Cisco WAN :: Can Configure DHCP Server In 3750

Dec 13, 2010

Can we Configure DHCP server in 3750 ?  we have configure DHCP server  in 1841 router but some reason we want remove router .

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Cisco :: DHCP Server With 3750 PoE?

Feb 20, 2013

I'm trying to enable dhcp server on it. done this how to [URL] It works, but unfortunately the client takes almost 2 min to get an ip.

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Cisco :: 3750 - DHCP Server Configuration

Aug 16, 2011

I have a WCS that I use to manage 8 controllers (2 WiSM's totaling 4 controllers, and 4 more controllers at remote locations). All controllers connect to 3750 switches. The layer three interfaces for all V LAN's that are related to the wireless network are created on these switches. Each layer three interface has a helper address that points the devices in the sub net to the correct DHCP server.
 
When a wireless device requests a DHCP request I believe it gets to that server based on the relay from the layer three interface on the 3750. However, I know that the virtual interface on the controller is also requesting an address because my firewall is flooded with deny statements. The virtual interface is configured for 1.1.1.1 and so it gets blocked. I am starting to question the use of this interface considering the fact that it is getting blocked and the clients are still getting address.
 
Are both interfaces trying to act as DHCP relays? Could I setup the controllers to be the only relay (without using the virtual interface)?

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Cisco LAN :: 3750 How To Filter DHCP Packets From / To Server

Dec 27, 2011

a power analyzer in my network is sending some packets that are unexpected and incorrectly recognized as DHCPOFFERS. As a workaround, I would like to filter those packets with my Cisco switch 3750.Suppose IP_POWER_ANALYZER is the ip address, what could be the best choice

1. deny udp any IP_POWER_ANALYZER eq bootpc
2. deny udp any IP_POWER_ANALYZER eq bootpc; deny udp IP_POWER_ANALYZER any eq bootps
3. deny udp any eq bootpc IP_POWER_ANALYZER eq bootps

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Cisco Switching/Routing :: DHCP Server Catalyst 3750

May 28, 2013

I have customer who has as Core Switch one Cisco Catalyst 3750 with the IOS c3750-ipbase-mz.122-35.SE5.I know that this image support DHCP Server configuration, but I like to implementate new vlans (approx 15) and I want to know if this switch support 15 DHCP Servers.

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Cisco Wireless :: 3750 Switch - DHCP Server / Cannot Get IP Address

Jan 8, 2012

I have a 1250 AP connected to an Switch Cisco 3750. We have a SSID(v lan 1 - native) which get an IP Address from our DHCP Server(located in a Windows 2003 server). I added a new SSID in VLAN 2 and I would like no to use the DHCP Server but to make the AP get an IP Address from the pool I created in the own AP (ip dhcp pool Guest) but every time I try to connect the new v lan, it doesn't get an ip address.
 
Follow the settings of the AP.
 
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
[Code]...

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Cisco Firewall :: Can Configure ASA5510 As DHCP Server For LAN

Oct 13, 2011

I am using a fiber optic connection. I want to connect it directly to ASA5510. A WLC2504 will be connected to ASA and one Aironet AP will be deployed at first. (At this moment I am not using any Windows server but in near future I will need to deploy Windows Server 2003 in my corporate network) My questions are:
 
Can I configure ASA as DHCP server for my LAN?

Can I configure WLC as DHCP server for my LAN?

If we can configure both then what is the best practice from above two options? (I am new to Cisco stuff and first time user)

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Cisco Switches :: Configure DHCP Server Options For SMB 300?

Nov 28, 2011

I am looking for a how to configure a DHCP server for a Cisco SMB 300 series switch to obtain an automatic configuration. Currently i am using a Cisco 1800 router as my DHCP server and the DHCP pool serving the 300 series switch is configured as follows.
 
ip dhcp pool Cisco_SMB_300
network 192.168.0.0 255.255.255.0
default-router 192.168.0.1

[Code]......
 
Looking at pcaps, I don't even see a tftp request going the server after the switch obtains an IP via DHCP. The config file format is exactly as obtained from the download backup section (pretty sure its not the issue since i don't see a download attempt). Also, the SMB switch is running the latest firmware image (1.1.1.8)
 
Looking though the admin guide i did not see specifics on how the DHCP server was to be configure for the auto configuration feature to work.

