From: Ben (bmunyao@gmail.com)
Date: Thu Sep 27 2007 - 10:55:13 ART
Nicky,
Got the same results.
I just tried using a shorter lease of 5min on the client, with dhcp debug
running. The client did not renew the lease after 5min. Apparently the
server setting (4hrs) takes precedence.
It would be interesting to know when the command on the client side takes
effect.
Ben
On 9/27/07, nicky noname <cisco2study@gmail.com> wrote:
>
> Hi Ben...I was just testing this myself. I was interested in using secure
> arp function...'update arp', but I didn't manage to get it validated.
>
> I did try to renew the lease from the client side with the lease set to 3
> minutes on the client, but it has no affect. The lease option on the server
> side was the only thing that worked............
>
> ......so in response, I would say, what is the point with the command,
>
> ip dhcp client lease 0 0 3
> ?
>
>
> On 9/27/07, Ben < bmunyao@gmail.com> wrote:
> >
> > ---------- Forwarded message ----------
> > From: Ben < bmunyao@gmail.com>
> > Date: Sep 27, 2007 4:14 PM
> > Subject: Re: dhcp request packet
> > To: Darren Johnson <dazza_johnson@yahoo.co.uk >
> >
> >
> > When I change lease duration on the DHCP server, it seems to work.
> >
> > Rack1R2(config)#do sh run | s dhcp
> > no ip dhcp use vrf connected
> > ip dhcp excluded-address 10.1.0.2 10.1.0.254
> > ip dhcp pool TEST
> > network 10.1.0.0 255.255.255.0
> > default-router 10.1.0.2
> > domain-name ie.com
> > dns-server 10.1.0.2
> > lease 0 4
> >
> > Rack1R1(config-if)#do renew dhcp f0/0
> > Rack1R1(config-if)#
> > *Mar 1 02:14:55.871 : DHCP: Attempting to speed up renewal timer
> > Rack1R1(config-if)#
> > *Mar 1 02:14:57.103: DHCP: SRequest attempt # 1 for entry:
> > *Mar 1 02:14:57.107: DHCP: SRequest - ciaddr: 10.1.0.1
> > *Mar 1 02:14:57.107: DHCP: SRequest placed lease len option: 86400
> > *Mar 1 02:14:57.111: DHCP: SRequest: 302 bytes
> > *Mar 1 02:14:57.111: DHCP: SRequest: 302 bytes
> > *Mar 1 02:14:57.115: IP: tableid=0, s= 10.1.0.1 (local), d=
> > 10.1.0.2(FastEthernet0/0), routed via FIB
> > *Mar 1 02:14:57.115: IP: s=10.1.0.1 (local), d=10.1.0.2(FastEthernet0/0),
> > len 604, sending
> > *Mar 1 02:14:57.119 : UDP src=68, dst=67
> > *Mar 1 02:14:57.235: IP: tableid=0, s=10.1.0.2 (FastEthernet0/0), d=
> > 10.1.0.1 (FastEthernet0/0), routed via RIB
> > Rack1R1(config-if)#
> > *Mar 1 02:14:57.239: IP: s=10.1.0.2 (FastEthernet0/0),
> > d=10.1.0.1(FastEthernet0/0), len 338, rcvd 3
> > *Mar 1 02:14:57.243: UDP src=67, dst=68
> > *Mar 1 02:14: 57.247: DHCP: Received a BOOTREP pkt
> > Rack1R1(config-if)#
> > *Mar 1 02:14:58.251: DHCP Client Pooling: ***Allocated IP address:
> > 10.1.0.1
> >
> >
> > Rack1R1(config-if)#do sh dhcp lease
> > Temp IP addr: 10.1.0.1 for peer on Interface: FastEthernet0/0
> > Temp sub net mask: 255.255.255.0
> > DHCP Lease server: 10.1.0.2 , state: 3 Bound
> > DHCP transaction id: 1C85
> > Lease: 14400 secs, Renewal: 7200 secs, Rebind: 12600 secs
> > Temp default-gateway addr: 10.1.0.2
> > Next timer fires after: 01:59:48
