Static DHCP Binding

Hi Team,I have a problem.I need your assistance on creating manual binding on Cisco IOS v12.2.I
have more than 10 vlan with dhcp pools configured according to the
vlans and their network range. There are several host that require
manual dhcp mappings but, i'm failing to find a way to create a bind
file for the manual entry.please assist.thanks,elly
Hi Elly,
Check out the below link for DHCP static Mapping
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t11/feature/guide/gtdhcpsm.html
Hope to Help !!
Ganesh.H
Remember to rate the helpful post

Similar Messages

Does 3550/3560 support static dhcp snooping binding?

Hi All,
I'm currently studing DHCP snooping.
Just found there is no 'ip dhcp snooping bindg' syntax on 3550/3560, Is there any way to add static dhcp snooping entry?
If there is no way, and the switch intruduced ip arp inspect and ip source guard, and a untrust port connected to an end host with static IP address assigned, in such situation, is it right that I have to add static 'ip arp inspection filter' and ' ip source binding' to makes the end host can send packet out?
Thanks for any comments.
Regards,
Yi

check the following link for configuration of DHCP snooping
http://packetlife.net/blog/2010/aug/18/dhcp-snooping-and-dynamic-arp-inspection/
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/snoodhcp.html

Dhcp binding shows same device twice

I am trying to assign a static IP to a radar on my network. The mac address is 0100.08de.0000.00
I have the following in the running config:
ip dhcp pool radar
host 10.1.30.176 255.255.255.0
hardware-address 0100.08de.0000.00
when i enter show ip dhcp binding
the mac address shows up twice on the list
10.1.30.106 0100.08de.0000.00   aug 29 2014 automatic
10.1.30.176 0100.08de.0000.00 infinite         Manual
It appears the radar is receiving a dhcp lease rather than the static address I want it to take. I can ping the radar on 10.1.30.106 not 10.1.30.176.
Why won't the radar accept the .176 ip?

Hi
The best way is to first use exclude command and then try client identifier. You can use the steps below:
ip dhcp excluded-address <ip address you are trying to get rid of the lease from>
then instead of hardware-address, try using client-identifier
ip dhcp pool STATIC
host 10.1.130.176 /24
Client-identifier xxxx.xxxx.xxxx
Do ipconfig /release then ipconfig /renew in command prompt and it will bind the IP to the computer's mac address. you can later do  "no ip dhcp excluded-address" to make sure the IP add held to the computer.
Or you can also try directly these commands:
ip dhcp pool STATIC
host 10.1.130.176 /24
Client-identifier xxxx.xxxx.xxxx
Thanks & Regards
Sandeep

All STATIC DHCP Assignments wiped out

Out of the clear blue sky, my Verizon Fios Router (the new Gateway G1100) suddenly had none of my static DHCP Assignments. They all vanished! I have no idea how, but on January 3rd, I had a fully functioning router with everything set the way I want, and I had a backup of the settings.
Today, I'm trying to remote in to some PCs on my lan and their not responding. Well of course they're not, they have new IP addresses assigned dynamically because my entire address reservation entries were gone!
What the hell? Best guess I have is VERIZON pushed a firmware update that screwed me and never told me. The fact they can push updates at their whim kills me! I'm stable, don't push me jack S%$#. Don't fix what isn't broken. Notify me, let me opt in!!!!
I'm so hating my switch to verizon!
Has anyone else had this happen?

Verizon is pushing a firmware update to the Quantum routers. It adds useful functionality to the router. See this thread for the details:
http://forums.verizon.com/t5/FiOS-Internet/Fios-Quantum-Gateway-1-1-Enhancements/m-p/774233#M54060
My router was updated yesterday. Unfortunately, my router lost it's static DHCP assignments as well. I had even saved my router config prior to the upgrade as I was concerned about loosing my settings. A restore of the router config after the update did not recover my static DHCP settings. I'm not sure what else wasn't restored.
While I do like the improved features that the new firmware provides (Guest WiFi is a big deal for me), I too am disappointed in how this upgrade cleared out some settings and how we users have no control over the process. I've heard that we're supposed to receive an email about the upgrade, but I never got one.
Good Luck.
If a forum member gives an answer you like, give them the Kudos they deserve. If a member gives you the answer to your question, mark the answer as Accepted Solution so others can see the solution to the problem.

RV180W with 1.0.2.6 Firmware - Static DHCP problem

Today I installed the 1.0.2.6 Firmware on a RV180W. I only have now two problems regarding the Static DHCP support in the GUI.
1. Via the Networking > LAN (Local Network) > Static DHCP I have no buttons to Add a new static Lease.
2. Via the Networking > LAN (Local Network) > DHCP Lease Clients I can thick a Lease and click on Make Static IP. The result is an error: Operation failed.
Is this a bug or am I doing something wrong?