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Configure DHCP And DNS On Windows Server 2008 R2?

Apr 16, 2013

I want to set up a domain for a file server and MS SQL 2005 server on my server machine and installed windows server 2008 in it.

Do I need to set up DHCP server and DNS on Windows server 2008R2 or leave them to the router to do the job?

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Cisco Switching/Routing :: 3750 - DHCP Server Doesn't Provide IP Address

Dec 11, 2012

a new LAN installation, two VSS pair 6509 core, 15 closets, with 3750 stacks. Floor 15 only, devices/hosts can ping teh DHCP server but cannot aquire IP addresses. no such problem on other floors?
 
portfast an dother parameters are intact.

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3750 - Craft Helper Addresses So DHCP Requests Go To Proper Server

Dec 15, 2012

Setting up a stand-alone WDS/PXE server.Current we have helper addresses setup to forward the DHCP requests from the different VLAN's to the DHCP server. The WDS/PXE server we are setting up is on its server. How do we craft the helper addresses so DHCP requests go to the proper server hosting DHCP and PXE requests go the WDS server?

Everything I seen on Microsoft Technet, lists using Helper Address as the recommended way, but assume both services are on the same server. Our helper address is as follows on each VLAN interface in router: ip helper-address X.X.X..This is a Cisco 3750.

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Cisco Switching/Routing :: Configure 881 Router To Act As DHCP Server?

Jul 9, 2012

Is it possible to configure an 881 router to act as a DHCP server to 4 VLAN's each with a different scopes all through a single ethernet interface? 

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Cisco Firewall :: Configure DHCP Server On Inside Interface ASA 5505

May 9, 2012

We've just started with the ASA 5505. We do run a DHCP server on the inside interface, so it is in the same VLAN 1 as all of the clients. However, we cannot get it to work.We can't use DHCP Relay, as the ASA 5505 only allows to relay to DHCP servers in a different subnet.Or do we have to move the DHCP server to a different subnet. If so, how would we configure that scenario?

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Cisco Switches :: Configure SF300 48port Switch As DHCP Server

Feb 8, 2013

How to configure SF300 48port switch as DHCP Server or not.
 
My Configuration as below
 
I have 8 vlan configure in SF300  (SVI with ip address) isit possible to configure dhcp server and how i can apply access-list to restrict with other vlans.

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Cisco Switches :: Configure SF300 48 Port Switch As DHCP Server?

Aug 23, 2011

How to configure SF300 48port switch as DHCP Server or not.
 
My Configuration as below
 
I have 8 vlan configure in SF300  (SVI with ip address)isit possible to configure dhcp server and how i can apply access-list to restrict with other vlans.

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Cisco Switching/Routing :: 3750 - Configure Syslog Server For All Of Device Logging?

Feb 5, 2012

I'm looking to configure a syslog server for all of my cisco device logging. I've had a look at CNA and can't find any options to define a syslog server for my switches.
 
What's the best way to define a syslog server and the severity of the notifications? Also, i'm looking to clear all previous Syste mmessages fon my devices?

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Cisco Switching/Routing :: Configure Two 3845 Routers To Act As DHCP Server / Relay?

Feb 14, 2012

I am trying to configure two 3845 routers to act as dhcp server and dhcp relay. Clients are connected to the router that relays all dhcp requests to the vrf instance which is used to connect it to the router wich is running dhcp server.
 
Router1 
ip vrf dhcp_dns
rd 8:1
 int gi0/0
ip vrf forwarding dhcp_dns
ip address 192.168.200.5 255.255.255.248

[code]...

So far I can see dhcp requests coming from the R1 and dhcp server on R2 replies with the dhcp offer but PC is not getting any ip.

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Cisco Switching/Routing :: 3550 - Configure Firewall DHCP Server Through 10.1.1.0 Connection?

Oct 2, 2012

Is there a way to configure a DHCP server for my internal subnet of 192.168.20.1 which is on a 3550 layer 3 switch from my 5505 ASA Firewall.My subnet of 10.1.1.0/30 is connecting my 5505 to 3550. All I'm trying to do is run a DHCP server down to my hosts. The only options on ASA 5505 is
 
dhcpd address 192.168.20.1 - 192.168.20.254 outside or inside, which conflicts with my subnet of 10.1.1.0 used to connect my internal subnet of 192.168.20.1 for the whole network.
 
