1
vote
1answer
83 views

Shouldn't we exclude a static IP from the DHCP pool?

In my office, I have a printer with static IP 192.168.0.254/24. Normally, it should be excluded from the DHCP pool in the router. So I just set the DHCP pool to be in the range of 192.168.0.2/24 - ...
0
votes
0answers
117 views

cisco SG-300 switch won't add Option82 during dhcp relay

I'm trying to get my SG300 to insert option82 information into relayed DHCP requests. switch#show ip dhcp relay DHCP relay is Enabled Option 82 is Enabled Maximum number of supported VLANs without ...
1
vote
0answers
205 views

ip-helper forwarded DHCP request not reaching DHCP server

The situation--I'm trying to centralize our DHCP services to a single Windows 2008 R2 Server (we're switching to L3 switches that don't provide DHCP services). We currently have Cisco routers at ...
-1
votes
1answer
70 views

Access Control Lists & DHCP

Please take a look at this image right here. In the image above you can see a virtual netwerk simulation program (CISCO Packet Tracer 6.0) where I'm trying to setup a network and secure it. However ...
0
votes
1answer
264 views

VLAN & WiFi & DHCP with Cisco SG200

I'm trying to configure a small business network with one Cisco SG200-26, a Linux server and two TP-Link TL-WA801ND. I have set up the APs to have two different SSIDs, Public and Staff, and have ...
1
vote
1answer
432 views

Setting ip helper-address to a broadcast address, bad idea?

Info: A number of vlans running on a 16 bit subnet All DHCP servers are on the same subnet (10.1.0.0/16) All switches and routers are Cisco If I was to set the ip helper-address in our ...
0
votes
2answers
191 views

ASA 5505 outside access for clients with dynamically assigned IPs, no outside access for clients with static IPs

We have an ASA configured to access the internet, which works fine for clients who have an IP address assigned by DHCP, but not for clients with manually assigned IPs. For instance, with the DHCP ...
0
votes
2answers
495 views

Switch sending DHCP packets to wrong VLAN

I have a basic remote site with a Cisco Catalyst 2924XL switch. There are 2 VLAN's at the site: 1 Default 2 Wireless There is a single server connected via a single ethernet cable, VLAN 1 is ...
0
votes
1answer
371 views

Windows 7 PTR records with Cisco DHCP server

I would like to have my windows 7 clients register their own PTR records since I use a Cisco DHCP servers. DNS is Active Directory integrated. How can I go about doing so without setting up a ...
1
vote
1answer
87 views

Cisco SA520 to Adtran 1234 no DHCP transfer

I am trying to set up a Cisco SA520 to run DHCP on my network. I have a vendor provided switch, the Adtran 1234, and it provides DHCP for our phone systems on VLAN 200. I do not have access to the ...
0
votes
2answers
497 views

Cisco WLAN Controller not pushing out DHCP addresses, what else could it be?

On our Cisco WLAN Controller web interfaces, in Controller > Interfaces, I have made a new interface with these settings: VLAN Identifier 202 IP Address 172.16.202.1 Netmask 255.255.255.0 Gateway ...
2
votes
1answer
212 views

Cisco ASA 5505 network route for static IP hosts

I've configured my internal VLAN using the most basic settings where ports 1-7 are assigned from a pool of addresses in the range 192.168.15.5 -> 192.168.15.36. These hosts are given access to the ...
1
vote
1answer
657 views

DHCP forwarding behind access list on a Cisco Catalyst

I'm having some trouble with forwarding DHCP from a subnet behind an access list on a Cisco Catalyst 4500 switch. I'm hoping somebody can see the mistake I'm making. The subnet is defined like this: ...
-1
votes
2answers
296 views

Mixing Static and DHCP addresses on Cisco WRVS4400N

I am setting up a small network at work on sunday. (Work is still a restaurant, haven't gotten a tech job yet.) I will deploying a server, a new terminal and redoing all of the existing, sloppy ...
0
votes
0answers
192 views

Cisco ASA DHCP clients not routed

I got a Cisco ASA 5505 (8.4) , I got a Wap 200 sitting on a port as an AP. Sometimes (wireless) computers getting IP's from the ASA DHCP server cant get on the internet. Configuration looks like ...
0
votes
1answer
113 views

Configuring Cisco DHCP Server Multi-Homed Static Leases

I have a network managed by a Cisco router with DHCP. The network is used by some embedded software developers who use kit with fixed IP addresses. We'd like to configure their machines to use DHCP, ...
3
votes
1answer
359 views

Moving to DHCP relay with our Cisco routers and Windows 2008. How to transition smoothly?