> > Retry count: 0 Client-ID: cisco-cc00.0c20.0000-Fa0/0
> > Client-ID hex dump: 636973636F2D636330302E306332302E
> > 303030302D4661302F30
> > Hostname: Rack1R1
> > Rack1R1(config-if)#
> >
> >
> > Sincerely
> >
> > Ben
> >
> >
> >
> > On 9/27/07, Ben <bmunyao@gmail.com> wrote:
> > >
> > > Hi Everyone,
> > >
> > > I did the following on dynamips:
> > >
> > > R1(f0/0)----------------------(f0/0)R2
> > > client server
> > >
> > > Note that on R2 (server), the default lease duration is not changed:
> > >
> > > Rack1R2(config)#
> > > Rack1R2(config)#do sh run | s dhcp
> > > no ip dhcp use vrf connected
> > > ip dhcp excluded-address 10.1.0.2 10.1.0.254
> > > ip dhcp pool TEST
> > > network 10.1.0.0 255.255.255.0
> > > default-router 10.1.0.2
> > > domain-name ie.com
> > > dns-server 10.1.0.2
> > > Rack1R2(config)#
> > >
> > > Rack1R1(config-if)#do sh run int f0/0
> > > Building configuration...
> > >
> > > Current configuration : 103 bytes
> > > !
> > > interface FastEthernet0/0
> > > ip dhcp client lease 0 2 0
> > > ip address dhcp
> > > duplex auto
> > > speed auto
> > > end
> > >
> > > Rack1R1(config-if)#do renew dhcp f0/0
> > > Rack1R1(config-if)#
> > > *Mar 1 02:06:32.731: DHCP: Attempting to speed up renewal timer
> > > Rack1R1(config-if)#
> > > *Mar 1 02:06:34.127: DHCP: SRequest attempt # 1 for entry:
> > > *Mar 1 02:06:34.131: DHCP: SRequest - ciaddr: 10.1.0.1
> > > *Mar 1 02:06:34.135: DHCP: SRequest placed lease len option: 86400
> > > *Mar 1 02:06:34.135: DHCP: SRequest: 302 bytes
> > > *Mar 1 02:06:34.139: DHCP: SRequest: 302 bytes
> > > *Mar 1 02:06:34.139: IP: tableid=0, s= 10.1.0.1 (local), d= 10.1.0.2(FastEthernet0/0),
> > > routed via FIB
> > > *Mar 1 02:06:34.143: IP: s=10.1.0.1 (local), d= 10.1.0.2(FastEthernet0/0),
> > len 604, sending
> > > *Mar 1 02:06:34.147: UDP src=68, dst=67
> > > *Mar 1 02:06:34.295: IP: tableid=0, s=10.1.0.2 (FastEthernet0/0), d=
> > 10.1.0.1(FastEthernet0/0), routed via RIB
> > > Rack1R1(config-if)#
> > > *Mar 1 02:06:34.299 : IP: s= 10.1.0.2 (FastEthernet0/0), d= 10.1.0.1(FastEthernet0/0),
> > len 338, rcvd 3
> > > *Mar 1 02:06:34.303: UDP src=67, dst=68
> > > *Mar 1 02:06:34.307: DHCP: Received a BOOTREP pkt
> > > Rack1R1(config-if)#
> > > *Mar 1 02:06:35.311: DHCP Client Pooling: ***Allocated IP address:
> > > 10.1.0.1
> > > Rack1R1(config-if)#
> > >
> > >
> > > Rack1R1(config-if)#do sh dhcp lease
> > > Temp IP addr: 10.1.0.1 for peer on Interface: FastEthernet0/0
> > > Temp sub net mask: 255.255.255.0
> > > DHCP Lease server: 10.1.0.2 , state: 3 Bound
> > > DHCP transaction id: 1C85
> > > Lease: 86400 secs, Renewal: 43200 secs, Rebind: 75600 secs
> > > Temp default-gateway addr: 10.1.0.2
> > > Next timer fires after: 11:59:41
> > > Retry count: 0 Client-ID: cisco-cc00.0c20.0000-Fa0/0
> > > Client-ID hex dump: 636973636F2D636330302E306332302E
> > > 303030302D4661302F30
> > > Hostname: Rack1R1
> > > Rack1R1(config-if)#
> > >
> > >
> > > Any ideas why the lease duration it gets is 24hrs, instead of the
> > > configured 2hrs (on client) ?