RV180 f/w 1.0.4.14
Static DHCP page – missing buttons Add, Edit, Delete since some f/w update.
Apparently Cisco has changed syntax since some f/w version I don't remember.
Fix:
1. Backup unit's settings. Use some editor to check that the syntax for the section DhcpfixedIpAddress is correct in the configuration file. The main clue is a new variable "Name". An example bellow displays 2 lines in Static DHCP page. If necessary make changes most likely including upper/lower case conversion for MacAddr and the lines order.
2. Change checksum to 0.
systemConfig[1]["checksum"]="0"
3. Restore unit's settings from the edited configuration file. I have got missing buttons back only after the above procedure. Any other suggested solutions didn't work for me.
Correct syntax for newer firmware:
ifStatic[4]["SecondaryDns"] = ""
DhcpfixedIpAddress = {}
DhcpfixedIpAddress[1] = {}
DhcpfixedIpAddress[1]["MacAddr"] = "bc:ee:7b:e3:3b:0a"
DhcpfixedIpAddress[1]["Name"] = "Computer01"
DhcpfixedIpAddress[1]["IpAddr"] = "192.168.1.100"
DhcpfixedIpAddress[1]["LogicalIfName"] = "LAN"
DhcpfixedIpAddress[1]["_ROWID_"] = "1"
DhcpfixedIpAddress[2] = {}
DhcpfixedIpAddress[2]["MacAddr"] = "00:15:e9:6a:0f:15"
DhcpfixedIpAddress[2]["Name"] = "Unknown"
DhcpfixedIpAddress[2]["IpAddr"] = "192.168.1.101"
DhcpfixedIpAddress[2]["LogicalIfName"] = "LAN"
DhcpfixedIpAddress[2]["_ROWID_"] = "2"
DhcpLdapServerInfo = {}
Old syntax incompatible with newer firmware:
ifStatic[4]["SecondaryDns"] = ""
DhcpfixedIpAddress = {}
DhcpfixedIpAddress[1] = {}
DhcpfixedIpAddress[1]["IpAddr"] = "192.168.1.100"
DhcpfixedIpAddress[1]["LogicalIfName"] = "LAN"
DhcpfixedIpAddress[1]["_ROWID_"] = "1"
DhcpfixedIpAddress[1]["MacAddr"] = "BC:EE:7B:E3:3B:0A"
DhcpfixedIpAddress[2] = {}
DhcpfixedIpAddress[2]["IpAddr"] = "192.168.1.101"
DhcpfixedIpAddress[2]["LogicalIfName"] = "LAN"
DhcpfixedIpAddress[2]["_ROWID_"] = "2"
DhcpfixedIpAddress[2]["MacAddr"] = "00:15:E9:6A:0F:15"
DhcpLdapServerInfo = {}

How to synchronize between DHCP binding table and DHCP snooping table ?

I clear DHCP snooping table with command "clear ip dhcp snooping binding " , and PC can't communicate with other any more. So how to synchronize between DHCP binding table and DHCP snooping table ?
dhcp-test#sh ip dhcp bind
IP address Client-ID/ Lease expiration Type
Hardware address
99.1.65.32 0100.1125.353c.25 Mar 02 1993 01:05 AM Automatic
99.1.65.33 0100.1438.059f.85 Mar 02 1993 12:01 AM Automatic
dhcp-test#sh ip dhcp snooping binding
MacAddress IpAddress Lease(sec) Type VLAN Interface
Total number of bindings: 0
thanks!

ip dhcp snooping binding mac-address vlan vlan-id ip-address interface interface-id expiry seconds
Add binding entries to the DHCP snooping binding database. The vlan-id range is from 1 to 4904. The seconds range is from 1 to 4294967295.
Enter the above command for each entry that you add
To delete the database agent or binding file, use the no ip dhcp snooping database interface configuration command. To reset the timeout or delay values, use the ip dhcp snooping database timeout seconds or the ip dhcp snooping database write-delay seconds global configuration command.To renew the database, use the renew ip dhcp snooping database privileged EXEC command.

Show ip dhcp bind

when i use show ip dhcp bind command on switch. the mac address is two bit more than normal.such as 0100.0039.2821.b1
what mean of b1 .how could this happen.
do you have some idea?

The first two numbers indicate the media type (01 represents Ethernet). The media type and the MAC address together form the client identifier which is what you are seeing. Please see the following link for confirmation.
http://www.cisco.com/en/US/products/sw/iosswrel/ps1830/products_feature_guide09186a008008743b.html#23682
Hope this helps. If so, please rate the post.
Thanks,
Brandon

[Q]: Static DHCP Lease with the WRT54GL...