When I used my router it did not need the (inside, outside) keywords and just an ip helper-address command. How do I configure my my firewall DHCP server to propagate the 192.168.20.0 network through my 10.1.1.0 connection.

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Cisco Switching/Routing :: Configure 2960 8 Port Switch With DHCP Server?

Jun 24, 2012

I need to configure a Cisco 2960 switch as a DHCP server.    The current IP address will be on a different seed than the DHCP addresses.  i.e.
 
Switch IP = 10.1.2.3, GW = 10.1.2.1, Subnet = 255.255.255.0
DHCP addresses would be 192.168.1.1 - 200, GW=???? (10.1.2.3?) and subnet would be 255.255.255.0

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Cisco Switching/Routing :: 3750 DHCP Server Handing Out IP Addresses To Client Connected To VLAN5 Interface

Feb 23, 2012

Haveing issue with DHCP server handing out IP addresses to client connected to VLAN5 interface.ISP Router>Firewall -(WatchGuard Drop-in mode) I have several 3750 switches and  one acting as a L3 switch. The L3 is configured as follow: [code]
 
If I connect a laptop to int fa1/0/10 I DO NOT get an IP address from the 10.100.0.8 scope. If I connect to another interface within the VLAN 1, I get an address from the 10.100.0.0 range.

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Cisco Switching/Routing :: Configure 3560 To Force Client To Get IP By DHCP Relay Server?

Jul 30, 2012

How to configure cisco 3560 to force the client only can get ip by dhcp-relay server ?
 
The company i am working in has 5 vlans which have been set an lay-3 switch(3560), uses the dhcp-relay server .(in svi configuration: ip helper-address X.X.X.X) well , that works ok~
 
Now , I got my problem: I need to force the client only can get ip by dhcp-relay server, that means if anyone set static IP manunally , he can't really access to anywhere (to provent anyone set static IP with malignancy )
 
I know if a h3c router , how to set this configuration n svi configuration : dhcp relay security address-check enable )
the how to configure on a cisco 3560 ?

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Cisco Switching/Routing :: Configure LACP In 3750 For Two Port Connected To Dell M6220 Server Switch?

Aug 1, 2012

We have Dell M6220 blade server that server is connected to cisco 3750 switch. I am trying to configure LACP in 3750 for two port which are connected to Dell M6220 server switch. The channel-group 2 mode  active commande is not taking then its showing the error protocol mismatch and if i run show int port-channel 2 command the port channel status is showing down. The Dell server switch is on simple mode. below i have attached the required details.

Switch#show int port-channel 2
Port-channel2 is down, line protocol is down (notconnect)
  Hardware is EtherChannel, address is 0000.0000.0000 (bia 0000.0000.0000)
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set

[code]...

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Windows 2003 Server - Dhcp Server Cannot Ping Client

Sep 29, 2011

i am facing the same problem now but am using windows 2003 server

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Server 2008 - Share Internet Through DHCP Server

May 6, 2012

[code]...

I am able to obtain IP addresses through the DHCP server for my clients and I am able to browse internet on the server 2k8.Server 2008 - Share Internet through DHCP server

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Cisco WAN :: WLC2504 Not Accepting DHCP Pools From 3750?

Dec 4, 2011

I got a set of dhcp pool in one 3750 attached to diferent Vlans in the network, the wired network works fine, you can get from any switch port across the LAN a diferente VLANs IP. In my wlc2504 I got 5 WLANs with the DHCP server pointed to the VLAN in the 3750, but I just got one set of ip when i tried to connect to diferent WLAN, without connectivity, I can see all the Ap's, and ping the VLANs in the 3750,

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Cisco Switching/Routing :: SW 3750 - ACLs For DHCP

Apr 16, 2013

We are configuring ACLs for a dhcp pool on Sw3750
 
ip access-list extended Test
permit ip any 192.168.1.0 0.0.0.31
permit ip any host 172.16.1.1
 
And, here is dhcp pool:
 
ip dhcp excluded 192.168.1.1 192.168.1.3
ip dhcp pool Name
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
 
But when a PC try to obtain IP automatically, it doesn't work.