We currently have a pretty simple setup. We have a 2008 Windows Server using DHCP for our clients. We have a remote site that has 10 people. The remote site currently get their IPs from the router, ...
1
vote
1answer
835 views

Stupid question - how do you get dhcp scope **information** from a cisco device?? (IOS 12)

This has got to be the dumbest question I've ever asked, but I can't seem to find an answer online or in Cisco's docs, so here goes. I'm trying to track down devices and network info on a rather ...
0
votes
1answer
198 views

Debian Stable - Routing problem

ADSL Router: Cisco 877 (172.16.0.254) PC1 (172.16.0.10) to port1 of router PC2 (172.16.0.20) to port2 of router Server, 2 NICs, eth0 to port0 of router. (172.16.0.240) Everything is OK with the ...
1
vote
0answers
724 views

Cisco ASA - DHCP Relay doesn't seem to be working consistently

I'm having an issue where some users on one of our DMZ networks aren't getting a DHCP address from the Windows DHCP server on our internal interface. Being that not everyone is affected is making ...
0
votes
1answer
1k views

How to properly add guest essid to cisco AP and asa5505

I have an ASA5505 configured with an inside and outside interface and DHCPD for the inside interface. Currently I have a cisco AP (forgot the model) broadcasting only a single essid for the internal ...
6
votes
1answer
5k views

Why would Windows Server not respond to DHCP DISCOVER?

My network was working just fine and I broke it. There is a Cisco 1711 router which was configured to hand out DHCP leases to the client PCs. I have a domain controller (Server 2008) on the same ...
1
vote
2answers
649 views

DHCP Scope, subnets, unsure

In my network, I have three remote locations that use different subnets then the main location. They are connected to the main location through cisco ASAs. they are as follows: 192.168.0.1 location ...
0
votes
1answer
166 views

Deny DHCP relay by corporate security policy

I've been presented with some odd "security conventions" in a large company I'm contracting with and am trying to get some perspectives on them. I need to build a number of servers virtualization ...
0
votes
2answers
352 views

Can I replace a router and DHCP server without disrupting traffic?

I have a device which acts as a router and DHCP server. I'm replacing it, and would like to minimize down time. If I unplug it, and plug in a different device with the same IP, will all the PCs ...
0
votes
1answer
521 views

Cisco 2911 - problem with DHCP

i am configuring DHCP daemon on Cisco 2911. At some point i assigned address 192.168.50.50 to one box (using MAC address 'relation'). When I wanted to saved config - I got warning, that address ...
2
votes
3answers
3k views

Why isn't my ip helper-address helping?

I have a hub site with a Cisco 2811 and several remote sites, running a mixture of Cisco 851 and 871 routers configured for site-to-site VPN. I am in the process of adding DHCP scopes and DNS zones ...
1
vote
2answers
147 views

Bootrequests coming from Cisco Switch

I have two Cisco switches that are sending out DHCP BootRequests and they're hitting my firewall about once a minute or so. What is it trying to do? How can I stop it?
0
votes
2answers
517 views

Migrate DHCP from Cisco to Windows 2008

Is is possible to seamlessly migrate from DHCP on Cisco routers to a Windows server? All my searches give me tips on migrating from 2003 to 2008 DHCP but nothing on Cisco to Windows.
1
vote
2answers
329 views

Change DHCP discover frequecy on CISCO?

Is it possible to change the frequency that a CISCO router sends a DHCP discover packet? Or is there a way to poke it and make it request one?
0
votes
1answer
1k views

Cisco IOS: One SSID doesn't pull from the correct DHCP pool

I have 2 SSID setup in my Cisco 881W router. Our internal ssid pulls from the right DHCP pool (wpool), while our guest SSID does not pull from the right pool (gpool) Here is the router config ! ! ...
2
votes
2answers
10k views

How do I combine static and dynamic DHCP leases on a Cisco router?

Basically, what I need is super similar to the unanswered cisco forum question below: https://supportforums.cisco.com/message/3139749#3139749 I have a Cisco 850 Series router. I have configured a ...
1
vote
1answer
792 views

Configuring NAT and static IP on Cisco 877W

I'm having trouble setting up a static IP reservation on a network. What I want to do is assign IP 192.168.1.105 to MAC address 00:21:5d:2f:58:04 and then port forward 35394 to it. If it helps, ...
3
votes
2answers
2k views

logging dhcp leases to syslog server on cisco router

Is there any way of a cisco router acting as a dhcp server to record the leases of its clients to a syslog server? I'm currently using the DHCP server database agent feature to record the leases to a ...
0
votes
1answer
787 views

Windows Vista DHCP bug, arp authorize, isc dhcp, workaround

I am trying to find a workaround for the Windows Vista Force Broadcast bug with ISC DHCP and a Cisco Router. The problem is not windows vista trying to obtain an IP address from us that works fine ...
1
vote
2answers
1k views

What's the purpose of setting the static IP entries in a Linksys RV082 router?

I'm wanting to configure our Linksys RV082 wired router as our primary DHCP server and then have our Linksys WRT54G wireless router as a secondary DHCP server. My plan is to have them serve different ...
0
votes
4answers
656 views

DHCP/Network problems

We've got a problem with our network here but first I'll give a bit of background info: DHCP running on a windows server 2000 box is configured to hand out 2 IP Ranges 10.25.104.xxx and 10.25.106.xxx ...