> > >
> > > TIA
> > >
> > > Ben
> > >
> > >
> > > On 9/27/07, Darren Johnson < dazza_johnson@yahoo.co.uk> wrote:
> > > >
> > > > Actually, the question states 'how do i make the
> > > > router generate a dhcp request packet to renew its
> > > > ethernet interface ip address every 3 hours'
> > > >
> > > > Therefore the router gets its own IP address via DHCP,
> > > > and you want to instruct it to genereate a dhcp
> > > > reuqest every 3 hours.
> > > >
> > > > The solution I had was to use 'ip dhcp client lease'
> > > > under interface configuration.
> > > >
> > > > Take a look at this:
> > > >
> > > >
> > > >
> > http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hiad_r/adr_i1h.htm#wp1173534
> > > >
> > > >
> > > > --- jerry.du@accenture.com wrote:
> > > >
> > > > > Actually, you can set to 6 hours because DHCP client
> > > > > will ask DHCP
> > > > > server in half of DHCEP lease time.
> > > > >
> > > > > Regards,
> > > > > Jerry
> > > > >
> > > > > -----Original Message-----
> > > > > From: nobody@groupstudy.com
> > > > > [mailto:nobody@groupstudy.com ] On Behalf Of
> > > > > Ryan Morris
> > > > > Sent: Wednesday, September 26, 2007 3:25 PM
> > > > > To: Cisco certification
> > > > > Subject: Re: dhcp request packet
> > > > >
> > > > > This is asking you to set the lease time to 3 hours
> > > > > in the router acting
> > > > > as a dhcp server. Under the pool configuration:
> > > > >
> > > > > lease <days> <hours>
> > > > >
> > > > > R.
> > > > >
> > > > >
> > > > > On Wed, 26 Sep 2007, slevin kremera wrote:
> > > > >
> > > > > > Hi EXPERTS
> > > > > >
> > > > > > how do i make the router generate a dhcp request
> > > > > packet to renew its
> > > > > > ethernet interface ip address every 3 hours
> > > > > >
> > > > > > SK
> > > > > >
> > > > > >
> > > > >
> > > >
> > _______________________________________________________________________
> > > > > > Subscription information may be found at:
> > > > > > http://www.groupstudy.com/list/CCIELab.html
> > > > >
> > > > >
> > > >
> > _______________________________________________________________________
> > > > > Subscription information may be found at:
> > > > > http://www.groupstudy.com/list/CCIELab.html
> > > > >
> > > > >
> > > > > This message is for the designated recipient only
> > > > > and may contain privileged, proprietary, or
> > > > > otherwise private information. If you have received
> > > > > it in error, please notify the sender immediately
> > > > > and delete the original. Any other use of the email
> > > > > by you is prohibited.
> > > > >
> > > > >
> > > >
> > _______________________________________________________________________
> > > > > Subscription information may be found at:
> > > > > http://www.groupstudy.com/list/CCIELab.html
> > > > >
> > > >
> > > >
> > > >
> > > > ___________________________________________________________
> > > > Want ideas for reducing your carbon footprint? Visit Yahoo! For
> > Good http://uk.promotions.yahoo.com/forgood/environment.html
> > > >
> > > >
> > > >
> > _______________________________________________________________________
> > > > Subscription information may be found at:
> > > > http://www.groupstudy.com/list/CCIELab.html
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Sat Oct 06 2007 - 12:01:16 ART