From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Thu Aug 23 2007 - 19:39:21 ART
PPPoE will allow it but serial interfaces will not ;-)
ip dhcp excluded-address 139.1.45.1 139.1.45.3
ip dhcp excluded-address 139.1.45.5 139.1.45.255
!
ip dhcp pool R4
network 139.1.45.0 255.255.255.0
!
interface Serial0/1
ip address 139.1.45.5 255.255.255.0
encapsulation ppp
peer default ip address dhcp-pool R4
clock rate 64000
end
Rack1R5(config-if)#shut
Rack1R5(config-if)#no shut
%LINK-5-CHANGED: Interface Serial0/1, changed state to administratively down
DHCPD: Interface Serial0/1 is not associated with any VRF.
DHCPD: freeing address for client
6369.7363.6f2d.3133.392e.312e.3435.2e35.2d53.6572.6961.6c30.2f31
(139.1.45.4).
DHCPD: returned 139.1.45.4 to address pool R4.
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state
to down
%LINK-3-UPDOWN: Interface Serial0/1, changed state to up
DHCPD: allocate request for client cisco-139.1.45.5-Serial0/1 on Serial0/1.
DHCPD: Pool R4 specified.
DHCPD: Interface Serial0/1 is not associated with any VRF.
DHCPD: found pool R4 for client cisco-139.1.45.5-Serial0/1.
DHCPD: Allocate an address without class information (139.1.45.0)
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state
to up
DHCPD: Adding binding to radix tree (139.1.45.4)
DHCPD: Adding binding to hash tree
DHCPD: assigned IP address 139.1.45.4 to client
6369.7363.6f2d.3133.392e.312e.3435.2e35.2d53.6572.6961.6c30.2f31.
Rack1R5(config-if)#do sho ip dhcp bind
Bindings from all pools not associated with VRF:
IP address Client-ID/ Lease expiration Type
Hardware address/
User name
139.1.45.4 6369.7363.6f2d.3133. Infinite On-demand
392e.312e.3435.2e35.
2d53.6572.6961.6c30.
2f31
Rack1R5(config-if)#
Rack1R4(config-if)#do sho ip int s0/1
Serial0/1 is up, line protocol is up
Internet address is 139.1.45.4/32
Broadcast address is 255.255.255.255
Address determined by IPCP
Peer address is 139.1.45.5
HTH,
Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
>----- Original Message -----
Subject: Re: peer default ip address dhcp
Date: Thu, August 23, 2007 14:57
From: "ISolveSystems" <support@isolvesystems.com>
> It doesn't take "ip address dhcp" since this is a PPP interface.
>
> I did a debug ip packet detail on R1 and confirm that the DHCP request
> reaches R1.
>
> *Aug 23 22:13:12.205: IP: s=139.1.45.5 (Serial0/0/0),
> d=139.1.15.1(Serial0/0/0), len 604, rcvd 3
> *Aug 23 22:13:12.205: UDP src=68, dst=67
> *Aug 23 22:13:12.205: IP: tableid=0, s=139.1.15.1 (local),
> d=139.1.45.5(Serial0/0/0), routed via FIB
> *Aug 23 22:13:12.205: IP: s=139.1.15.1 (local), d=139.1.45.5 (Serial0/0/0),
> len 328, sending
> *Aug 23 22:13:12.205: UDP src=67, dst=67
>
>
>
> On 8/23/07, Brian Dennis <bdennis@internetworkexpert.com> wrote:
> >
> > Change R4 to "ip address dhcp" and see if that makes a difference.
> >
> > Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP)
> > bdennis@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-224-8987
> > Direct: 775-745-6404 (Outside the US and Canada)
> >
> >
> > >----- Original Message -----
> > Subject: peer default ip address dhcp
> > Date: Thu, August 23, 2007 14:29
> > From: "ISolveSystems" <support@isolvesystems.com>
> >
> > > R4 is connect to R5 via ppp and R5 is connected to R1 via ppp.
> > >
> > > R4----ppp----R5-----fr-----R1
> > >
> > > R4 is configured to obtain ip address from R1 via PPP negotiation. For
> > some
> > > reason, R4 is not getting the IP.
> > >
> > > Debug ppp neg on R4 shows:-(partial output)
> > > *Aug 23 21:47:39.217: Se0/1/0 IPCP: Timeout: State ACKsent
> > > *Aug 23 21:47:39.217: Se0/1/0 IPCP: O CONFREQ [ACKsent] id 3 len 10
> > > *Aug 23 21:47:39.217: Se0/1/0 IPCP: Address 0.0.0.0 (0x030600000000)
> > > *Aug 23 21:47:39.217: Se0/1/0 IPCP: I CONFREQ [ACKsent] id 3 len 10
> > > *Aug 23 21:47:39.217: Se0/1/0 IPCP: Address
139.1.45.5(0x03068B012D05)
> > > *Aug 23 21:47:39.217: Se0/1/0 IPCP: O CONFACK [ACKsent] id 3 len 10
> > > *Aug 23 21:47:39.217: Se0/1/0 IPCP: Address
139.1.45.5(0x03068B012D05)
> > > *Aug 23 21:47:39.297: Se0/1/0 IPCP: I CONFREJ [ACKsent] id 1 len 10
> > > *Aug 23 21:47:39.297: Se0/1/0 IPCP: Address 0.0.0.0 (0x030600000000)
> > > Rack1R4(config-if)#
> > > *Aug 23 21:47:39.297: Se0/1/0 IPCP: ID 1 didn't match 3, discarding
> > packet
> > > Rack1R4(config-if)#
> > > *Aug 23 21:47:41.233: Se0/1/0 IPCP: Timeout: State ACKsent
> > > *Aug 23 21:47:41.233: Se0/1/0 IPCP: O CONFREQ [ACKsent] id 4 len 10
> > > *Aug 23 21:47:41.233: Se0/1/0 IPCP: Address 0.0.0.0 (0x030600000000)
> > >
> > > R1 has the following:-
> > > ip dhcp pool R4
> > > network 139.1.45.0 255.255.255.0
> > > ip dhcp excluded-address 139.1.45.1 139.1.45.3
> > > ip dhcp excluded-address 139.1.45.5 139.1.45.255
> > >
> > > R5 has the following:-
> > > ip dhcp-server 139.1.15.1 --pointing to R1
> > >
> > > interface Serial0/1/0
> > > ip address 139.1.45.5 255.255.255.0
> > > ip rip advertise 3
> > > encapsulation ppp
> > > ip policy route-map FROM_VL43
> > > peer default ip address dhcp
> > > clock rate 2000000
> > > end
> > >
> > > R4 has the follwoing:-
> > > interface Serial0/1/0
> > > ip address negotiated
> > > ip rip advertise 3
> > > encapsulation ppp
> > > end
> > >
> > > _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Sat Sep 01 2007 - 11:32:12 ART