IEWB lab 13 dhcp & isdn task 4.3 and task 12.1

From: ccie2be (ccie2be@nyc.rr.com)
Date: Thu Nov 04 2004 - 21:49:48 GMT-3


Hey guys,

I've configured R4 and R5 as shown is the SG, but the dhcp part doesn't seem
to working, although I'm not 100% sure.

Here's some output from deb dhcp on R5:

*Mar 1 07:08:42.478: DHCP Lease server: 0.0.0.0, state: 1 Selecting
*Mar 1 07:08:42.478: DHCP transaction id: FCC10C
*Mar 1 07:08:42.478: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:08:42.478: Next timer fires after: 00:00:03
*Mar 1 07:08:42.478: Retry count: 2 Client-ID:
cisco-139.3.45.5-BRI0/0:1
*Mar 1 07:08:42.478: DHCP: SDiscover: sending 285 byte length DHCP packet
*Mar 1 07:08:42.478: DHCP: SDiscover 285 bytes
*Mar 1 07:08:53.078: DHCP: QScan: Purging entry
*Mar 1 07:08:53.078: DHCP: deleting entry 622AE8CC 0.0.0.0 from list
*Mar 1 07:08:53.078: Temp IP addr: 0.0.0.0 for peer on Interface: unknown
*Mar 1 07:08:53.078: Temp sub net mask: 0.0.0.0
*Mar 1 07:08:53.078: DHCP Lease server: 0.0.0.0, state: 8 Purging
*Mar 1 07:08:53.078: DHCP transaction id: FCC107
*Mar 1 07:08:53.078: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:08:53.078: No timer running
*Mar 1 07:08:53.078: Retry count: 0 Client-ID:
*Mar 1 07:08:57.178: DHCP: QScan: Purging entry
*Mar 1 07:08:57.178: DHCP: deleting entry 629D70C0 0.0.0.0 from list
*Mar 1 07:08:57.178: Temp IP addr: 0.0.0.0 for peer on Interface: unknown
*Mar 1 07:08:57.178: Temp sub net mask: 0.0.0.0
*Mar 1 07:08:57.178: DHCP Lease server: 0.0.0.0, state: 8 Purging
*Mar 1 07:08:57.178: DHCP transaction id: FCC108
*Mar 1 07:08:57.178: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:08:57.178: No timer running
*Mar 1 07:08:57.178: Retry count: 0 Client-ID:
*Mar 1 07:09:01.278: DHCP: QScan: Purging entry
*Mar 1 07:09:01.278: DHCP: deleting entry 622AE168 0.0.0.0 from list
*Mar 1 07:09:01.278: Temp IP addr: 0.0.0.0 for peer on Interface: unknown
*Mar 1 07:09:01.278: Temp sub net mask: 0.0.0.0
*Mar 1 07:09:01.278: DHCP Lease server: 0.0.0.0, state: 8 Purging
*Mar 1 07:09:01.278: DHCP transaction id: FCC109
*Mar 1 07:09:01.278: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:09:01.278: No timer running
*Mar 1 07:09:01.278: Retry count: 0 Client-ID:
*Mar 1 07:09:05.378: DHCP: QScan: Purging entry
*Mar 1 07:09:05.378: DHCP: deleting entry 622A94C8 0.0.0.0 from list
*Mar 1 07:09:05.378: Temp IP addr: 0.0.0.0 for peer on Interface: unknown
*Mar 1 07:09:05.378: Temp sub net mask: 0.0.0.0
*Mar 1 07:09:05.378: DHCP Lease server: 0.0.0.0, state: 8 Purging
*Mar 1 07:09:05.378: DHCP transaction id: FCC10A
*Mar 1 07:09:05.378: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:09:05.378: No timer running
*Mar 1 07:09:05.378: No timer running
*Mar 1 07:09:09.478: DHCP: QScan: Purging entry
*Mar 1 07:09:09.478: DHCP: deleting entry 629D34B0 0.0.0.0 from list
*Mar 1 07:09:09.478: Temp IP addr: 0.0.0.0 for peer on Interface: unknown
*Mar 1 07:09:09.478: Temp sub net mask: 0.0.0.0
*Mar 1 07:09:09.478: DHCP Lease server: 0.0.0.0, state: 8 Purging
*Mar 1 07:09:09.478: DHCP transaction id: FCC10B
*Mar 1 07:09:09.478: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:09:09.478: No timer running
*Mar 1 07:09:09.478: Retry count: 0 Client-ID:
*Mar 1 07:09:13.578: DHCP: QScan: Purging entry
*Mar 1 07:09:13.578: DHCP: deleting entry 629D3684 0.0.0.0 from list
*Mar 1 07:09:13.578: Temp IP addr: 0.0.0.0 for peer on Interface: BRI0/0:1
*Mar 1 07:09:13.578: Temp sub net mask: 0.0.0.0
*Mar 1 07:09:13.578: DHCP Lease server: 0.0.0.0, state: 8 Purging
*Mar 1 07:09:13.578: DHCP transaction id: FCC10C
*Mar 1 07:09:13.578: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:09:13.578: No timer running
*Mar 1 07:09:13.578: Retry count: 0 Client-ID:
cisco-139.3.45.5-BRI0/0:1
*Mar 1 07:10:18.866: %ISDN-6-DISCONNECT: Interface BRI0/0:1 disconnected
from
5272034 , call lasted 120 seconds
*Mar 1 07:10:18.918: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to
down
*Mar 1 07:10:18.922: %DIALER-6-UNBIND: Interface BR0/0:1 unbound from profile
D
i1
*****************************************************************************
********************

I also did a deb dhcp on R1, the dhcp server, but got nothing at all.

Here's R4's config. R4 is the dhcp client and is suppose to get an ip address
assigned to it dialer interface.

interface Dialer1
 ip address negotiated
 encapsulation ppp
 dialer pool 1
 dialer string 5272035
 dialer caller 5272035 callback

Here's R5's config:

ip dhcp-server 139.3.15.1

interface Dialer1
 ip address 139.3.45.5 255.255.255.0
 encapsulation ppp
 dialer pool 1
 dialer string 5272034
 dialer-group 1
 peer default ip address dhcp

Here's R1's config. R1 is the dhcp server.

ip dhcp excluded-address 139.3.45.5 139.3.45.255
ip dhcp excluded-address 139.3.45.0 139.3.45.3
!
ip dhcp pool FOR-R4
   network 139.3.45.0 255.255.255.0

Here's the topology:

R4 --- isdn ---- R5 --- f/r --- R1

I'm not running any routing protocols, but R5 and R1 can ping each other.

R5 can call R4. When it does, R4 takes the call, hangup, and calls R5 back.
But, once the call is connected, R4 and R5 still can't ping each other. A
debug on R5 shows the pings are "unroutable". I don't know why since, of
course, R4 and R5 are directly connected.

Can anybody help me understand what's going on here with dhcp and the ping
problem?

Thanks for any insight.

Tim



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