Interesting Thanks Jason Maynard
________________________________ From: garry baker <[email protected]> To: Jason Maynard <[email protected]> Cc: Aung Phyo Lwin <[email protected]>; [email protected] Sent: Thu, October 14, 2010 12:44:23 PM Subject: Re: [OSL | CCIE_RS] DHCP manual binding yeah i pulled up the doccd to check the "real way" to do it and it states the same as you said with the 01, that is why i was wondering about the gns3 thing, and i do not have any real routers to test on at the moment... http://www.cisco.com/en/US/customer/docs/ios/ipaddr/configuration/guide/iad_dhcp_svr_cfg_ps6441_TSD_Products_Configuration_Guide_Chapter.html#wp1155880 "DHCP clients require client identifiers. The unique identification of the client is specified in dotted hexadecimal notation; for example, 01b7.0813.8811.66, where 01 represents the Ethernet media type." but i didnt see that in my debug and i tried it and it did not work either on my gns3 setup that is... -- Garry L. Baker "There is no 'patch' for stupidity." - www.sqlsecurity.com On Thu, Oct 14, 2010 at 11:39 AM, Jason Maynard <[email protected]> wrote: interesting > > >Gary: I wonder what the difference is between the method you provided and the >method I provided. > > > > Jason Maynard > > > > > ________________________________ From: garry baker <[email protected]> >To: Aung Phyo Lwin <[email protected]> >Cc: [email protected] >Sent: Thu, October 14, 2010 12:26:36 PM > >Subject: Re: [OSL | CCIE_RS] DHCP manual binding > > >do a 'debug ip dhcp server packet' on the dhcp server and you will see the >client id, not sure if it is a GNS3 thing or not, never tired it on real >hardware... > >but i did it on GNS3 and this is how i got it to work: > >R1(dhcp server 2.2.2.1) <-> R2(client) > >R1#debug ip dhcp server packet >R1# >*Mar 1 01:19:45.635: DHCPD: DHCPDISCOVER received from client >0063.6973.636f.2d63.3430.312e.3032.3163.2e30.3030.312d.4661.302f.31 on >interface >FastEthernet0/1. >*Mar 1 01:19:48.759: DHCPD: DHCPDISCOVER received from client >0063.6973.636f.2d63.3430.312e.3032.3163.2e30.3030.312d.4661.302f.31 on >interface >FastEthernet0/1. >*Mar 1 01:19:52.883: DHCPD: DHCPDISCOVER received from client >0063.6973.636f.2d63.3430.312e.3032.3163.2e30.3030.312d.4661.302f.31 on >interface >FastEthernet0/1. > >R1#sh run | s dhcp >ip dhcp pool DHCP_POOL2 > host 2.2.2.2 255.255.255.0 > client-identifier >0063.6973.636f.2d63.3430.312e.3032.3163.2e30.3030.312d.4661.302f.31 > client-name R2 > >R2, client debug: >R2(config-if)#do sh debug >DHCPC: > DHCP client activity debugging is on (detailed) > >R2(config-if)# >*Mar 1 01:21:32.943: DHCP: DHCP client process started: 10 >*Mar 1 01:21:32.963: RAC: Starting DHCP discover on FastEthernet0/1 >*Mar 1 01:21:32.963: DHCP: Try 1 to acquire address for FastEthernet0/1 >*Mar 1 01:21:32.979: DHCP: allocate request >*Mar 1 01:21:32.979: DHCP: zapping entry in DHC_PURGING state for Fa0/1 >*Mar 1 01:21:32.979: DHCP: deleting entry 660F680C 0.0.0.0 from list >*Mar 1 01:21:32.983: Temp IP addr: 0.0.0.0 for peer on Interface: >FastEthernet0/1 >*Mar 1 01:21:32.983: Temp sub net mask: 0.0.0.0 >*Mar 1 01:21:32.983: DHCP Lease server: 0.0.0.0, state: 11 Purging >*Mar 1 01:21:32.983: DHCP transaction id: 172E >*Mar 1 01:21:32.983: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs >*Mar 1 01:21:32.987: Next timer fires after: 00:00:20 >*Mar 1 01:21:32.987: Retry count: 0 Client-ID: cisco-c401.021c.0001-Fa0/1 >*Mar 1 01:21:32.987: Client-ID hex dump: 636973636F2D633430312E303231632E >*Mar 1 01:21:32.995: 303030312D4661302F31 >*Mar 1 01:21:32.999: Hostname: R2 >*Mar 1 01:21:32.999: DHCP: new entry. add to