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Cisco Switching/Routing :: 3750 - DHCP Release

May 13, 2012

i created the 10 V LAN in my Cisco 3750 switch.All other V LAN DHCP IP's (192.168.2.X - 192.168.10.X)  will be release from the DHCP server except VLAN1 . In my 3750 switch i created DHCP pool(192.168.14.X).... and i assigned to VLAN10.... but one of the client is assigned to V LAN 2(192.168.2.X)  configuration. but its getting IP from the Cisco DHCP instead of DHCP server.

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Cisco Switching/Routing :: DHCP Limitation On 3750 Switches?

Jul 16, 2012

I want to clear following things regarding Cisco 3750 switch.

1. Can I configure Multiple DHCP pool on C3750?

2. Performance effect due to same?

3. Can I resrve IP addrese from DHCP pool for specific MAC address.

4. Can I Exempt IP address from DHCP pool ?

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Cisco WAN :: 3750 Switch - Clear IP DHCP Conflict / Binding

May 10, 2013

I configured an DHCP server on cisco 3750 switch . Wher in w3750 gets connected to plain l2 switch 2960 on floor  and machine gets connected to 2960 port. [code] Below is the description of problem:
 
-> The Cisco 3750 switch is the DHCP server. VLAN 108 is named as internet vlan.
 
-> Ports in Cisco 2960 switch has been configured with "switchport access vlan 108".
 
-> There were no problems at all and everything had been working smoothly.
 
-> 3 days back, users started complaining that they couldn't access the internet. Up on troubleshooting the issue, I found out that there was an issue with the DHCP server as the computer couldn't get any IP address at all. After setting static IP address, the internet started working again.
 
If I bind IP to MAc address reservation on core 3750 switch for some time of moment it works but after that machine gets unreachable .I restarted the 3750 switch and also all the 2960 switches over the weekend, however, the issue still hasn't been resolved yet. I did issue the command "clear ip dhcp conflict *", clear ip dhcp binding * but no joy at all.

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Cisco Wireless :: WLC Integrated 3750 Upgrade DHCP Failure

Jul 20, 2011

I've been working with a client's integrated 3750 WLC running 4.0.179.11. I want to upgrade the code because it is old plus I am having DHCP trouble.  I have a couple of questions:
 
1. Is it OK to upgrade to SWLC3750K9-5-2-193-0.aes ? or do I need to go through 4.2 first ?
2. Will that code upgrade the bootloader at the same time?
3. How can I make sure there is enough flash space on the WLC?
4. Are there any special considerations to plan/prepare for?
 
The DHCP issue is failure of associated clients to get an IP address with this message found in WLC debugging:

[Code]...

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Cisco Switching/Routing :: 3750 Not Handing Out DHCP Addresses

Nov 2, 2011

Had a problem with a 3750 this morning not handing out DHCP addresses.  The following is a sanitized config of what the switch is using. [code] The IOS installed on the switch is c3750-ipbasek9-mz.122-55.SE1.bin.  What got my attention was that the sh ip dhcp pool PC showed 180 addresses being excluded.  In doing the math from the dhcp excluded addresses, only 64 should be excluded.
 
My next step was to remove the second dhcp excluded-address line above.  Doing a clear ip dhcp binding * started letting the DHCP service hand out addresses but the sh ip dhcp pool PC stil showed 180 addresses excluded.
 
It finally took removing the dhcp pool and putting it back in to drop the number of excluded addresses down to a value that matches the first excluded-address line.  Didnt see a dhcp bug in the bug database that would explain this.
 
I tried re-entering the second excluded-address line from above and saw the number of excluded addresses rise as expected.  When I negated the line, the number of excluded addresses dropped back to its previous value.

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Cisco WAN :: 3750 - How To Configure HSRP

Apr 13, 2011

The Issue we have two 3750 switches and  configured hsrp on that . Now instead of connecting these two swiches to an Intermediate common switch we have a cisco asa5520 which has 3 L3 ports of which is it possble to convert 2 ports as L2 ports and use those ports to connect to 3750 switches instead of a L2 switch.

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Cisco WAN :: WS-C6513-E - How To Configure DHCP

Feb 13, 2013

we have 4 department Finance, Marketing, HR, contracts. All are in different subnet. We need to install a single DHCP server to provide IP for all subnets.

We have one Layer 3 switch Cisco WS-C6513-E; Windows server 2003 DHCP server.

How to design the network ?

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