Hello,
I have replaced my old D-LINK router with a WRT54GL wireless router.
On the old router I could configure static DHCP entries, providing the same IP address to specific MAC addresses (from my different devices at home), and still continue to receive all other settings via DHCP (Like DNS servers that my ISP changes from time to time).
Using static IP addresses is not an option due that the ISP I'm connected changes the DNS settings frequently and my computers can't connect to the internet. Setting the WRT54GL router as DNS server on my computers is also not practical.
On the WRT54GL I could not find how to create static (or permanent) DHCP leases. Is this possible?.. is this in the wish list for future releases of the firmware?
Thanks in advance.

Thanks for the quick response.
I was surprised that this (and maybe other) Linksys routers does not provide this simple feature.
All DHCP servers I know provide this feature and most of the unmanaged routers that provide DHCP services have this feature.
--- Ricky.

How to get Airport Extreme to Provide DNS for Static DHCP

I set up some static DHCP entries on my Airport Extreme 802.11n. How do I make it provide DNS resolution for these devices?
For example, I defined a device which I named "tvpc". With my old router, once I added a static DHCP reservation and provided it with a name, I could "ping tvpc" from any device on my network, and my old router would provide the DNS resolution, because it provided DNS service for all DHCP entries.
I suspect that the answer is, "Apple routers don't do this." If that is the case, how do other people get name resolution for the non-Apple devices you set up with static DHCP? Do you use /etc/hosts files?

I set up some static DHCP entries on my Airport Extreme 802.11n. How do I make it provide DNS resolution for these devices?
"Apple routers don't do this."
how do other people get name resolution for the non-Apple devices you set up with static DHCP?
They don't.
Suggest that you use another router with the capabilities that you need.

EA6700 DHCP Reservation (Static DHCP) limit

Hi,
just got an EA6700. Setup was the most difficult I've ever experienced in many years of Wifi/router config. I almost packed it back up to return it. The cloud thing is absurd. Using CAPTCHA that does not even display the CAPTCHA image is even worse.
Alright, I succeeded in using the local admin login and set up the router. Actually the plan was to have it just be a wireless access point, using my Cisco RV042 as the router and DHCP server. Well that 'dream' was squashed right quick. That **bleep** RV042 blew up when I added one more Static DHCP entry. Poof. 'No more SYSTEM' errors in a few spots. On reboot the darn thing does not come back up. This after the RV042 needed to be reset after I used a quote or some other 'illegal' character in a static DHCP entry. What a piece of amateur junk.
So. Tomorrow I will reset the RV042 again and relegate it to just doing WAN failover, nothing more. The EA6700 will be the router and DHCP server. So my question (sorry for the ranting) is how many DHCP reservations the EA6700 can handle. I'll probably need 75. I assign DHCP reservations for LAN stability and to prevent IP address collisions.
Please note that I'm not talking about static IP addresses. I have a few of those too but I know they are different from DHCP reservations.
Thanks,
Sander

It's highly unlikely the EA6700 can handle 70+ DHCP reservations. But I don't know for sure.
My advice is to go back to plan A and use EA6700 as AP.
Configure it for bridge mode. Be sure to "specify and IP address". Don't use "obtain IP address automatically" when configuring bridge mode.
http://kb.linksys.com/Linksys/ukp.aspx?pid=94&vw=1&articleid=25714
Edit: don't configure ea6700 for bridge mode while it's connected to your main router. You've probably noticed by now that the EA routers will automatically change their IP to 10.x.x.x if they detect a double NAT. Which I why I suggest keeping it disconnected from main router when configuring.

WRT54GC - Port ranges, triggering, static DHCP.

Recently got a WBR54GC router and it works great on the network. I don't use it wirelessly, but hey, it was cheap, may aswell go for it! The firmware though has been less-than comforting. It works, but there are a few gaudy bugs.
Port range forwarding refuses to work on ports higher than 32768, and ports higher than 20000 are often very flaky to get the router to properly take. After saving the settings the port range often appears vastly incorrect or even impossible (ports 104824 to 0 for example).
Second comes port triggering, which puzzles me. There's no option to set if the trigger port or the forwarded range should be UDP, TCP, or both. It simply asks for two ranges of ports, one to monitor and the other to open, and it only seems to do this over TCP ports. Currently, I swap the computer's IP back and forth in the forwarded ports page to the computer I'm using. Its a fix but its a pain in the ass.
Finally comes static DHCP, the settings page of which seems to not properly remove settings. After I entered an IP/MAC combination in the first few avaliable boxes I went back to change one. The router then told me that the DHCP client I entered was already in the table? Strange. I opened the static DHCP page again and now there was nothing! Alright, enter all the details again, save settings. It again told me that the DHCP client was already in the table. Close, open it again, still blank. I tried to save the settings with the DHCP client table completely blank thinking this could correct it. Funny, I'm still entering duplicates even though the page is blank. I ended up recording my settings and doing a factory reset to wipe the table correctly.
Firmware Version: v1.02.8, latest of course. Searching these forums, I did manage to find a thread that mentioned the port range forwarding issue, the first one I talked about. The problem is the Rapidshare link given to a beta firmware was dead. Since then I'd been looking for this new firmware beta to hopefully resolve most of these issues, but without much luck.
Any help greatly appreciated.