queue, interface FastEthernet0/1 >*Mar 1 01:21:32.999: DHCP: SDiscover attempt # 1 for entry: >*Mar 1 01:21:32.999: Temp IP addr: 0.0.0.0 for peer on Interface: >FastEthernet0/1 >*Mar 1 01:21:32.999: Temp sub net mask: 0.0.0.0 >*Mar 1 01:21:33.003: DHCP Lease server: 0.0.0.0, state: 3 Selecting >*Mar 1 01:21:33.003: DHCP transaction id: 192C >*Mar 1 01:21:33.003: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs >*Mar 1 01:21:33.003: Next timer fires after: 00:00:04 >*Mar 1 01:21:33.007: Retry count: 1 Client-ID: cisco-c401.021c.0001-Fa0/1 >*Mar 1 01:21:33.007: Client-ID hex dump: 636973636F2D633430312E303231632E >*Mar 1 01:21:33.011: 303030312D4661302F31 >*Mar 1 01:21:33.015: Hostname: R2 >*Mar 1 01:21:33.015: DHCP: SDiscover: sending 291 byte length DHCP packet >*Mar 1 01:21:33.019: DHCP: SDiscover 291 bytes >*Mar 1 01:21:33.019: B'cast on FastEthernet0/1 interface from >0.0.0.0 >*Mar 1 01:21:33.115: DHCP: Received a BOOTREP pkt >*Mar 1 01:21:33.115: DHCP: Scan: Message type: DHCP Offer >*Mar 1 01:21:33.119: DHCP: Scan: Server ID Option: 2.2.2.1 = 2020201 >*Mar 1 01:21:33.119: DHCP: Scan: Lease Time: 86400 >*Mar 1 01:21:33.119: DHCP: Scan: Renewal time: 43200 >*Mar 1 01:21:33.119: DHCP: Scan: Rebind time: 75600 >*Mar 1 01:21:33.119: DHCP: Scan: Subnet Address Option: 255.255.255.0 >*Mar 1 01:21:33.123: DHCP: rcvd pkt source: 2.2.2.1, destination: >255.255.255.255 >*Mar 1 01:21:33.123: UDP sport: 43, dport: 44, length: 308 >*Mar 1 01:21:33.123: DHCP op: 2, htype: 1, hlen: 6, hops: 0 >*Mar 1 01:21:33.123: DHCP server identifier: 2.2.2.1 >*Mar 1 01:21:33.123: xid: 192C, secs: 0, flags: 8000 >*Mar 1 01:21:33.127: client: 0.0.0.0, your: 2.2.2.2 >*Mar 1 01:21:33.127: srvr: 0.0.0.0, gw: 0.0.0.0 >*Mar 1 01:21:33.127: options block length: 60 > >*Mar 1 01:21:33.127: DHCP Offer Message Offered Address: 2.2.2.2 >*Mar 1 01:21:33.131: DHCP: Lease Seconds: 86400 Renewal secs: 43200 >Rebind secs: 75600 >*Mar 1 01:21:33.131: DHCP: Server ID Option: 2.2.2.1 >*Mar 1 01:21:33.131: DHCP: offer received from 2.2.2.1 >*Mar 1 01:21:33.131: DHCP: SRequest attempt # 1 for entry: >*Mar 1 01:21:33.135: Temp IP addr: 2.2.2.2 for peer on Interface: >FastEthernet0/1 >*Mar 1 01:21:33.135: Temp sub net mask: 255.255.255.0 >*Mar 1 01:21:33.135: DHCP Lease server: 2.2.2.1, state: 4 Requesting >*Mar 1 01:21:33.135: DHCP transaction id: 192C >*Mar 1 01:21:33.135: Lease: 86400 secs, Renewal: 0 secs, Rebind: 0 secs >*Mar 1 01:21:33.139: Next timer fires after: 00:00:03 >*Mar 1 01:21:33.139: Retry count: 1 Client-ID: cisco-c401.021c.0001-Fa0/1 >*Mar 1 01:21:33.139: Client-ID hex dump: 636973636F2D633430312E303231632E >*Mar 1 01:21:33.147: 303030312D4661302F31 >*Mar 1 01:21:33.151: Hostname: R2 >*Mar 1 01:21:33.151: DHCP: SRequest- Server ID option: 2.2.2.1 >*Mar 1 01:21:33.151: DHCP: SRequest- Requested IP addr option: 2.2.2.2 >*Mar 1 01:21:33.151: DHCP: SRequest placed lease len option: 86400 >*Mar 1 01:21:33.151: DHCP: SRequest: 309 bytes >*Mar 1 01:21:33.151: DHCP: SRequest: 309 bytes >*Mar 1 01:21:33.155: B'cast on FastEthernet0/1 interface from >0.0.0.0 >*Mar 1 01:21:33.303: DHCP: Received a BOOTREP pkt >*Mar 1 01:21:33.303: DHCP: Scan: Message type: DHCP Ack >*Mar 1 01:21:33.303: DHCP: Scan: Server ID Option: 2.2.2.1 = 2020201 >*Mar 1 01:21:33.307: DHCP: Scan: Lease Time: 86400 >*Mar 1 01:21:33.307: DHCP: Scan: Renewal time: 43200 >*Mar 1 01:21:33.307: DHCP: Scan: Rebind time: 75600 >*Mar 1 01:21:33.307: DHCP: Scan: Subnet Address Option: 255.255.255.0 >*Mar 1 01:21:33.311: DHCP: rcvd pkt source: 2.2.2.1, destination: >255.255.255.255 >*Mar 1 01:21:33.311: UDP sport: 43, dport: 44, length: 308 >*Mar 1 01:21:33.311: DHCP op: 2, htype: 1, hlen: 6, hops: 0 >*Mar 1 01:21:33.311: DHCP server identifier: 2.2.2.1 >*Mar 1 01:21:33.311: xid: 192C, secs: 0, flags: 8000 >*Mar 1 01:21:33.315: client: 0.0.0.0, your: 2.2.2.2 >*Mar 1 01:21:33.315: srvr: 0.0.0.0, gw: 0.0.0.0 >*Mar 1 01:21:33.315: options block length: 60 > >*Mar 1 01:21:33.315: DHCP Ack Message >*Mar 1 01:21:33.315: DHCP: Lease Seconds: 86400 Renewal secs: 43200 >Rebind secs: 75600 >*Mar 1 01:21:33.319: DHCP: Server ID Option: 2.2.2.1 >*Mar 1 01:21:34.935: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state >to up >*Mar 1 01:21:35.935: %LINEPROTO-5-UPDOWN: Line protocol on Interface >FastEthernet0/1, changed state to up >*Mar 1 01:21:36.339: DHCP: Releasing ipl options: >*Mar 1 01:21:36.339: DHCP: Applying DHCP options: >*Mar 1 01:21:36.339: DHCP Client Pooling: ***Allocated IP address: 2.2.2.2 >*Mar 1 01:21:36.367: Allocated IP address = 2.2.2.2 255.255.255.0 > >*Mar 1 01:21:36.367: %DHCP-6-ADDRESS_ASSIGN: Interface FastEthernet0/1 >assigned >DHCP address 2.2.2.2, mask 255.255.255.0, hostname R2 > >*Mar 1 01:21:41.075: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.1 on >FastEthernet0/1 >from LOADING to FULL, Loading Done > > >R2(config-if)#do sh ip int br | i DHCP >FastEthernet0/1 2.2.2.2 YES DHCP up >u > > > > > >-- >Garry L. Baker > >"There is no 'patch' for stupidity." - www.sqlsecurity.com > > > >On Thu, Oct 14, 2010 at 12:57 AM, Aung Phyo Lwin <[email protected]> wrote: > >Hi All, >> >>Have someone tried manual DHCP binding on GNS3? I tired a few options and its >>not work. I'm not sure its because of GNS3. I think it can work on real >>router. >>Or If something I left to configure. I refer the cisco doc and tried a few >>option and still not work. Even I tried with setting static MAC on the client >>interface. I never used this option in outside environment as hardly use dhcp >>server on the router and if its use, just use a pool of address and dynamic >>mapping. >> >>(R2-dhcp-server) <-------> (client) >> >>SERVer side. >>send a client identifier in the dhcp packet >>ip dhcp pool pool1 >> host 172.16.2.254 >> client-identifier 02c7.f800.0422 >> client-name example1 >>do not send a client identifier in the DHCP >>ip dhcp pool pool2 >> host 172.16.2.253 >> hardware-address 02c7.f800.0422 ethernet >> client-name example1 >> >>Client Side. >>interface FastEthernet0/0 >> ip address dhcp >> duplex auto >> speed auto >>or >>interface FastEthernet0/0 >>ip dhcp client client-id ascii example1 >> ip address dhcp >> duplex auto >> speed auto >> >>some debug >>Client >>*Mar 1 03:00:31.639: IP: s=0.0.0.0 (local), d=255.255.255.255 >>(FastEthernet0/0), len 319, sending broad/multicast >>*Mar 1 03:00:31.639: UDP src=68, dst=67 >> >>Server >>*Mar 1 03:02:36.231: DHCPD: Sending notification of DISCOVER: >>*Mar 1 03:02:36.231: DHCPD: htype 1 chaddr 02c7.f800.0422 >>*Mar 1 03:02:36.231: DHCPD: remote id 020a0000c0a8010100000000 >>*Mar 1 03:02:36.231: DHCPD: circuit id 00000000 >>*Mar 1 03:02:36.231: DHCPD: DHCPDISCOVER received from client >>0063.6973.636f.2d30.3263.372e.6638.3030.2e30.3432.322d.4661.302f.30 on >>interface >>FastEthernet0/0. >>*Mar 1 03:02:36.235: DHCPD: Seeing if there is an internally specified pool >>class: >>*Mar 1 03:02:36.235: DHCPD: htype 1 chaddr 02c7.f800.0422 >>*Mar 1 03:02:36.235: DHCPD: remote id 020a0000c0a8010100000000 >>*Mar 1 03:02:36.235: DHCPD: circuit id 00000000u all >> >>Regards, >>Phyo >> >>_______________________________________________ >>For more information regarding industry leading CCIE Lab training, please >>visit >>www.ipexpert.com >> >> >
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
