From: Radoslav Vasilev (deckland@gmail.com)
Date: Sat Jul 08 2006 - 07:53:39 ART
Hi Petr,
That's it!
I didn't have connectivity to the giaddr...
That catch is that this section is before the IGP one and therefore didn't
have connectivity to that IP from R1 (the DHCP server).
Thanks again :)!
Rado
On 7/8/06, Petr Lapukhov <petr@internetworkexpert.com> wrote:
>
> Radoslav,
>
> Make sure that DHCP server is able to reach <giaddr> (gateway address).
> Run "debug dhcp" at DHCP "proxy", to see if it actually receives DHCP
> response
> from server. In your scenario giaddr should be R5's endpoint of the link,
> AFAIR.
>
> HTH
> --
> Petr Lapukhov, CCIE #16379
> petr@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987
> Outside US: 775-826-4344
>
> 2006/7/8, Radoslav Vasilev <deckland@gmail.com>:
> >
> > Hi Group,
>
> I'm having issues with giving a dynamic IP address to a remote PPP peer
> over
> a sync serial interface.
> The setup:
>
> R5 has connectivity to R1, where R1 is configured as a DHCP Server.
> R5's serial 0/1 is connected to router R4's serial0/1. The requirenment is
>
> for R4 to negotiate IP address through IPCP from R5, where R5 should
> obtain
> it from the DHCP server (R1).
>
> My setup:
>
> hostname R4
> int se0/1
> encap ppp
> ip address negotiated
>
> hostname R5
> int se0/1
> encap ppp
> ip address 139.1.45.5 255.255.255.0
> peer default ip address dhcp
> ip dhcp-server 139.1.15.1 ===> this is R1 IP
>
> hostname R1
> service dhcp
> ip dhcp exclude 139.1.45.0 139.1.45.3
> ip dhcp exclude 139.1.45.5 139.1.45.255
> !here, we exlude everything but 139.1.45.4 which is therefore reserved for
> R4's PPP iface
> ip dhcp pool r4ppp
> network 139.1.45.0 /24
>
> The next effect of what i think is the right configuration is that R4
> doesn't obtain IP address:
>
> Serial0/1 is up, line protocol is up
> Hardware is PowerQUICC Serial
> Internet address will be negotiated using IPCP
>
>
> At the same time, R1 (DHCP server) has been requested IP address from R5,
> and has lease in the database:
>
> Rack1R1#sh ip dhcp binding
> IP address Hardware address Lease expiration Type
> 139.1.45.4 0063.6973.636f.2d31. Mar 01 1993 12:28 AM Automatic
> 3339.2e31.2e34.352e.
> 352d.5365.7269.616c.
> 302f.31
>
> Debugging R5 while R4 is trying to bring the iface up shows:
>
> *Mar 1 00:21:20.663 : Se0/1 IPCP: TIMEout: State REQsent
> *Mar 1 00:21:20.663: Se0/1 IPCP: State is REQsent
> *Mar 1 00:21:21.159: Se0/1 IPCP: Cannot satisfy pool request
> *Mar 1 00:21:21.159: Se0/1 IPCP: Neither side knows remote address
> *Mar 1 00:21:21.159: Se0/1 IPCP: O CONFREJ [REQsent] id 9 len 10
> *Mar 1 00:21:21.159: Se0/1 IPCP: Address 0.0.0.0 (0x030600000000)
> *Mar 1 00:21:21.159: Se0/1 EVT: IPCP Packet 0 0x82F5302C
> *Mar 1 00:21:21.159: Se0/1 IPCP: I CONFACK [REQsent] id 9 len 10
> *Mar 1 00:21:21.159: Se0/1 IPCP: Address 139.1.45.5 (0x03068B012D05)
> *Mar 1 00:21:21.159: Se0/1 IPCP: ID 9 didn't match 10, discarding packet
> Rack1R5#
> *Mar 1 00:21:21.163: Se0/1 EVT: IPCP Packet 0 0x82F53920
> *Mar 1 00:21:21.163: Se0/1 IPCP: I CONFACK [REQsent] id 10 len 10
> *Mar 1 00:21:21.163: Se0/1 IPCP: Address 139.1.45.5 (0x03068B012D05)
> *Mar 1 00:21:21.163: Se0/1 EVT: IPCP Packet 0 0x82F53F18
> *Mar 1 00:21:21.163: Se0/1 IPCP: I CONFREQ [ACKrcvd] id 10 len 10
> *Mar 1 00:21:21.163: Se0/1 IPCP: Address 0.0.0.0 (0x030600000000)
> Rack1R5#
> *Mar 1 00:21:25.263: Se0/1 IPCP: Cannot satisfy pool request
> *Mar 1 00:21:25.263: Se0/1 IPCP: Neither side knows remote address
> *Mar 1 00:21:25.263: Se0/1 IPCP: O CONFREJ [ACKrcvd] id 10 len 10
> *Mar 1 00:21:25.263: Se0/1 IPCP: Address 0.0.0.0 (0x030600000000)
> *Mar 1 00:21:25.267: Se0/1 EVT: IPCP Packet 0 0x82CF46C4
> *Mar 1 00:21:25.271: Se0/1 IPCP: I CONFREQ [ACKrcvd] id 11 len 4
> *Mar 1 00:21:25.271: Se0/1 IPCP: O CONFACK [ACKrcvd] id 11 len 4
> *Mar 1 00:21:25.271: Se0/1 IPCP: State is Open
> *Mar 1 00:21:25.271: Se0/1 EVT: IPCP UP 0 0x82CD3228
>
> Any ideas how this could be interpreted.
>
> Thanks for your help!
> Rado
>
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