This problem is an obvious firmware bug.
Why the hell do all router companies sell a professional looking product, but with firmware that looks like a group of random twekaers and hackers threw together?
No offence. My D-Link router has misspelt words, which is absolutely sad.

DHCP Binding oid

Dears;
Kindly i need the OID for the DHCP binding.
Best Regards
Nadeem Saleem

Hi Nadeem:
In a 6509 with the IOS DHCP server configured, there are several objects in the CISCO-IETF-DHCP-SERVER-MIB for the various statistics involved. Among them are:
                        cDhcpv4CountDiscovers,
                        cDhcpv4CountOffers,
                        cDhcpv4CountRequests,
                        cDhcpv4CountDeclines,
                        cDhcpv4CountAcks,
                        cDhcpv4CountNaks,
                        cDhcpv4CountReleases,
                        cDhcpv4CountInforms,
                        cDhcpv4CountInvalids,
                        cDhcpv4CountDropUnknownClient,
                        cDhcpv4CountDropNotServingSubnet,
                        cDhcpv4ServerSharedNetFreeAddrLowThreshold,
                        cDhcpv4ServerSharedNetFreeAddrHighThreshold,
                        cDhcpv4ServerSharedNetFreeAddresses,
                        cDhcpv4ServerSharedNetReservedAddresses,
                        cDhcpv4ServerSharedNetTotalAddresses
You might want to just try walking ciscoIetfDhcpSrvMIB and see what all comes out and which numbers work for you.

(ask) WRT54GC Static DHCP client name always "unknown"

I use WRT54GC for gateway for my internet connection. I have several wired computer that connect to switch that connet to WRT54GC. I have set Static DHCP as in manual book and name each MAC address. But in DHCP client list the name always show "unknown". Anyway to fix this? Thank you.
Message Edited by scannerfm77 on 07-29-2008 08:12 PM

The router DHCP will not show client using Static IP in the network .....
If you are using "Obtain IP settings" .... then the IP address ...computer name & MAC address ... will be there ...

WRT320N static DHCP leases

hi,
i have a wrt320n. it runs fine, but i'm in need of static DHCP leases.
the reason is simple: if one uses static port forwards for applications that doesn't support upnp, and the client gets a different ip than what's specified for the port forwards, it all gets messed up.
i couldn't find any reference for this feature neither in the manual nor in the router web interface, so i guess it's not possible ATM.
could you please add support for this (quite basic) feature?
thanks in advance.
Solved!
Go to Solution.

Well i think the feature which you are trying to look under the linksys router its not possible. I think you need to wait until linksys release the new firmware along with the DHCP Leases.

WRT54GC Static DHCP listing issue

Hello:
I have the latest firmware installed (1.02.8) and I am running into an issue:
I currently have my WRT54GC to act as a DHCP server with 100 clients; I set each of my PC's to DHCP, but the WRT54GC will serve the same IP address to each PC ("Static DHCP"). I currently have seven MAC listed in the static DHCP list, but when I attempt to add another MAC and save the settings, it times out. This has happened consistently where it appears only seven MAC's are allowed. I can edit the existing seven without an issue, but adding any more PC's times out the router.
Any ideas? I have flashed the router a number of times to no effect.
TIA.
[8F] The NyQuil KidMessage Edited by nyquilkid on 07-14-2006 07:15 AM
Message Edited by nyquilkid on 07-14-2006 07:16 AM

Hi All,
Ok,first - try to delete 7-th MAC address and IP,then click "save settings"
When it finished with rebooting,connect and try to fill the 7-th MAC with IP Address.
It should work!!!
That happening,cou'se first you should free the MAC Lock in router's memory,reboot to free it and delete from memory,and then you can fill new MAC Lock function.
Good Luck!!!
Message Edited by gochev_george on 03-16-200701:58 AM
Message Edited by gochev_george on 03-16-200702:00 AM
Thanks
Kind Regards
ing.George Gochev
DSL and Telecommunications Engineer

Static DHCP Binding

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