DHCP server. While sending the request, she sees what interface, the application was received and it will identify the GIADDR field accordingly. So, in this case it affects 10.1.2.1 as he received Fe0/1 of the interface and the transfer of DHCP server.

  You have to think from the point of view of the DHCP server, how and what IP address should allocate to the clients requested different networks. After receving the request, DHCP server will find the scope or the pool from which assign IP address by comparing the GIADDR field in the query and brought local default gateway values. In this example, it will match 2 scope and assigns a free IP of this pool.

  3rd-4: Yes, you are right for the 3rd and 4.

  You are welcome with more questions :-)

  All the best...

  -Ashok.

• RV180 DHCP IPv4 client to work on the WAN interface?

  Hello

  Is it the customer Cisco RV180 router/firewall support DHCP on WAN interface? What is specifically mentioned on the DHCPv6 client, however, it is not mentioned for the client to IPv4. I want to set up with my cable modem in Bridge mode accessing the WAN on the RV180 interface? So I would get the IP address of my ISP.

  Thank you

  Niels

  Sent by Cisco Support technique iPad App

  Hello Niels,

  The RV180W can certainly pick up a DHCP address from your ISP to the WAN interface, via a bridged modem. In fact, it is the default configuration. Of course, you can also change your type of connection to a static IP or PPPoE (DSL) connection profile.

  All our small business routers are certainly capable of this confiugartion. Personally, I currently use a RV180W with a cable connection. Public IP from my ISP very well address the picked up RV180W.

  All the best,

  -David Aguilar

  Cisco Small Business Support Center

  1-866-606-1866

• VLANS, DHCP, subnet, gateways and Multipathing Setup Question

  Hi, I have a House VI3 test network configured like this:

  Netgear wireless router,

  Adapter plugged into Port A1 of HP Procurve wireless game layer of 4000 M 2 switch with 802. 1 q (provides the uplink to my router upstairs that serves internet)

  VLAN by default 1 is 192.168.1.X/24

  On this switch, I have 2 ESX boxes with 4 cards each, Openfiler iSCSI target and a Windows XP Pro box running my Virtual Center.

  I have a Virtual Machine that running SBS2003 with also serves as my DNS server and my DHCP server.

  SBS2003 - 192.168.1.6

  Gateway (router Netgear) 192.168.1.1

  ESX1 - 192.168.1.10

  ESX2 - 192.168.1.11

  XP Pro - 192.168.1.50

  Well, with that of the road, my question is I want to set up a VLAN on my switch Procurve to separate traffic by default network, iSCSI and vMotions traffic.  By ESX Server best practices. to install a second Nic vKernel or SVC Nic console, they must be on a separate subnet with a defined gateway.  If I create a new vLAN for iSCSI and assign a network adapter, the network traffic will not be able to see my gateway. I also need my DHCP server to receive requests from any computer on any vLAN individual and issue a corresponding IP address.

  Now, what should I do?  If I create a vLAN Tirtiary or the second, I'm not able to see the DHCP server of these VLANS?  I can only UNTAG a port in 1 vLAN and port of marking abandon any connection to my DHCP server.  On this switch I assign IP addresses for individual VLANs, but this did not help.  DHCP isn't bradcasting across multiple VLANs. Am I missing a piece of hardware to provide ACLs or something?

  I don't know where to go from here, please help.

  Hello

  To route between VLANs, you must be a switch of layer 3, is a router configured as "a router on a stick", which is essentially a port of the switch, configured as a trunk, connected to the router that is configured with a number of interfaces, one for each VLAN so that it can route traffic between the VLANS. Now create a VLAN for VMotion traffic is fine as has no need to be routed. The VLAN for iSCSI and VLAN to the Service console will have to be sent to iSCI work properly. DHCP can work through several VLANS but need aid IP to be configured on the switch.

  Concerning

• EA6900 home network IP and DHCP question

  I have a T1 (I live in a remote area).  The T1 is delivered in an extension of ZPhone T1 network that is connected to a netopia router. The router is connected to my switch and all other network connections come from the switch. I replaced a previous router linksys with an EA6900 wireless.  I unplugged the old, dead, plugged in the new in the same port of the switch.

  Everything went well and I can connect, but the EA6900 starts on a different network address 10.x.x.x

  The netopia is located in NAT to 192.168.1.x de.100 a.199.  I put the EA6900 start at 200 and serve up to 254.  When I apply this, I get a message that the router is up-to-date, then I lose connectivity and when it reconnects, it serves up a 10.x.x.x. yet once.

  Any ideas how to get it on the 192.168.1.x network?

  Thanks in advance.

  Ken

  If you want to use the 6900 as a past or wired AP, you can turn off the DHCP server on the router, assign a static IP address to the IP address of router 6900, something like 192.168.1.50, clear all the other features on the 6900 as firewall, QoS features and what is not necessary accept for the wireless and use the 6900 wired AP. This will put the 6900 devices and any connection to it, to use the routers main host IP address pool and be on the net of sub 192.168. If you do this, connect the cable from the router main host to one of the LAN ports behind the 6900, do not use the WAN or yellow marked internet port. It is not used in this configuration.

• Server DHCP and NAT Clone Question

  I have the ea6500 and I was wondering what the DHCP server is for?

  I turned it off and everything seems to be able to connect without it.

  Am I missing something?

  Also, when I turn off clone my pc MAC addy, I can't connect to the internet. (My computer is hard wired to the router).

  What is the clone for and why can't connect without a permit?

  Thank you!

  Just like what I mentioned on my previous post that if you disable the DHCP server that router will work only as a switch & if this occurs while a computer will be able to have the internet connection.

• Question about DHCP on WRT54G

  Hi all:

  Could I use DHCP for wireless connection and assign IP private for PC for connection wiring?

  It will come into conflict with each other?

  Best regards

  Chen min

  Yes, you can. You can have the PC running static IP and DHCP on the same network, regardless if it is wired or wireless.